ThinkPad 700 / 720

Four variants side by side, compiled from a hardware survey and IBM's product records. A value spanning several columns applies to each of those variants; a dash means no source records it.

IBM model codes — 1 model of machine type 9552

Variant	Model codes
ThinkPad 720	9552-ALL

The ThinkPad 700 and 700C (1992) were among the first ThinkPad notebooks and introduced the TrackPoint pointing stick; the 720 and 720C (1993) are their faster 486SLC2 successors.

The diagnostic tests are intended to test only IBM products. Non-IBM products, prototype card, or modified options can give false errors and invalid system responses.

Warning: The drives might have been rearranged or the drive startup sequence might have been altered. Be extremely careful during write operations such as copying, saving, or formatting. Data or programs can be written over if you select an incorrect drive.

1. Power-off the computer and all external devices.
2. Check all cables and power cords for correct connection.
3. Make sure that no diskettes are in the drives.
4. Power-on all external devices.

5. Power-on the computer. If any error message appears on the screen, go to Symptom-to-FRU Index.

   If no message appears on the screen, press Ctrl+Alt+Delete to continue. After the cursor moves to the upper right corner of the screen, press Ctrl+Alt+Insert to start the system program. If the IBM logo screen does not appear, insert the backup copy of the system partition into the diskette drive and start the system program again. Then press Ctrl+A, and run the system checkout. For information on how to disable the password, see Power-On Password (700, 700C).

6. Refer to the following table. If you do not find your symptom listed, go to Symptom-to-FRU Index, then go to Undetermined Problem.

Note: For information about how to run diagnostics, error messages, passwords, and various other tests and service checks, go to Related Service Procedures.

• If the TrackPoint II does not work, check the configuration. If the configuration of the TrackPoint II is set to Disabled or Off, change it to Enable or On.

  If the problem remains, continue.

  Note: TrackPoint II automatically compensates to adjust the pointer sensor. This causes the pointer to move slightly on the screen and then stop. Pointer movement might occur when a slight, steady pressure is applied to the TrackPoint II pointer when the computer is powered-on or running, or when exceeded temperature range requires re-adjustment.

• If the cursor floats or moves erratically, power-off and disconnect the mouse. Power-on the computer. If the problem goes away, replace the mouse. If the problem remains, replace the keyboard.

• For click button or pointing stick problems:

  1. Go to the Easy-Setup screen.
  2. Select an item with the pointing stick.
  3. Press either left or right click button.
  4. Verify that both buttons work correctly.

  If the pointing stick or the click button does not work, do the following.

  1. Reseat the keyboard cables.
  2. Replace the keyboard.
  3. Replace the interposer card (355x, 360x, 750x, 755x).
  4. Replace keyboard control card (720).
  5. Replace the system board.

1. Make sure the printer is correctly connected and is powered-on.
2. Run the printer self-test.

If the printer self-test does not run correctly, the problem is in the printer. Refer to the printer service manual.

If the printer self-test runs correctly, do the following.

1. Verify the port settings in configuration.
2. Install a wrap plug on the port (indicated in configuration) and run the advanced diagnostic tests.
3. If the advanced diagnostic tests (with the wrap plug installed) do not detect a failure, replace the printer cable. If the problem is not corrected, replace the system board.

Remove the external keyboard if the internal keyboard is to be tested.

If the internal keyboard does not work or an unexpected character appears, make sure that the three flexible cables extending from the keyboard are correctly seated in the connectors on the system board.

If the keyboard cable connection is correct, run the Keyboard Test by doing the following:

1. Go to advanced diagnostic menu screen by pressing Ctrl+A in the basic diagnostic menu.
2. Press Ctrl+K; a layout of the keyboard appears on the screen.
3. Check that when each key is pressed, the key position on the keyboard layout on the screen changes to a black square.

   Notes:

   1. When a Fn key is pressed, a black square briefly appears.
   2. Press the Esc key to return to the diagnostic menu.

If the tests detect a keyboard problem, do the following one at a time to correct the problem.

Do not replace a non-defective FRU.

• Reseat the three cables.
• Replace the keyboard.
• Replace the system board.

The following auxiliary input devices are supported for this computer.

• Numeric keypad
• Mouse (PS/2 compatible)
• External keyboard (with keyboard/mouse cable)

If any of the above devices do not work, reseat the cable connector and repeat the failing operation.

If the problem does not occur again, recheck the connector.

If the problem is not corrected, replace the device, and then the system board.

Customer diagnostics can eliminate defective memory so no memory error message appears at power-on reset. After you replace a defective base memory card or IC DRAM card, run Automatic configuration. Otherwise, the new memory will not be recognized. Power-off the computer before you remove or replace any parts.

