IBM ThinkPad X20 Hardware Maintenance Manual page 37

If the computer cannot be powered on, go to "Power
system checkout" on page 35 and check the power
sources.
If an error code appears, go to "Symptom-to-FRU
index" on page 47.
On the first screen, select the model and press Enter.
Follow the instructions on the screen.
2. The main panel of PC-Doctor appears.
3. Select Diagnostics with the arrow keys, and press
Enter.
A pull-down menu appears. (Its exact form depends on
the model.)
The options on the test menu are as follows:
Diagnostics
v Run Normal Test
v Run Quick Test
v CPU/Coprocessor
v Systemboard
v Video Adapter
v Serial Ports
v Parallel Ports
v Fixed Disks
v Diskette Drives
v Other Devices
v ZIP Drive
v LS-120/240 Drive
v Wireless LAN
v Memory Test-Full
v Memory Test-Quick
Interactive Tests
v Keyboard
v Video
v Internal Speaker
v Mouse
v Joystick Test
v Diskette
v System Load
v CD-ROM/DVD Test
v Stereo Speaker
v 802.11 Wireless Radio Test
Chapter 2. General descriptions
33