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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
DOS diagnostics program. See “PC-Doctor DOS System
Diagnostics” on page 48 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 48
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 32, then use table
in “Power-Related
Symptoms” on page 43.
POST does not complete.
No beeps or error
codes/messages are indi-
cated.
“Symptom-to-FRU Index” on
page 38, then use table in
“No Beep Symptoms” on
page 41.
POST beeps, but no error
codes are displayed.
“Symptom-to-FRU Index” on
page 38.
POST detected an error and
displayed numeric error
codes.
“Symptom-to-FRU Index” on
page 38, then use table in
“Numeric Error Codes” on
page 39.
The diagnostic test detected
an error and displayed a
FRU code.
“Running the Diagnostics”
on page 48.
Other symptoms (such as
LCD display problems).
“Symptom-to-FRU Index” on
page 38.
Symptoms cannot be recre-
ated (intermittent problems).
Use the customer-reported
symptoms, and go to
“Symptom-to-FRU Index” on
page 38.
26 ThinkPad 390X / i 1700 HMM