Lenovo ThinkCentre M71z, Hardware Maintenance Manual

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Message/Symptom FRU/Action
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
Blank screen except for flashing cursor. 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 61.
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
Program loads from the hard disk with a known-good
diagnostics diskette in the first 3.5-inch diskette drive 1. Run the Setup Utility program and check Startup
sequence.
2. Diskette Drive
3. Diskette Drive Cable
4. System Board
5. Power Supply
RPL computer cannot access programs from its own hard
disk. 1. If network administrator is using LCCM Hybrid RPL,
check startup sequence:
a. First device - network
b. Second device - hard disk
2. Hard disk drive
RPL computer does not RPL from server 1. Check startup sequence.
2. Check the network adapter LED status.
Serial or parallel port device failure (system board port) 1. External Device Self-Test OK?
2. External Device
3. Cable
4. System Board
Chapter 7
.
Symptom-to-FRU Index
81