Keyboard and Auxiliary Input Device

Checkout

Note: Remove the external keyboard if the internal key- board 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 con- nector.

If the keyboard cable connection is correct, run the Key- board Test.

1.Boot from and start PC Doctor. (See “PC Doctor System Diagnostics” on page 51 for details.)

2.SelectInteractive Tests .

3.SelectKeyboard .

4. Follow the instructions in the message window.

If the test detects a keyboard problem, do the following one at a time to correct the problem. Do not replace a non- defective FRU.

1.Replace the keyboard.

2.Replace the system board.

The following auxiliary input devices are supported for this computer:

ŸNumeric keypad

Ÿ Mouse (PS/2 compatible)

ŸExternal keyboard (with keyboard/mouse cable)

If any of these devices do not work, reseat the cable con- nector and repeat the failing operation.

If the problem does not reoccur, replace the device and then the system board.

30 ThinkPad 390E

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IBM 390E manual Keyboard and Auxiliary Input Device Checkout, SelectInteractive Tests SelectKeyboard