Lenovo ThinkCentre A57, Hardware Maintenance Manual

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Message/Symptom FRU/Action
Computer will not perform a Wake On LAN® (if applicable) 1. Check power supply and signal cable connections
to network adapter
2. Ensure that the operating system settings are set to
enable Wake on LAN®
3. Ensure Wake On LAN feature is enabled in
Setup/Configuration (see “Starting the Setup Utility
program” on page 41)
4. Ensure network administrator is using correct MAC
address
5. Ensure no interrupt or I/O address conflicts
6. Network adapter (advise network administrator of new
MAC address)
Dead computer. See “Hard disk drive boot error” on page
45. 1. Power Supply
2. System Board
Diskette drive in-use light remains on or does not light
when drive is active. 1. Diskette Drive
2. System Board
3. Diskette Drive Cable
Flashing cursor with an otherwise blank display.
1. System Board
2. Primary Hard Disk Drive
3. Hard Disk Drive Cable
Incorrect memory size during POST 1. Run the Memory tests
2. Memory Module
3. System Board
"Insert a Diskette" icon appears with a known-good
diagnostics diskette in the first 3.5-inch diskette drive. 1. System Board
2. Diskette Drive Cable
3. Network Adapter
Intensity or color varies from left to right of characters
and color bars 1. Display
2. Video adapter (if present)
3. System Board
No power or fan not running 1. See “Hard disk drive boot error” on page 45.
Non-system disk or disk error-type message with a
known-good diagnostic diskette. 1. Diskette Drive
2. System Board
3. Diskette Drive Cable
Other display symptoms not listed above (including blank
or illegible display)
1. Display
2. System Board
Power-on indicator or hard disk drive in-use light not on,
but computer works correctly
1. Power switch/LED assembly
2. System Board
Printer problems 1. Printer
2. System Board
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ThinkCentre Hardware Maintenance Manual