Lenovo ThinkCentre A51 Hardware Maintenance Manual - Page 5
Contents - power supply
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Contents Chapter 1. About this manual . . . . . 1 Important Safety Information 1 Strategy for replacing FRUs for CTO, CMV, and GAV products 2 Product definition 2 FRU Identification for CTO, CMV, and GAV products 2 Important information about replacing RoHS compliant FRUs 3 Chapter 2. Safety information . . . . . 5 General safety 5 Electrical safety 5 Safety inspection guide 7 Handling electrostatic discharge-sensitive devices . . 8 Grounding requirements 8 Safety notices (multi-lingual translations) . . . . . 9 Chapter 3. General information . . . . 41 The Access IBM program 41 Additional information resources 41 Physical specifications 41 Types 8095, 8096, 8141, 8142, 8145, 8420, and 8421 42 Types 8097, 8143, 8144, 8146, 8422, 8423 and 8427 43 Types 8098, 8171, 8172, 8173, 8424, and 8425 . . 44 Chapter 4. General Checkout . . . . . 45 Problem determination tips 46 Chapter 5. Diagnostics using PC-Doctor for DOS 49 Starting PC-Doctor from the Rescue and Recovery workspace 49 Starting PC-Doctor from a diagnostic diskette or CD-ROM 50 Diagnostics program download 50 Navigating through the diagnostics programs . . . 50 Running diagnostics tests 50 Test selection 51 Test results 51 Fixed disk advanced test (FDAT 51 Quick and Full erase - hard drive 53 Viewing the test log 54 Chapter 6. Using the Setup Utility . . . 55 Starting the Setup Utility program 55 Viewing and changing settings 55 Exiting from the Setup Utility program . . . . . 55 Using passwords 55 Password considerations 56 User Password 56 Administrator Password 56 IDE Drive User Password 56 IDE Drive Master Password 56 © Lenovo 2005, 2008. Portions © IBM Corp. 2005. Setting, changing, and deleting a password . . . 57 Using Security Profile by Device 57 Selecting a startup device 58 Selecting a temporary startup device . . . . . 58 Changing the startup device sequence . . . . 58 Advanced settings 58 Chapter 7. Symptom-to-FRU Index . . . 59 Hard disk drive boot error 59 Power Supply Errors 59 Diagnostic error codes 61 Beep symptoms 82 No-beep symptoms 84 POST error codes 85 Miscellaneous error messages 88 Undetermined problems 90 Chapter 8. Replacing FRUs (Types 8095, 8141, 8142, 8145, 8420, and 8421) 91 Locating controls and connectors on the front of the computer 91 Locating connectors on the rear of the computer . . 92 Removing the cover 92 Locating components 94 Identifying parts on the system board . . . . . 95 Removing and replacing memory 96 Removing and replacing a PCI adapter . . . . . 97 Removing and replacing the battery 98 Removing and replacing the power supply . . . . 99 Removing and replacing the system board . . . 101 Removing and replacing the microprocessor . . . 103 Removing and replacing the hard disk drive . . . 109 Removing and replacing the optical drive . . . . 110 Removing and replacing the diskette drive . . . 111 Removing and replacing the fan assembly . . . . 112 Closing the cover and connecting cables . . . . 113 Chapter 9. Replacing FRUs (Types 8143, 8144, 8146, 8422, 8423, and 8427 115 Locating controls and connectors on the front of the computer 115 Locating connectors on the rear of the computer 116 Removing the cover 116 Locating components 117 Identifying parts on the system board . . . . . 118 Removing and replacing memory 119 Removing and replacing a PCI adapter . . . . . 120 Removing and replacing the battery 121 Removing and replacing the power supply . . . 121 Removing and replacing the system board . . . 124 Removing and replacing the microprocessor . . . 126 Removing and replacing the hard disk drive . . . 131 Removing and replacing the optical drive . . . . 132 iii