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Checkout Guide
Use the following procedure as a guide for computer prob-
lems. Besides the checkout tests described in this section,
there are other items you can test for using the PC Doctor
diagnostics program. See “PC Doctor System Diagnostics”
on page 51 for details.
Note: The diagnostic tests are intended to test only IBM
products. Non-IBM products, prototype cards, or
modified options can give false errors and invalid
system responses.
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 50
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 33, then use table
in “Power-Related
Symptoms” on page 44.
POST does not complete.
No beeps or error
codes/messages are indi-
cated.
“Symptom-to-FRU Index” on
page 39, then use table in
“No Beep Symptoms” on
page 43.
POST beeps, but no error
codes are displayed.
“Symptom-to-FRU Index” on
page 39.
POST detected an error and
displayed numeric error
codes.
“Symptom-to-FRU Index” on
page 39, then use table in
“Numeric Error Codes” on
page 40.
The diagnostic test detected
an error and displayed a
FRU code.
“Running the Diagnostics”
on page 50.
Other symptoms (such as
LCD display problems).
“Symptom-to-FRU Index” on
page 39.
Symptoms cannot be recre-
ated (intermittent problems).
Use the customer-reported
symptoms, and go to
“Symptom-to-FRU Index” on
page 39.
ThinkPad 390E 27