Testing The Computer - IBM ThinkPad S30 Hardware Maintenance Manual

Symptoms (Verified)
Power failure. (The power-on
indicator does not go on or stay
on.)
POST does not complete. No
beeps or error codes/messages
are indicated.
POST beeps, but no error
codes are displayed.
POST detected an error and
displayed numeric error codes.
The diagnostic test detected an
error and displayed a FRU
code.
Other symptoms (such as LCD
display problems).
Symptoms cannot be recreated
(intermittent problems).

Testing the computer

The ThinkPad computer has a test program called
PC-Doctor for DOS (hereafter called PC-Doctor). You can
detect errors by running the diagnostics test of PC-Doctor.
This section is an overview on detecting the problem.
To run the test, do the following:
Note: In the following procedure, you can select an item
not only with the arrow keys, but also with the
TrackPoint. Instead of pressing Enter, you can also
click the left click button.
1. Connect the USB diskette drive to the computer.
2. Insert the PC-Doctor DOS Disk into the diskette drive;
then power on the computer.
If the computer cannot be powered on, go to "Power
System Checkout" on page 14 and check the power
sources.
If an error code appears, go to "Symptom-to-FRU
Index" on page 19.
The PC-Doctor main panel appears.
3. Select Diagnostics with the arrow keys, and press
Enter.
A pull-down menu appears:
10
ThinkPad s30, s31
Go to
"Power System Checkout" on
page 14, then use table in
"Power-Related Symptoms" on
page 23.
"Symptom-to-FRU Index" on
page 19, then use table in "No
Beep Symptoms" on page 22.
"Symptom-to-FRU Index" on
page 19.
"Symptom-to-FRU Index" on
page 19, then use table in
"Numeric Error Codes" on
page 19.
"Running the Diagnostics" on
page 27.
"Symptom-to-FRU Index" on
page 19.
Use the customer-reported
symptoms, and go to
"Symptom-to-FRU Index" on
page 19.