The Installed Devices List shows the adapters and devices installed in the computer.

If an adapter or a device is missing from the list, one of the following conditions might be the cause.

Warning: A customized setup configuration (other than default settings) might exist on the system you are servicing. Running Automatic Configuration can alter the settings. Note the current configuration settings (using the View configuration) and verify that the same settings are in place when service is complete.

• The protected partition on the hard disk or the Reference Diskette you are using does not contain the code required to support the device.
• An adapter or device is defective.
• The device missing from the list is not recognized as a device or adapter.
• The device missing from the list requires an additional diskette. (See the device service manual.)
• A power supply voltage is not correct (see Power Systems Checkout).

If the adapter is on the list, run the adapter diagnostic tests.

If the list contains an adapter or device that is not installed, go to Undetermined Problem.

Use the following procedure to isolate a problem with the ThinkPad 700, 700C voltage converter.

Note: If the problem only occurs when using the computer with a good battery pack, replace the voltage converter.

1. Power-off the computer.
2. Power-off all attached devices and disconnect them from the computer.
3. Unplug the AC adapter cable and remove the battery pack from the computer.
4. Carefully place the computer bottom-side up and remove the bottom cover.
5. Plug the AC adapter cable into the computer.
6. Power-on the computer.

   Important: Be careful not to actuate the suspend switch (located between the Esc key and the LCD) during the operation. When you turn the computer upside down with the LCD opened, put something under the computer to prevent accidentally actuating the suspend switch.

7. Check the voltages of the voltage converter on the system board. See the following figure.

   Signal	V dc Min.	V dc Max.
   VA	+4.75	+5.25
   VG	+4.75	+5.25
   VB	+4.75	+5.25
   VC	+3.42	+3.78
   PWRGOOD	+4.00	+5.25

   

   Note: Only VOLT is marked on the system board. Use the above figure to locate the VA, VG, VB, VC, and PWRGOOD signal names.

   • If all voltages are correct, the voltage converter is operating correctly.
   • If the voltages are not correct, go to the next step.
8. Power-off the computer and unplug the AC adapter cable from the computer.
9. Check for a short circuit between GND and VA, VG, VB, or VC.
   • If there is a short circuit, replace the following FRUs one at a time to correct the problem.
     • Voltage converter
     • System board
   • If there is no short circuit, go to the next step.
10. Check the output voltage of the AC adapter cable (see Checking the AC Adapter).
    • If the output voltage is correct, go to the next step.
11. Replace the following FRUs one at a time.
    • Voltage converter
    • System board

Use the following procedure to isolate a problem with the ThinkPad 720, 720C voltage converter.

1. Power-off the computer.
2. Power-off all attached devices and disconnect them from the computer.
3. Unplug the AC adapter cable, then remove the battery pack from the computer.
4. Carefully place the computer bottom-side up and remove the bottom cover.
5. Plug the AC adapter cable into the computer.
6. Open the LCD half-way, then stand the computer on its front edges so that the suspend switch is not activated.
7. Power-on the computer.
8. Check the voltages of the voltage converter on the system board. See the following figure.

   Notes:

   1. Make sure the suspend switch (located to the left above the keyboard) is not activated during measurement of the voltage.
   2. Only PG is marked on the system board. Use the following figure to locate the VA, VG, VB, VA3, and VB3 signal names.

   

   Signal	V dc Min.	V dc Max.
   VA	+4.75	+5.25
   VG	+4.75	+5.25
   VB	+4.75	+5.25
   VA3	+3.42	+3.78
   VB3	+3.42	+3.78
   PG	+4.00	+5.25

   • If any voltage is not correct, go to step 9.
   • If all voltages are correct, the voltage converter is operating correctly. If the power problem did no reoccur, reconnect the devices removed in step 2 to isolate a device problem.
   • If all the voltages are correct and the power problem still exists, replace the following FRUs one by one.
     • System board
     • Processor card
9. Power-off the computer and unplug the AC adapter cable from the computer.
10. Check for a short circuit between Ground and VA, VG, VB, VA3 or VB3. The following table shows which FRUs can cause a short at each signal.
    • If there is a short circuit (less than 10 ohms), remove the FRUs indicated one at a time until the short circuit disappears. Replace the FRU causing the short circuit.

    FRU	VA	VG	VB	VA3	VB3
    Voltage converter	x	x	x	x
    Processor card			x		x
    System board	x	x	x	x	x
    Video card	x		x	x	x
    Base memory card	x
    Keyboard control card	x		x
    Math coprocessor			x		x
    Diskette drive			x
    Hard disk drive			x
    LCD	x
    Indicator assembly		x	x

11. If there is no short circuit, replace the following FRUs one at a time.
    • Voltage converter
    • System board

Note: One or all of the batteries can discharge if there is a short circuit in the system.

