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.

1.  Unplug the AC Adapter cable from the computer and measure the output voltage at the plug of the AC  Adapter cable.

   Pin	Voltage (Vdc)
   1	+19.0 up to +20.5
   2	Ground

    

   •  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.

2.  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.
3.  Plug the AC Adapter cable into the AC power outlet.
4.  Measure the output voltage of the AC Adapter.
5.  If the voltage is still not correct, replace the AC Adapter.

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