Lenovo ThinkPad 360 Hardware Maintenance Manual

ThinkPad 755CE, 755CSE, 755CV,755CX (9545)General Checkout . . . . . . . . . . . . . . . . 393Memory Checkout . . . . . . . . . . . . . . 393System Board and Processor Card Checkout . 395Keyboard/Auxiliary Input Device Checkout . . . 396TrackPoint III Checkout . . . . . . . . . . . 396Diskette Drive Test . . . . . . . . . . . . . 397Power Systems Checkout . . . . . . . . . . 398Power Management Features . . . . . . . . 405Symptom-to-FRU Index . . . . . . . . . . . . . 408Numeric Error Codes . . . . . . . . . . . . . 408FRU Codes . . . . . . . . . . . . . . . . . 411Beep Symptoms . . . . . . . . . . . . . . . 412No Beep Symptoms . . . . . . . . . . . . . 413LCD Related Symptoms . . . . . . . . . . . 413Model 755CV Symptoms . . . . . . . . . . . 414Keyboard/TrackPoint III Related Symptoms . . 416Indicator Related Symptoms . . . . . . . . . 416Power Related Symptoms . . . . . . . . . . 416Function/Audio Related Symptoms . . . . . . 417Peripheral Device Related Symptoms . . . . . 417Infrared Related Symptoms . . . . . . . . . . 418Other Symptoms . . . . . . . . . . . . . . . 418Intermittent Problems . . . . . . . . . . . . 418Undetermined Problems . . . . . . . . . . . 419Related Service Procedures . . . . . . . . . . . 420Status Indicators . . . . . . . . . . . . . . . 420How to Run the Diagnostics . . . . . . . . . 421Error Log . . . . . . . . . . . . . . . . . . 421Reset Pushbutton . . . . . . . . . . . . . . 422Checking the Installed Devices List . . . . . . 422Password Combinations . . . . . . . . . . . 422How to Run the Low Level Format . . . . . . 423PC Test Card LED . . . . . . . . . . . . . . 423Fn Key Combinations . . . . . . . . . . . . 423How To Run the Keyboard Diagnostics . . . . 424Product Overview . . . . . . . . . . . . . . . . 424FRU Removals and Replacements . . . . . . . . 4261010 Rear Connector Door . . . . . . . . . 4271015 Foot . . . . . . . . . . . . . . . . . 4271020 Battery Pack . . . . . . . . . . . . . 4281030 Diskette Drive . . . . . . . . . . . . . 4291040 Hard Disk Drive . . . . . . . . . . . . 4301050 IC DRAM Card or DIMM Adapter . . . . 4311070 Diskette Drive Bezel . . . . . . . . . . 4341080 Keyboard Unit . . . . . . . . . . . . . 4351090 Status Indicator . . . . . . . . . . . . 4371100 Standby Battery and Front IR . . . . . . 4381110 Backup Battery . . . . . . . . . . . . 4391115 Logic Assembly . . . . . . . . . . . . 4401120 Shield Assembly . . . . . . . . . . . . 442 Copyright IBM Corp. 1995 391