Lenovo AIO V540-24IWL Hardware Maintenance Manual page 42

Message/Symptom
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)
Power-on indicator or hard disk drive in-use light not on,
but computer works correctly
Printer problems
Program loads from the hard disk with a known-good
diagnostics diskette in the first 3.5-inch diskette drive
RPL computer cannot access programs from its own hard
disk.
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Hardware Maintenance Manual
FRU/Action
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 32.
1. Diskette Drive
2. System Board
3. Diskette Drive Cable
1. Display
2. System Board
1. Power switch/LED assembly
2. System Board
1. Printer
2. System Board
1. Run the Setup Utility program and check the Startup
sequence.
2. Diskette Drive
3. Diskette Drive Cable
4. System Board
5. Power Supply
1. If the network administrator is using LCCM Hybrid
RPL, check the startup sequence:
a. First device - network
b. Second device - hard disk
2. Hard disk drive