Use the following procedure as a guide for computer prob-
lems.
Notes:
1. The diagnostic tests are intended to test only IBM
products. Non-IBM products, prototype cards, or mod-
ified options can give false errors and invalid system
responses.
2. Some test items require tools as shown below:
Audio wrap cable (P/N: 65G5180)
Erasable 2HD diskette
Parallel: Wrap plug (P/N: 72X8546)
Parallel: Test cable (P/N: 05K2580)
Serial: Wrap plug (P/N: 72X8546)
PCMCIA: PC test card (P/N: 35G4703)
CD-ROM/DVD-ROM: Any data and audio CDs
Screwdriver kit (P/N: 95F3598)
Screwdriver kit (P/N: 05K4693)
Torque screwdriver (P/N: 05K4695)
5mm socket wrench (P/N: 05K4694)
ThinkPad i Series 1400 Diagnostics Diskette (3
diskette pack, P/N: 09N1020)
ThinkPad i Series 1400 Maintenance Diskette
(P/N: 09N1025)
1. Obtain the failing symptoms in as much detail as pos-
sible.
2. Verify the symptoms by attempting to recreate the
failure by running the diagnostic test or by repeating
the same operation.
3. Use the following table with the verified symptom to
determine which page to go to. Search the symptoms
column and find the description that best matches
your symptom; then go to the page shown in the "Go
to" column.
Symptoms (Verified) Go to
Power failure. (The
power-on indicator does not
go on or stay on.)
“Power Systems Check” on
page 111, then use table in
“Power-Related Symptoms”
on page 128.
POST does not complete.
No beeps or error
codes/messages are indi-
cated.
“Symptom-to-FRU Index” on
page 122, then use table in
“No Beep Symptoms” on
page 124.
POST detected an error and
displayed numeric error
code with error message.
“Symptom-to-FRU Index” on
page 122.
110 ThinkPad i Series 1400 HMM