CHAPTER 4: Troubleshooting
Memory Check
Memory errors might stop system operations, show error messages on the screen, or hang the system.
To test the memory:
1Boot from the diagnostics diskette and start the diagnostics program. (please refer to main board)
2Go to the diagnostic memory in the test items.
3Press F2 in the test items.
4Follow the instructions in the message window.
Important
Make sure that the DIMM is fully installed into the connector. A loose connection can cause an error.
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.
Pin 1: +19 to +20.5V
Pin 2: 0V, Ground
•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
