Lenovo ThinkPad 380ED ThinkPad 380, 385, 560, 560E, all 760, 765 and SelectADo - Page 43

System Board Checkout The processing functions are performed by the system board. When a numeric code calls the system board as a FRU, use the following procedure to isolate the problem. 1. Run the system board test to verify the symptom. This test verifies the system board. If no error is detected, return to "Checkout Guide" on page 29. 2. If FRU code 10 appears, replace the system board. 3. Rerun the test to verify the fix. If this procedure does not correct the problem, go to "Undetermined Problems" on page 51. Keyboard/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 subcard. If the keyboard cable connection is correct, run the keyboard test by doing the following: 1. Go to the diagnostic menu screen by selecting Test in the Easy-Setup screen. 2. Press Ctrl+A. The ThinkPad FRU Connections screen appears. (If the Ctrl+A does not work, triple-click on the icon on the right bottom corner on the basic diagnostic screen.) 3. Make sure that the keyboard connection is Connected; then press Esc to escape the screen. 4. A layout of the keyboard appears on the screen. Check that when each key is pressed, the key's position on the keyboard layout on the screen changes to a black square. Note: When a Fn key is pressed, a black square briefly appears. 5. Press Ctrl+Pause to end the test. If the tests detect a keyboard problem, do the following one at a time to correct the problem. Do not replace a nondefective FRU. Reseat the keyboard flexible cable. Replace the keyboard assembly. Replace the subcard. Replace the system board. The following auxiliary input devices are supported for this computer: Numeric keypad Mouse (PS/2 compatible) External keyboard (with keyboard/mouse cable) ThinkPad 380, 385 (2635) 31