Keyboard Or Auxiliary Input Device Checkout - Acer 721TX - TravelMate - PII 333 MHz Service Manual

Keyboard or Auxiliary Input Device Checkout

Remove the external keyboard if the internal keyboard is to be tested.
If the internal keyboard does not work or an unexpected character appears,
make sure that the flexible cable extending from the keyboard is correctly
seated in the connector on the sub card.
If the keyboard cable connection is correct, run the Keyboard Test. See
"Running the Diagnostics" for details.
If the tests detect a keyboard problem, do the following one at a time to
correct the problem. (Do not replace a nondefective FRU):
1. Reseat the keyboard cables.
2. Replace the keyboard.
3. Replace the System board.
The following auxiliary input devices are supported for this computer:
6
Numeric keypad
6
External keyboard (with keyboard/mouse cable)
If any of these devices do not work, reseat the cable connector and repeat
the failing operation.
If the problem does not recur, recheck the connector. If the problem is not
corrected, replace the device and then the System board.
84 Troubleshooting