Message/Symptom

FRU/Action

 

 

Incorrect memory size during POST

1. Run the Memory tests

 

2.

Memory Module

 

3.

System Board

 

 

"Insert a Diskette" icon appears with a known-good

1. System Board

diagnostics diskette in the first 3.5-inch diskette drive.

2.

Diskette Drive Cable

 

 

3.

Network Adapter

 

 

 

Intensity or color varies from left to right of characters

1.

Display

and color bars

2.

Video adapter (if present)

 

 

3.

System Board

 

 

No power or fan not running

See “Power problems” on page 33.

 

 

Non-system disk or disk error-type message with a

1. Diskette Drive

known-good diagnostic diskette.

2.

System Board

 

 

3.

Diskette Drive Cable

 

 

Other display symptoms not listed above (including blank

1. Display

or illegible display)

2.

System Board

 

 

 

Power-on indicator or hard disk drive in-use light not on,

1. Power switch/LED assembly

but computer works correctly

2.

System Board

 

 

 

 

Printer problems

1.

Printer

 

2.

System Board

 

 

Program loads from the hard disk with a known-good

1. Run the Setup and Utility program and check Startup

diagnostics diskette in the first 3.5-inch diskette drive

 

sequence.

 

2.

Diskette Drive

 

3.

Diskette Drive Cable

 

4.

System Board

 

5.

AC/DC power adapter

 

 

PXE computer cannot access programs from its own hard

Replace the hard disk drive

disk.

 

 

 

 

PXE computer does not PXE from server

1. Check startup sequence

 

2.

Check the network adapter LED status

 

 

Some or all keys on the keyboard do not work

1. Keyboard

 

2.

Keyboard Cable

 

3.

System Board

 

 

 

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.

a.External devices (modem, printer, or mouse)

b.Any adapter cards

c.Memory modules

d.Extended video memory

66ThinkCentre Hardware Maintenance Manual

Page 72
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Lenovo 384, 4168, 5067, 7516, 7519, 5027, 266, 2491 manual Undetermined problems