Acer 7520, 7220 manual Check the Power Adapter

Check the Power Adapter

Unplug the power adapter cable from the computer and measure the output voltage at the plug of the power adapter cable. See the following figure:

Pin 1: +19 to +20.5V

Pin 2: 0V, Ground

1.If the voltage is not correct, replace the power adapter.

2.If the voltage is within the range, do the following:

qReplace the System board.

qIf the problem is not corrected, see “Undetermined Problems” on page 92.

qIf the voltage is not correct, go to the next step.

NOTE: An audible noise from the power adapter does not always indicate a defect.

3.If the power-on indicator does not light up, check the power cord of the power adapter for correct continuity and installation.

4.If the operational charge does not work, see “Check the Battery Pack” on page 79.

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