1. Replace the failing FRU if the power supply problem is caused by a short circuit.
2. Determine if one (or all) of the batteries have become discharged. Replace any discharged battery with its spare, if available.

The test procedures for each power supply are found on the following pages.

• Checking the AC Adapter
• Checking the Car Battery Adapter (700 only)
• Checking the Battery Pack
• Checking the Backup Battery
• Checking the Standby Battery
• Checking the Quick Charger
• Checking the Voltage Converter (700, 700C)
• Checking the Voltage Converter (720, 720C)

The suspend and resume functions are unique methods used to save battery power. In suspend mode, all tasks are suspended and their present states are stored in memory to save power. Also, the system enters a sleep state where only a minimum amount of power is used.

When the computer returns to normal operation using the resume function, the computer restores the same states as when it entered suspend mode.

Full and Partial Suspend Modes

Suspend mode might be referred as full-suspend mode, as compared to partial-suspend mode.

The computer enters partial-suspend mode when an application software program interferes with the power management capability of the computer and prevents it from entering full-suspend mode. The following sounds indicate suspend mode has occurred:

• One beep for full-suspend mode
• Two beeps for partial-suspend mode

(No beep is heard if the Power controller beep parameter is set to off in the Set Advanced Features program.)

The computer enters suspend mode when:

• The LCD is closed (the switch is located on the voltage converter card).
• The specified time has elapsed from the last operation with the keyboard, mouse, hard disk drive, parallel connector, diskette drive, and AC adapter is plugged in. The time is specified by System suspend in the Set Advanced Features program.
• When a battery-low condition exists, the battery power indicator blinks (orange).
• The PS2 OFF command is set in the Set Advanced Features program.
• The operating temperature is exceeded.

The system returns to normal operation when:

• The LCD is opened.
• PS2 ON HH:MM:SS command was set in the Set Advanced Features program before entering suspend mode.
• A “Ring indicator” signal on the communication interface is detected.
• Either button of the pointing stick is pressed.

You can replace the battery pack during full-suspend mode. Never replace the battery pack during partial-suspend mode. If the battery pack is replaced during suspend mode with the LCD opened, close the LCD and open it again to return to normal operation.

1. Carefully place the computer bottom-side up.
2. Remove the bottom cover.
3. Disconnect the battery connector from the system board.
4. Measure the voltage of the backup battery.

• If the voltage is correct, replace the system board.
• If the voltage is not correct, the backup battery has been discharged by a short circuit or it is defective.

If the Power-On indicator does not turn-on, check the power cord of the AC adapter for correct continuity and installation.

1. If any noise can be heard from the AC adapter when it is plugged into the ac power outlet, replace the AC adapter.

   If no noise can be heard from the AC adapter, go to step 3.

2. If a noise is still heard from the new AC adapter, suspect the computer. Replace the AC adapter with the original one, then go to the next step. If no noise is heard from the new AC adapter, the original AC adapter is defective.
3. Unplug the AC adapter cable from the computer and measure the output voltage at the plug of the AC adapter cable.

   

   Pin	Voltage (Vdc)
   1	+19.0 to +21.0
   2	Ground

   • If the voltage is not correct, go to the next step.
4. Unplug the AC adapter cable from the ac power outlet and wait for a few minutes.
5. Plug the AC adapter cable into the ac power outlet.
6. Measure the output voltage of the AC adapter.
   • If the voltage is still not correct, replace the AC adapter.
   • If the voltage is correct, plug the AC adapter cable into the computer and try the failing operation again.
   • If the problem goes away, suspect the continuity or installation of the AC adapter cable.
   • If the problem is not corrected, replace the voltage converter.

If the output voltage from the cigarette lighter socket of the car is less than 10.5 Vdc, the power-on indicator on the car battery adapter blinks and a noise can be heard continuously.

1. Unplug the car battery adapter cable from the connector, if connected.
2. Plug the car battery adapter into the cigarette lighter socket.

   Note: If the adapter is already plugged in, be sure to unplug the adapter from the cigarette lighter socket, then plug it into the socket again.

