Lenovo 821532U - ThinkCentre M52 - 8215 Hardware Maintenance Manual page 93

Message/Symptom
"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.
RPL computer does not RPL from server
Serial or parallel port device failure (system
board port)
Serial or parallel port device failure (adapter
port)
FRU/Action
1. System Board
2. Diskette Drive Cable
3. Riser card
4. Network Adapter
1. Display
2. System Board
1. See "Power Supply Errors" on page 57.
1. Diskette Drive
2. System Board
3. Diskette Drive Cable
4. Riser card
1. Display
2. System Board
1. Power Supply
2. System Board
3. LED Cables
1. Printer
1. Run Setup
2. Diskette Drive
3. Diskette Drive Cable
4. System Board
5. Riser card
6. Power Supply
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
1. Check startup sequence
2. Check the network adapter LED status
1. External Device Self-Test OK?
2. External Device
3. Cable
4. System Board
1. External Device Self-Test OK?
2. External Device
3. Cable
4. Alternate Adapter
5. System Board
Chapter 7. Symptom-to-FRU Index
87