Gateway P-79, Service Manual

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Replace the system board.
Testing the keyboard or auxiliary input device
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 is connected correctly, run the Keyboard Test.
If the tests detect a keyboard problem, do the following one at a time.
To correct the problem:
1
Reconnect the keyboard cable to the system board.
2
Replace the keyboard.
3
Replace the system board.
The following auxiliary input devices are supported by this notebook:
•
Numeric keypad
•
External keyboard
If any of these devices do not work, reconnect the cable connector and repeat the failing
operation.
Testing the memory
Memory errors can stop your programs, show error messages on the screen, or hang the
system.
To test the memory:
1
Boot from the diagnostics diskette and start the diagnostics program.
2
Run the Memory Test and see if the test completes successfully.
3
Press F2 in the test items.
4
Follow the instructions in the message window.
Testing the power system
To test for a power problem:
•
Turn on the notebook using each of the following power sources:
•
Remove the battery pack, connect the power adapter, then make sure that the
notebook turns on using AC power.
•
Disconnect the power adapter, install a charged battery pack, then make sure
that power is supplied by the battery pack.
If you suspect a power problem, complete the appropriate power supply check:
Important
Disconnect any external keyboards before testing the built-in keyboard.
Important
Do not replace a non-defective FRU.
Important
Make sure that each memory card is fully installed into the connector. A
loose connection can cause an error.