3. Measure the output voltage of the car battery adapter cable.

   

   Pin	Voltage (Vdc)
   1	+19.0 to +21.0
   2	Ground

   • If the voltage is correct and the power-on indicator on the car battery adapter is on all the time, the car battery is working correctly. Replace the voltage converter. If the problem is not resolved when the voltage converter is replaced, go to Checking the Voltage Converter (700, 700C) or Checking the Voltage Converter (720, 720C).
   • If the voltage is outside the normal voltage range, do one of the following:
     • Try the above test procedures using a different car, if one is available.
     • Replace the car battery adapter if the computer works with the AC adapter but does not work with the car battery adapter.

Note: If the output voltage from the cigarette lighter socket of the car is less than 10.5 Vdc, the power-on indicator on the car battery adapter blinks and a continuous noise can be heard. Have the car battery serviced.

1. Carefully place the computer bottom-side up.
2. Remove the battery pack and measure the voltage between the battery terminals 1 (+) and 3 (-).

   

   Pin	Voltage (Vdc)
   1	+10.0 to +18.0
   2	Thermal Detection
   3	Ground

   • If the voltage is less than +10.0 Vdc, the battery pack has been discharged or is defective.
   • If the voltage is more than +10.0 Vdc, go to the next step.
3. Using an ohm meter, measure the resistance between battery terminals 2 (T) and 3 (-). The resistance must be 4 to 30 kilohms.
   • If the resistance is not correct, replace the battery pack.
   • If the resistance is correct, go to the next step.
4. Install the battery pack and plug the AC adapter cable into the computer to charge the battery pack.
   • If the battery power status indicator is blinking (orange) and battery charging indicator is on, replace the battery pack. If the battery is charging normally, the battery is OK.

Note: Make sure that the battery pack is removed from the computer before the standby battery is removed.

1. Power-off the computer and unplug the AC adapter cable from the computer.
2. Remove the battery pack.
3. Remove the indicator cover.
4. Disconnect the standby battery connector from the voltage converter.
5. Plug the AC adapter cable into the computer and power-on the computer.
6. Measure the output voltage at the connector on the voltage converter.

   

   Pin	Voltage (Vdc)
   1	+4
   2	Ground

   • If the voltage is less than +4 Vdc, replace the voltage converter.
   • If the voltage is more than +4 Vdc, go to the next step.
7. Power-off the computer and unplug the AC adapter cable from the computer.
8. Reconnect the standby battery to the voltage converter.
9. Plug the AC adapter cable into the computer and power-on the computer. Allow approximately 30 minutes for the standby battery to charge.
10. Power-off the computer and unplug the AC adapter cable from the computer and remove the standby battery.
11. Measure the voltage of the standby battery.
    • If the voltage is less than 3.5 Vdc, replace the standby battery.

If a humming or buzzing sound is heard from the quick charger when it is operating, replace the quick charger. If the charger is operating at a normal quiet sound level, do the following.

1. Perform steps 1 through 3 of the Checking the Battery Pack to ensure the battery pack is operating correctly.
2. Connect the power cord to the quick charger and the other end to the ac power outlet. Ensure that the power-on indicator is on.
   • If the power-on indicator does not turn on, check the power cord of the quick charger for correct continuity and installation.
   • If the problem is not corrected, replace the quick charger or the power cord.
3. Install the battery pack into the quick charger.
   • If the charging indicator does not start blinking, replace the quick charger.

If the hard disk drive is not operational, you can run the system programs from the Reference Diskette.

Note: The Reference Diskette contains the system programs and the Diagnostic Diskette contains the test programs. The Diagnostic Diskette is not self-starting. To run the Diagnostic Diskette, start the system from the Reference Diskette, select Test the computer, then follow the instructions on the screen.

If the display problem occurs only when using an external display, use the following instructions to correct the problem.

Note: Before you replace a display, check the following list to see if it is connected correctly.

• 8506 and 8508 displays must be connected to an Image Adapter/A or an Image-I Adapter/A.
• 63XX and 85XX systems support either 63XX or 85XX displays.
• 85XX systems with an XGA-2 adapter support 95XX displays.
• 95XX systems support either 63XX, 85XX, or 95XX displays.
• ThinkPad models support either 85XX or 95XX displays.

If the screen is rolling, replace the display assembly. If that does not correct the problem, replace FRUs in the following order until the problem goes away:

1. Video card
2. Display adapter (any type)
3. System board
4. Bus adapter (if used)

If the screen is not rolling, run the display self-test as follows:

1. Power-off the computer and display.
2. Disconnect the display signal cable.
3. Power-on the display.
4. Set the contrast to its maximum position.
5. Set the brightness control to the center detent position.

Check for the following conditions:

• You should be able to vary the screen intensity by adjusting the contrast and brightness controls.
• The screen should be white or light gray, with a black margin (test margin) on the screen.

  Note: The location of the test margin varies with the type of display. The test margin might be on the top, bottom, or one or both sides.

