Toshiba A20-S259 - Satellite - Pentium 4 2.66 GHz Maintenance Manual page 130

3 Tests and Diagnostics
If the test ends successfully, OK is displayed. If nothing is
displayed, there may be a problem with the USB port. Check the
wraparound connection and repeat the test.
To check only the USB mouse, follow the procedures below:
Connect the USB mouse to the computer's USB connector.
Next, set up the computer's hardware as follows:
PERIPHERAL
Then, perform the Pointing Stick Diagnostic Test and make sure:
To stop this test, press the two IPS buttons on the computer (connected to PJ10) at
the same time. (You cannot use the USB mouse to stop the test.)
Subtest 08 CD-function key test
When this subtest displays a message shown below, press [MODE] button for 3
seconds to release the key lock.
CAUTION: You cannot continue the test if the key lock is not released.
When this subtest displays messages shown below, press the corresponding CD-
function key.
NOTE: This subtest must be completed within 10 seconds.
3-18
Pointing Devices = Simultaneous
USB Legacy Emulation = Enabled
The cursor moves in the direction that you move the USB mouse.
The display reverses when you click the right button or left button
Press [MODE Control] Button
Press [play/pause] Button
Press [stop] Button
Press [rewind] Button
Press [forward] Button
3.6 Keyboard Test
Satellite A20 Maintenance Manual (960-444)