Checking the AC Adapter

Checking the AC Adapter

You are here because the computer fails only when the AC Adapter is used.

If the power problem occurs only when the port replicator is used, replace the replicator.
If the power-on indicator does not turn on, check the power cord of the AC Adapter for correct continuity and installation.
If the operational charge does not work, go to 'Checking Operational Charging'

NOTE: There are two types of adapters. The procedure for checking both types is the same.

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 to +21.0 2 Ground
- If the voltage is correct, replace the system board. If the problem is not corrected, 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 five minutes or longer to allow the over voltage protection circuit 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.

Pin	Voltage (Vdc)
1	+19.0 to +21.0
2	Ground

NOTE: An audible noise from the AC Adapter does not always indicate a defective adapter.

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