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Contents ThinkPad 240 Hardware Maintenance Manual . . 1 Read This First ... 1 What to Do First ... 2 How to Disable the Password ... 3 Product Overview ... 4 Fn Key Combinations ... 5 Status Indicators ... 6 Checkout Guide ... 7 Audio Checkout ... 8 Fan ASM Checkout ... 8 Keyboard and Auxiliary Input Device Checkout . 9 Memory Checkout ... 9 Modem Board Checkout ... 10 Power System Checkout ... 10 TrackPoint Checkout ... 12 I/O Ports Checkout ... 13 Power Management Features ... 13 Symptom-to-FRU Index ... 16 Numeric Error Codes ... 16 Error Messages ... 18 No Beep Symptoms ... 19 LCD-Related Symptoms ... 19 Keyboard-Related Symptoms ... 19 Indicator-Related Symptoms ... 19 Power-Related Symptoms ... 20 PC Card (PCMCIA)-Related Symptoms ... 20 Speaker-Related Symptoms ... 20 Power Management-Related Symptoms ... 20 Peripheral-Device-Related Symptom ... 21 Intermittent Problems ... 21 Undetermined Problems ... 22 CE Utility Program Diskette ... 23 Writing the VPD Data ... 23 Flash UUID ... 23 Running the Diagnostics ... 23 FRU Removals and Replacements ... 24 FRU Service Procedures ... 24 1010 Battery ASM ... 26 1020 Hard disk Drive ... 27 1030 Keyboard ... 28 1040 Modem Card ... 30 1050 DIMM Card ... 31 1060 LCD Unit ASM ... 32 1070 Upper Cover ASM ... 34 1080 Speaker ASM ... 36 1085 Select Button ASM ... 37 1090 Cable ASM and Cable ASM LED-R ... 38 1100 Fan ASM ... 39 1110 Modem Cable ASM ... 41 1120 Water Channel ASM ... 42 1130 System Board ... 43 1135 Rear Bracket ... 45 1140 PCMCIA Slots ... 46 1150 LCD Bezel ASM ... 47 1160 LCD Inverter ASM ... 49 1180 LCD FPC ASM (LCD Type A) ... 51 1185 LCD FPC ASM (LCD Type B) ... 52 1190 Hinge ASM ... 53 Computer Parts Listing ... 54 LCD Unit Parts Listing (LCD Type A) ... 58 LCD Unit Parts Listing (LCD Type B) ... 59 Service Tools ... 59 Notices ... 61 Trademarks ... 61 iv ThinkPad