Question about HP Pavilion 520c PC Desktop

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The battery light on the tower stays on.

This causes a buzzing sound and the computer will not work.

Posted by ldinsmore822 on


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Pull out the pwr cord and press the pwr button for one min and then release. this process is called as power drain. replug the pwr cord at the back of the computer and check. if its works then good or else replace the SMPS the power unit inside the computer. for sure it has gone bad. power unit is easily available in nearby retail outlets.

Posted on May 13, 2010


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On start up i have lights 1 and 3 lit up only and a periodic buzzing noise from inside the tower (every couple of seconds). after about 15 seconds the buzzing stops, the lights stay on and nothing else...

The problem is due loose memory sticks or mismatched memory sticks.
You need to open the computer tower and reseat the memory modules on the machine to fix the issue.

How to do it ? follow the link below

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