Acer 4050 User Manual download pdf (Page 61)

Chapter 4 54

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

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

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

T Replace the main board.

T If the problem is not corrected, see “Undetermined Problems” on page 62.

T If 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 DC-IN 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 Power Adapter” on page 54.

Pin 1: 19V

Pin 2: 0V, Ground

1 2 ... 56 57 58 59 60 61 62 63 64 65 66 ... 89 90

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Acer 4050 User Manual Page 61