Lenovo ThinkPad T42 Hardware Maintenance Manual - Page 3
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Contents About this manual 1 Introduction 3 Important service information 3 Strategy for replacing FRUs 3 How to use error messages 4 Diskette compatibility matrix 4 Safety notices: multilingual translations 4 Safety information 16 General safety 16 Electrical safety 17 Safety inspection guide 19 Handling devices that are sensitive to electrostatic discharge 20 Grounding requirements 21 Laser compliance statement 22 General descriptions 25 Read this first 25 What to do first 25 Related service information 27 Service Web site 27 Restoring the pre-installed system 27 Passwords 28 Power management 32 Checkout guide 35 Testing the computer 35 Detecting system information with PC-Doctor. . . 38 Power system checkout 39 ThinkPad T40/T40p, T41/T41p, T42/T42p Series 43 Product overview 45 Specifications 45 Status indicators 50 FRU tests 53 Fn key combinations 54 Symptom-to-FRU index 58 Numeric error codes 58 Error messages 62 Beep symptoms 63 No-beep symptoms 63 LCD-related symptoms 64 Intermittent problems 65 Undetermined problems 65 FRU replacement notices 66 Screw notices 66 Retaining serial numbers 67 Removing and replacing a FRU 70 1010 Battery pack for 14.1-in. LCD models . . . 71 1020 Battery pack for 15.0-in. LCD models . . . 73 © Lenovo 2006. Portions © IBM Corp. 2006. iii