Lenovo ThinkCentre M90s Gen 2 Hardware Maintenance Manual page 43

Message/Symptom
Computer will not RPL from server
Computer will not perform a Wake On LAN
Dead computer. See "Hard disk drive boot error" on page
34.
Diskette drive in-use light remains on or does not light
when drive is active.
Blank screen except for flashing cursor.
Incorrect memory size during POST
"Insert a Diskette" icon appears with a known-good
diagnostics diskette in the first 3.5-inch diskette drive.
Intensity or color varies from left to right of characters and
color bars
No power or fan not running
Non-system disk or disk error-type message with a
known-good diagnostic diskette.
Other display symptoms not listed above (including blank
or illegible display)
FRU/Action
1. Ensure that the network is in startup sequence as the
first device or the first device after diskette.
2. Ensure that the network adapter is enabled for RPL.
3. Network adapter (Advise network administrator of
new MAC address)
®
(if applicable)
1. Check the power supply and signal cable
connections to the network adapter.
2. Ensure that the operating system settings are set to
enable Wake on LAN.
3. Ensure that the Wake On LAN feature is enabled in
Setup/Configuration.
4. Ensure that the network administrator is using the
correct MAC address.
5. Ensure no interrupt or I/O address conflicts.
6. Network adapter (advise network administrator of
new MAC address)
1. Power Supply
2. System Board
1. Diskette Drive
2. System Board
3. Diskette Drive Cable
1. System Board
2. Primary Hard Disk Drive
3. Hard Disk Drive Cable
1. Run the Memory tests.
2. Memory Module
3. System Board
1. System Board
2. Diskette Drive Cable
3. Network Adapter
1. Display
2. Video adapter (if present)
3. System Board
1. See "Hard disk drive boot error" on page 34.
1. Diskette Drive
2. System Board
3. Diskette Drive Cable
1. Display
2. System Board
Chapter 4
.
Service checkout and symptom-to-FRU index
37