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CHAPTER 4: Troubleshooting
xxvi
Memory Check
Memory errors might stop system operations, 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.
(please refer to main board)
2 Go to the diagnostic memory in the test items.
3 Press F2 in the test items.
4 Follow the instructions in the message window.
Power System Check
To verify the symptom of the problem, power on the computer using each
of the following power sources:
• Remove the battery pack.
• Connect the power adapter and check that power is supplied.
• Disconnect the power adapter and install the charged battery pack;
then check that power is supplied by the battery pack.
If you suspect a power problem, see the appropriate power supply check in
the following list:
• “Check the Power Adapter” on page xxvi.
• “Check the Battery Pack” on page xxvii.
Check the Power Adapter
Unplug the power adapter cable from the notebook and measure the output
voltage at the plug of the power. See the following figure.
• If the voltage is not correct, replace the power adapter.
• If the voltage is within the range, do the following:
• Replace the system board.
• If the problem is not corrected, see “Undetermined Problems” on
page xli.
• If the voltage is not correct, go to see “Check the Battery Pack” on
page xxvii.
• If the power-on indicator does not light up, check the power
adapter’s power cord for correct continuity and installation.
Important
Make sure that the DIMM is fully installed into the connector. A
loose connection can cause an error.
Pin 1: +19 to +20.5V
Pin 2: 0V, Ground