If you do not see a test margin on the screen, replace the display. If there is a test margin on the screen, replace the system board.

To format the hard disk and restore the system partition, do the following.

Warning: The following procedure causes permanent loss of the data on the hard disk. Make sure that a backup of all the information on the hard disk is made.

1. Power-off the computer.
2. Insert the backup copy of the Reference Diskette into the diskette drive.
3. Power-on the computer.
4. Proceed to the Main Menu. Press Ctrl+A to display the Advanced Diagnostic Menu.
5. Select Format the hard disk and follow the instructions on the screen to perform a low level format of the hard disk.
6. After the hard disk format is completed, power-off the computer.
7. Restore the system partition.
8. Reinstall the operating system.

The Symptom-to-FRU Index lists error symptoms and possible causes. The most likely cause is listed first. Always begin with General Checkout. This index also can be used to help you decide which FRUs to have available when servicing a computer.

If you cannot correct the problem using this index, go to Undetermined Problem.

How to Read POST Error Messages

POST error messages are displayed on the screen as 3, 4, 5, or 8 digits. The error messages that can be displayed as shorter POST messages are highlighted in this Symptom-to-FRU Index.

Note: Adjust the speaker volume before you power-on the computer.

You are here because the diagnostic tests did not identify which adapter or device failed, the Devices List is incorrect or the system is inoperative. Follow the procedures below (do not isolate FRUs that are known to be good).

Check the power supply that was being used at the time of the failure. (See Power Systems Checkout.) If the power supply is operating correctly, continue with the following procedure.

1. Power-off the computer.
2. Remove or disconnect one of the following devices or adapter. (Do not isolate FRUs that are known to be good.)
   1. Non-IBM devices
   2. Modem, PC card, printer, mouse, or other external devices
   3. Battery pack
   4. Hard disk drive (removable disk drive)
   5. IC DRAM card
   6. Any adapter or device

   Note: Replacing the hard disk drive, an IC DRAM card, or any adapter or device, might cause configuration errors.

3. Power-on the computer.
4. If the problem is not corrected, repeat steps 1 through 3 until you find the failing FRU or until all FRUs have been removed.
5. If all of the FRUs listed have been removed and the problem is not corrected, replace the following FRUs:
   • System board
   • Processor card
   • Video card

The computer system maintains a system error log. The BIOS nonmaskable interrupt (NMI) handler writes an entry to the error log each time the system detects an error.

Viewing the error log

To view the error log, start the system programs and select More utilities from the Main Menu, then select Display system error log. For any error that is displayed, help screens guide you through the actions to take.

Error Storage

The error log stores up to three unique errors (for example three parity errors at three different addresses). The multiple log counter (on the screen) displays the number of times each unique error occurred. You can page forward by pressing F8, or backward by pressing F7 to view the stored error logs. The date and time of the most recent occurrence also is displayed. If the POST finds that the error log has stored three unique errors, the POST displays a 000179XX error.

Note: If the system configuration is changed, the system clears any logged errors associated with the FRU that was changed. (For example, if the memory configuration was changed, memory errors are cleared from the error log). The conditions under which errors are cleared vary with the type of hardware and level of microcode installed.

Application

If the system diagnostics run error-free, but you still suspect a problem, look at the error log. If errors were detected, press the F1 key and follow the instructions on the screen to help you determine which FRU might be causing the failure.

If a POST error combination of 00017300 and 11350 appears and cannot be bypassed, do the following before replacing any FRUs.

1. Power-off the computer.
2. Remove the hard disk drive from the computer.
3. Insert the Reference Diskette and power-on the computer.
4. Ignore any error messages, press Esc, F8, and Enter, then run Automatic Configuration.
5. Ignore the message An error occurred while updating config and power-off the computer.
6. Install the hard disk drive.
7. Keep the Reference Diskette in drive A and power-on the computer.
8. Ignore any error messages, press Y, and run Automatic Configuration.

In the following error codes, an X can be any number.

Follow the numerical sequence in the FRU removal sequence list and in the exploded view to remove or disconnect parts in the correct order. The letters in parentheses in the list indicate screw types. See the Screw Size Chart to match the letters to the correct screw type and size before replacing each screw.

See the ThinkPad 700 Exploded View or the ThinkPad 720, 720C Exploded View.

