Undetermined Problems - Lenovo M55p - ThinkCentre - 8808 Hardware Maintenance Manual

Message/Symptom
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)
Some or all keys on the keyboard do not work

Undetermined problems

Check the power supply voltages (see "Hard disk drive boot error" on page 51) If the voltages are correct,
return here and continue with the following steps.
1. Power-off the computer.
2. Remove or disconnect the following components (if installed) one at a time.
a. External devices (modem, printer, or mouse)
b. Any adapters
c. Riser card
d. Memory modules
e. Extended video memory
f. External Cache
g. External Cache RAM
h. Hard disk drive
i. Diskette drive
3. Power-on the computer to re-test the system.
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Hardware Maintenance Manual
FRU/Action
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
1. Keyboard
2. Keyboard Cable
3. System Board