Undetermined Problems - Lenovo ThinkCentre neo 50t Gen 3 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 connector device failure (system board
connector)
Serial or parallel connector device failure (adapter
connector)
Some or all keys on the keyboard do not work

Undetermined problems

This section provides instructions on how to find out the failing devices or adapters.
1. Turn off the computer.
36
ThinkCentre neo 50t Gen 3 Hardware Maintenance Manual
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 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
1. Check the 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