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Miscellaneous error conditions
Message/Symptom FRU/Action
Changing display colors Display/Monitor
Computer will not power-off. See “Hard disk drive boot
error” on page 61
.
1. Power Switch
2. System Board
3. Riser card, if installed
Computer will not RPL from server
1. Ensure that network is in startup sequence as rst
device or rst device after diskette
2. Ensure that network adapter is enabled for RPL
3. Network adapter (Advise network administrator of
new MAC address)
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/Conguration (see “Starting the Setup Utility
program” on page 55)
4. Ensure network administrator is using correct MAC
address
5. Ensure no interrupt or I/O address conicts
6. Network adapter (advise network administrator of
new MAC address)
Dead computer. See “Hard disk drive boot error” on page
61
.
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 rst 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 61.
64 ThinkCentre E93 Hardware Maintenance Manual