Undetermined Problems - Lenovo ThinkCentre A70 7099 Hardware Maintenance Manual

Undetermined problems

If you encounter undetermined problems, do the following:
1. Turn off the computer and the power.
2. Remove or disconnect the following components (if installed) one at a time.
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Hardware Maintenance Manual
Message/Symptom
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)
Some or all keys on the keyboard do not
work
a. External devices (modem, printer, or mouse)
b. Any adapter cards
c. Memory modules
d. Extended video memory
FRU/Action
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 Setup and check Startup sequence.
2. Diskette Drive
3. Diskette Drive Cable
4. System Board
5. 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