Lenovo ThinkPad R50 Hardware Maintenance Manual (HMM) - 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 34 Testing the computer 34 Detecting system information with PC-Doctor. . . 37 Power system checkout 37 ThinkPad R50/R50p and R51 Series 41 Product overview 43 Specifications 43 Status indicators 48 FRU tests 50 Fn key combinations 52 Symptom-to-FRU index 54 Numeric error codes 54 Error messages 58 Beep symptoms 59 No-beep symptoms 59 LCD-related symptoms 60 Intermittent problems 61 Undetermined problems 61 FRU replacement notices 62 Screw notices 62 Retaining serial numbers 63 Removing and replacing a FRU 66 1010 Battery pack 67 1020 Ultrabay Enhanced device 68 © Lenovo 2005. Portions © IBM Corp. 2005. iii