IBM ThinkPad 390 Hardware Maintenance Manual

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.
Note: To run the diagnostics, refer to “Running the
Diagnostics” on page 42
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 System Checkout”
on page 28, then use table
in “Power-Related
Symptoms” on page 38.
POST does not complete.
No beeps or error
codes/messages are indi-
cated.
“Symptom-to-FRU Index” on
page 33, then use table in
“No Beep Symptoms” on
page 37.
POST beeps, but no error
codes are displayed.
“Symptom-to-FRU Index” on
page 33.
POST detected an error and
displayed numeric error
codes.
“Symptom-to-FRU Index” on
page 33, then use table in
“Numeric Error Codes” on
page 34.
The diagnostic test detected
an error and displayed a
FRU code.
“Running the Diagnostics”
on page 42.
Other symptoms (such as
LCD display problems).
“Symptom-to-FRU Index” on
page 33.
Symptoms cannot be recre-
ated (intermittent problems).
Use the customer-reported
symptoms, and go to
“Symptom-to-FRU Index” on
page 33.
Audio Checkout
Do as follows:
1. Go to the Startup menu by selecting Audio Play and
Record Test in the diagnostic diskette..
2. If no music is played, replace the speaker or the
planar board.
Diskette Drive Checkout
Do the following to isolate the problem to a controller,
drive, or diskette. A scratch, write-enabled, non-defective,
high-density (2HD) diskette is required.
ThinkPad 390/i Series 1700 25

IBM ThinkPad 390 Specifications

General

Brand	IBM
Model	ThinkPad 390
Category	Laptop
Language	English