1. Battery Pack
   (Press down and pull out)
2. LED Indicator Cover
   (Insert front first, then press rear down.)
3. Video Connector
4. Video Power
5. Hinge Covers
   (Install with bevelled edge at front.)
6. Two Screws (C)
   (One at each end)
7. Four Screws (S)
   (Two at each end)
8. LED Indicator Assembly
   (With connector and contact shield)

Lift LCD Assembly from computer

Place computer bottom-side up

9. Three Screws (S)
   (On bottom cover; two at front-right, one at rear of math coprocessor access door.)
10. Two Memory Bracket Screws (S)
11. Five Screws (4-E, 1-V)
    (From processor card and video card)
12. Memory Module
13. Ribbon Cable
    (At rear of diskette drive)
14. Diskette Drive
    (Hold the eject button pressed while installing.) (Make sure the flexible cable gets into the holder plate opening on the IC DRAM card.)
15. Hard Disk Drive
    (Have the customer backup all information before replacing the drive. Never replace the hard disk drive when the system is operating or in suspend mode. Restore drive system information using the customer's backup copy of the system programs.)
16. Three Keyboard Frame Screws (S)
17. Two Screws (T)
18. System Board
    (Restore system configuration data.)
19. Five Frame Stiffener Screws (S)
20. Frame Stiffener
21. Four Keyboard Screws (S)
22. Keyboard
23. One Screw (S) and Keyboard Control Card
24. Two Screws (R) and Voltage Converter with Suspend Resume Pin
    (Set the lever on the voltage converter to the middle position before installation. Be sure the suspend pin is installed correctly before installing the voltage converter.)

For the Model 720x, you can insert or remove the PCMCIA card during most computer operations. However, do not remove the card when the PC Card in-use light is on.

A prerequisite of 1080 Keyboard Unit. Like that procedure, these drawings come from the ThinkPad 340 (2610) section of IBM's manual; the 700/720 removal order is in FRU Removals and Replacements.

IBM's 700/720 symptom tables refer to this procedure, which comes from the ThinkPad 340 (2610) section of the manual (the drawing shows that machine). The 700/720 removal order is in FRU Removals and Replacements.

• Battery Pack (1020)
• Top Cover (1060)

When Replacing

• Check that the three keyboard cables are clean, and inserted straight and fully into the connectors. Slide both ends of each connector latch at the same time to make sure that each cable is correctly inserted.
• Go to Keyboard / Auxiliary Input Device Checkout and test all keys before returning the computer to the customer.

Review these service procedures before replacing a FRU.

LCD FRU Replacement Notice

If missing or discolored dots appear on the LCD, carefully read the following note to determine whether or not you should replace the LCD.

The LCD for the Model 700C and 720C contains over 921 000 thin film transistors (TFTs). A small number of missing, discolored or lighted dots (on all the time) is characteristic of TFT LCD technology. Excessive pixel problems can cause viewing concerns. The LCD should be replaced if the number of missing, discolored, or lighted dots in any background is 21 or more.

Hinges on the color LCD are part of the FRU and are returned with the FRU.

700, 720 Mono LCD FRU Replacement

Hinges are NOT part of the Model 700 or 720 mono LCD FRU (do not return them with the FRU). When replacing the Model 700 or 720 mono LCD, remove the right and left hinge bracket supports and install them on the new LCD. Return only the main FRU. The left and right hinge bracket supports are included in the Mono Panel Cover Group Kit.

High-Speed Modem Noise Problems

A small number of high speed modems might produce a noise when the system is powered-on. To solve this problem, copy PS2.EXE from the Reference Diskette to the root directory using the UINSTALL program. Then, add the following lines to the AUTOEXEC.BAT file.

PS2 SET MODEM OFF
PS2 SET MODEM ON

If this does not solve the problem, replace the modem.

If you replace the internal hard disk drive, you must recopy all of the system programs onto the replacement hard disk drive. To recopy the programs:

1. Start the system using the customer's backup copy of the system partition.
2. Select Backup/Restore system programs from the Main Menu.
3. Run Restore the system partition to load the IML image, the system programs, and the diagnostic programs onto the hard disk drive just installed.

   Notes:

   1. If there is not a backup copy of the system partition, make one before replacing the hard disk drive. (See Making a System Partition Backup Copy.)
   2. If the customer's backup copy of the system partition is incomplete, you cannot restore the whole system partition. If this occurs, after you have recopied the IML image, get the option diskettes and use Copy an option diskette to recopy the option files onto the system partition.
   3. If the IML image is loaded onto the hard disk drive, but the customer's operating system has not been loaded, the insert diskette icon will appear on the screen.

Use the chart to match the size and shape of the screws in the computer you are servicing.

A prerequisite of 1080 Keyboard Unit, from the ThinkPad 340 (2610) section of IBM's manual; the 700/720 removal order is in FRU Removals and Replacements.

• Battery Pack (1020)

Note: Make sure you use the correct screw. See the Screw Size Chart.

