Checking the AC Adapter
Checking the AC Adapter.
If the computer fails only when the AC Adapter is used or if the power-on indicator
of the AC Adapter does not turn on, make sure of the following:
- Power cord is not damaged.
- Power cord is securely connected to the AC Adapter and AC power outlet.
If the above confirmation does not solve the problem, replace the AC Adapter.
If the power-on indicator of the AC Adapter is on, then proceed to the next step.
- Unplug the AC Adapter cable from the computer and measure the output voltage at the plug of the AC
||+19.0 up to +20.5
- If the measured voltage is correct, replace the system board.
- If the problems still persist, go to 'Undetermined Problems'.
- If the voltage is not correct, go to the next step.
- Unplug the AC Adapter cable from the AC power outlet and wait for five minutes or longer
to allow the over-voltage protection circuit of the AC Adapter to be fully discharged and initialized.
- Plug the AC Adapter cable into the AC power outlet.
- Measure the output voltage of the AC Adapter.
- If the voltage is still not correct, replace the AC Adapter.
Note: An audible noise from the AC Adapter does not always indicate a defective adapter.
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