ThinkPad Laptops

ThinkPad 240

Machine Type 2609 · 1999 · 2 sections

IBM's mini-notebook, launched in 1999: about an inch thick and 3 lb (1.35 kg), with a 10.4-inch screen, a keyboard 95% of full size and no internal diskette or CD-ROM drive. Only the product overview and IBM's battery check are transcribed here. The PSREF sheets listed below give IBM's full specifications; the library has no hardware maintenance manual for this machine.

This transcribed historical service reference may contain incomplete captures. The linked original manuals remain authoritative.

Related Documents

Service Reference

Product Overview #

Three 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.

Specifications by variant
Specification ThinkPad 240 ThinkPad 240X ThinkPad 240Z
Released June 1999 June 2000 —
Processor Intel Mobile Celeron, 300, 366 or 400 MHz (soldered BGA package)
  • Intel Mobile Celeron, 450 MHz
  • Intel Mobile Pentium III, 500 MHz
  • Intel Mobile Celeron, 500 MHz
  • Intel Mobile Pentium III, 600 MHz
Chipset Intel 440DX Intel 440MX —
Bus
  • PCI bus
  • ISA bus
 —
Memory Standard 64 MB soldered; maximum 192 MB; SDRAM (66 MHz), 1 × 144-pin SO-DIMM slot Standard 64 MB soldered; maximum 192 MB; PC100 SDRAM, 1 × 144-pin SO-DIMM slot Standard 64 or 128 MB; PC100 SDRAM, 1 slot
Storage 2.5" IDE: 6.4 or 12 GB 2.5" IDE: 6 or 12 GB 2.5" IDE: 10 or 20 GB
Display 10.4" active matrix, 800 × 600
  • 10.4" active matrix, 800 × 600
  • 10.4" active matrix, 1024 × 768
Graphics NeoMagic MagicGraph 128XD (NM2160), 2 MB video memory Silicon Motion LynxEM+ (SM712), 2 MB video memory Silicon Motion LynxEM+ or LynxEM4+ (SM712), 2 or 4 MB video memory
Audio ESS Solo-1E (ES1946) Crystal CS4281 Crystal CS4297A
Main battery Lithium-ion (3-cell, 6-cell optional) Lithium-ion (3- or 6-cell) —
CMOS battery Soldered lithium cell
Power connector Barrel jack
Media drives None; external drives only
PC Card slots 1 × CardBus (Type II) —
Networking Modem Modem or Ethernet
Ports
  • Parallel
  • Serial
  • VGA out
  • USB 1.x
  • External floppy connector
  • Microphone in
  • Line in
  • Headphone out
  • Infrared
 —
BIOS IBM BIOS
Pointing device TrackPoint
IBM model codes — 83 models of machine type 2609
VariantModel codes
ThinkPad 2402609-15J, 2609-21A, 2609-21C, 2609-21F, 2609-21G, 2609-21H, 2609-21J, 2609-21K, 2609-21M, 2609-21T, 2609-21U, 2609-25J, 2609-31F, 2609-31H, 2609-31J, 2609-31K, 2609-31T, 2609-31U, 2609-35J, 2609-41A, 2609-41C, 2609-41F, 2609-41G, 2609-41H, 2609-41J, 2609-41K, 2609-41M, 2609-41P, 2609-41S, 2609-41T, 2609-41U, 2609-41X
ThinkPad 240X2609-51A, 2609-51C, 2609-51F, 2609-51H, 2609-51J, 2609-51K, 2609-51M, 2609-51P, 2609-51S, 2609-51T, 2609-51U, 2609-51X, 2609-52A, 2609-52C, 2609-52F, 2609-52H, 2609-52J, 2609-52K, 2609-52M, 2609-52P, 2609-52S, 2609-52T, 2609-52U, 2609-52X, 2609-53J, 2609-61A, 2609-61C, 2609-61F, 2609-61G, 2609-61H, 2609-61J, 2609-61K, 2609-61M, 2609-61P, 2609-61S, 2609-61T, 2609-61U, 2609-61X, 2609-62A, 2609-62C, 2609-62F, 2609-62G, 2609-62H, 2609-62J, 2609-62K, 2609-62M, 2609-62P, 2609-62S, 2609-62T, 2609-62U, 2609-62X

Checking the Battery Asm #

Do the following:

  1. Power off the computer

  2. Remove the battery Asm and measure the voltage between battery terminals 1 (+) and 5 (-). See the following figure:

    Battery pack terminals numbered 1 to 5; the voltage is measured between terminal 1 (+) and terminal 5 (-)

    Note: Signal lines, not used in these steps, are used for communications between the system and the battery.

    • If the voltage is less than 10.6V, the battery Asm has been discharged, recharge the battery Asm. If the voltage is still less than 10.6V, replace the battery.