• Front View
• System Board (700)
• System Board (720, 720C)
• Video Card
• Keyboard Control Card
• Voltage Converter

Front View

(picture currently not available)

1. Release Lever
2. LCD
3. Contrast Control
4. Brightness Control
5. System Status Indicator
6. Power-On Light (green)
7. External Input Device Connector
8. System Power Switch
9. Keyboard
10. Reverse Video Switch
11. Hard Disk Drive
12. Integrated Pointing Stick
13. Battery Pack
14. Diskette-Eject Button
15. Diskette Drive
16. Speaker Volume
17. Suspend Switch

1. Pointing Stick Connector
2. System Board Interface
3. Keyboard Connector
4. Keyboard Connector

Codes beginning with “CP” are displayed on the LCD to indicate system status during POST. The CP codes vary with the level of microcode installed and the type of processor card installed. The CP codes are not error codes. If the system detects an error, the CP code is changed to a POST error message.

1. Power-off the computer.
2. Insert the backup copy of the Reference Diskette into the diskette drive.
3. Power-on the computer.
4. Select Set features from the Main Menu.
5. Select Set startup sequence. If you cannot set the startup sequence, replace the system board.
6. Check the list of devices on the Set startup sequence screen.
7. Is the hard disk drive in the list as a startup device?

   Yes

   Exit from this screen and the Main Menu. Remove the backup copy of the Reference Diskette, and power-off the computer. Continue with step 8.

   No

   Add the hard disk drive as a startup device.

8. Is an operating system installed?

   Yes

   Go to step 10.

   No

   Install the operating system.

9. After the operating system is installed, power-off the computer.
10. Power-on the computer.

Note: After the programs have been restored, the Diskette and F1 prompts appear, unless an operating system is present.

If the above sequence does not correct the problem, do the following:

1. Power-off the computer.
2. Insert the backup copy of the Reference Diskette into the diskette drive.
3. Power-on the computer.

   Note: If the I99900X5 error message appears, the power-on password has been set. To disable the power-on password (see Power-On Password (700, 700C)) before continuing with the next step.

4. Select Backup/Restore system programs from the Main Menu, then select Restore the System Partition.
5. When the restore process completes, select Set configuration, then select Run automatic configuration.
6. Power-off the computer and remove the backup copy of the Reference Diskette from the diskette drive.
7. Power-on the computer.

Note: You might need two blank 2.0MB diskettes (or the old backup copy).

1. Power-off the computer, then power it on.
2. After the cursor moves to the upper right corner of the screen, press Ctrl+Alt+Insert.
3. When the Main Menu appears, select Backup/Restore system programs, then select Backup the system partition.
4. Insert a blank 2.0MB diskette into the diskette drive and follow the instructions on the screen.

   Note: If you receive a message indicating that the diskette is full, and you are not prompted to insert a second diskette, this means that you will not be able to make a backup copy of the entire system partition. The user should keep the system diskettes and option diskette as a backup of these files.

5. When the copies are completed, label each diskette.

The numbers in the drawings match the FRU removal sequence in FRU Removals and Replacements.

The numbers in the drawing match the FRU removal sequence in FRU Removals and Replacements.

The continuation drawing for the 720, 720C (LCD, hinge covers and LED indicator cover, steps 2–8) is the same as the ThinkPad 700 Exploded View (continued).

1. External Input Device Connector
2. System-Expansion Connector (240-pin)
3. Parallel Connector
4. Serial Connector
5. Diskette Drive Connector
6. Password-override connector
7. Base Memory Card Interface
8. Video Card Interface
9. Backup Battery Connector
10. Processor Card Interface
11. Hard Disk Drive Connector
12. Speaker Connector
13. Voltage Converter Interface
14. System Status Indicator Connector
15. Keyboard Control Card Interface

1. External Input Device Connector
2. System-Expansion Connector (240-pin)
3. Parallel Connector
4. Serial Connector
5. Password-override Connector
6. PCMCIA Connector
7. Base Memory Card Interface
8. Video Card Interface
9. Backup Battery Connector
10. Hard Disk Drive Connector
11. Processor Card Interface
12. Keyboard Control Card Interface
13. Speaker Connector
14. Voltage Converter Interface
15. Diskette Drive Interface
16. System Status Indicator Connector

1. External Display Connector
2. LCD Connector
3. System Board Connector
4. Communication Adapter Connector

1. Power Jack
2. Battery Pack Interface
3. System Board Interface
4. Standby Battery Connector
5. Suspend/Resume Switch

To disable the ThinkPad 700, 700C power-on password, do the following:

1. Power-off the computer.
2. Remove the battery pack and the bottom cover.
3. Locate the password-override connector on the system board. (See System Board (700).)
4. Install a jumper between the two pins at position 1.
5. Power-on the computer and wait until the POST ends.

