Flash Memory Update:
A flash memory update is
required for the following conditions:
New versions of system programs.
New features or options are added.
To update the flash memory, do the following:
1. Get the appropriate diskette containing the update.
2. Insert the System Program Service Diskette into
drive A and power on the computer.
3. Select Update system programs from the menu.
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 268.
2. If FRU code 10 appears, replace the system board.
3. Rerun the test to verify the fix.
If above procedure does not correct the problem, go to
“Undetermined Problems” on page 290.
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 system board.
If the keyboard cable connection is correct, run the
Keyboard Test by doing the following:
1. Go to the diagnostic menu screen by pressing Ctrl+A
in the Easy-Setup screen.
2. Press Ctrl+K; a layout of the keyboard appears on
the screen.
3. 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.
If the tests detect a keyboard problem, do the following
one at a time to correct the problem. Do not replace a
non-defective FRU.
Reseat the keyboard cable.
Replace the keyboard.
270 IBM Mobile Systems - ThinkPad HMM Volume 3