IBM ThinkPad T20 Hardware Maintenance Manual page 36

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 Drive
v Communication
v Wireless LAN(*)
v Memory Test – Full
v Memory Test – Quick
Notes:
v In the Keyboard test in Interactive Tests, the Fn key
is scanned only once. Each key should be held down
for at least 2 seconds; otherwise, it cannot be sensed.
v The sound card is not recognized in the Stereo
Speaker in the Interactive Tests. To test it, use the
audio device test in the Other Devices in
Diagnostics.
v Video Adapter test supports only the LCD display on
ThinkPad. Before running PC-Doctor DOS, detach the
external Monitor.
v To test ZIP Drive or LS-120 Drive, each media is
needed to be inserted before start testing.
v Wireless LAN test and 802.11 Wireless Radio Test is
only for some models. Some models do not have
them.
v To test Digital Signature Chip, the chip must be
enabled and initialized.
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ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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(*)
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