Remove the jumper from the password-override connector when service is completed.

To disable the ThinkPad 720, 720C power-on password, do the following:

1. Power-off the computer.
2. Remove the battery pack and the bottom cover.
3. Locate the password-override switch on the system board. (See System Board (720, 720C).)
4. Slide the password-override switch to the left position.
5. Power-on the computer and wait until the POST ends.

Slide the password-override switch to the other position when service is complete.

To reactivate the password, start the system programs, select Set features from the Main Menu, then select Set password and unattended start mode, and follow the instructions on the screen.

When you install the new system diskettes onto the hard disk, all existing files (including option files) in the system partition are written over. The new system diskettes provide the new system programs but they do not contain the option files; therefore, after completing the following process, you must reinstall the option files.

There are two methods to reinstall the option files.

1. From a backup copy of the current system partition. (this is the easiest way to reinstall the option files). For instructions on making a backup copy, see Making a System Partition Backup Copy.
2. From the original option diskettes.

Do the following for both methods.

1. Insert the new version of the Reference Diskette into the diskette drive.
2. Power-off the computer, then power it on. After the cursor moves to the upper right corner of the screen, press Ctrl+Alt+Insert.

   Warning: This process writes over all existing files in the system partition. Before continuing, you must have either a backup copy of the current system partition or all the option diskettes so you can reinstall the option files.

3. Go to the Main Menu of the Reference Diskette and select Backup/Restore system programs, then select Restore the system partition and follow the instructions on the screen. This transfers all files, programs, and the IML image of the new diskette onto the system partition.
4. When the Main Menu appears again, remove the diskette from the diskette drive and power-off the computer, then power it on.
5. After the cursor moves to the upper right corner of the screen, press Ctrl+Alt+Insert.
6. If you have a backup copy of the current system partition, continue with step 7. If you do not have a backup copy of the current system partition, but you have the option diskettes, go to step 8.
7. Select Copy an option diskette from the Main Menu. When the INSERT YOUR OPTION DISKETTE message appears, insert the backup copy of the system partition and follow the instructions on the screen. (The backup copy of the system partition is used to reinstall the option files onto the system partition.) Then go to step 9.
8. Select Copy an option diskette and follow the instructions on the screen. Repeat the procedure with each option diskette until all option diskettes have been reinstalled.
9. If there is a customized configuration installed (settings have been changed via the “Change configuration” screen), continue with step 10. If there is not a customized configuration installed, go to step 11.
10. Select Set configuration from the Main Menu. When you exit from Set configuration by pressing the F3, the customized configuration files will be restored onto the system partition as files @CMOS and @NVRAM.

    Warning: Do not run Run automatic configuration now or you will write over the customized configuration.

11. You are finished with the updating process. Make a new backup copy of the system partition. (For information on making a backup copy, see Making a System Partition Backup Copy.)

This is an option. If a PAP is set, the computer cannot start and you have to get the customer to unlock the PAP. If the PAP is set, then forgotten, it cannot be overridden or removed. The system board must be replaced.

¹ See FRU Service Procedures.

² See FRU Service Procedures.

Options, keyboards, numeric keypads, tools and power cords for all models are listed in Options and Adapters.

³ See FRU Service Procedures.

Options and Adapters

Keyboards w/ Trackpoint II (700, 700C, 720, 720C)

Numeric Keypad (700, 700C, 720, 720C)

Tools

Power Cords

(The drawings of plug types 1–10 were not captured; see the original manual page.)

Warning: Use the power cord certified for your country.

This section contains FRUs common to most IBM portable, laptop, and notebook computers.

External Diskette Drives

CD-ROM Drives

SCSI Adapters, Terminators, Cables

Rewritable Optical Drives

External Keyboard/Mouse

Enhanced Keyboards (101/102 Key)

Optional Enhanced Keyboards (101/102 Key)

Keybutton Kits (101/102 Key)

Japanese Keyboard Type 2 (106 Key, DBCS Support)

Space-Saving Keyboards (84/85 Key)

Tools and Miscellaneous

The ThinkPad 700 uses a 1.44MB diskette drive. Both 1.0MB (formatted 720KB) and 2.0MB (formatted 1.44MB) capacity diskettes can be used in this drive.

The ThinkPad 700 Japanese model uses a diskette drive that supports 1.2MB format on 2.0MB capacity diskettes. When servicing a Japanese model, you must test all three formats.