Question about HP Pavilion A820n (PP165AA) PC Desktop

2 Answers

Hp pavilion a820n will not turn on, however, the green light on the back is lit

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  • perry_moore Dec 18, 2010

    Could you please tell me the proper procedure for using a jumper wire to test the power on switch on the Hp pavilion a 820n? Thank you

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2 Answers

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  • HP Master
  • 5,660 Answers

Agree,

1) Could be a bad Power Cord

2) Could be that the inside of the computer is dirty. (Power UNPLUGGED from computer. Observe Anti-Static Precautions)

3) Could be a bad Power On switch, or a bad Power Supply.
There is a test to see if it's the switch, or the Power Supply, if you wish to know.

(The Power On switch is located inside the plastic Power On button, in the Front Panel. {HP term > Bezel}

This generic ATX power on switch I have found, fit's many computers,

http://www.directron.com/atxswitch.html )

The test involves bypassing the Power On switch.

IF when bypassing, the Power Supply comes on, the problem is the Power On switch.

IF when bypassing, the Power Supply does Not come on, the problem is the Power Supply.

The test does not directly involve the Power On switch. A jumper wire is used on the 24-pin ATX main power cable's connector,

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00300046&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&lang=en&product=443070

Scroll down the page to the motherboard illustration, and photo.

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

The jumper wire goes from the Green wire, (Soft Power On. Also abbreviated as PS_ON), to ANY Black wire.
ALL Black wires are ground wires.

There is a proper procedure for this, and it does Not involve any splicing, or cutting of wires.

Post in a Comment if you wish to know how.

If the Power Supply is found to be bad, just replace it. YOU yourself can do it.
I can guide you.

Posted on Nov 13, 2010

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  • Contributor
  • 18 Answers

I have the same model computer and had the same issue. There are a couple of things to check out with both being fairly simple. If possible go ahead and replace the power cord just making sure to replace it with a cord of the same specs which could come from another device such as a printer. The next area to check out is inside the case and here you just want to remove any dust build up and make sure to clean the fan at the power supply. To open the case you only need to remove the two thumb screws on the back side opposite the power cord then pull the side towards you and it will pop off. To clean it you can use a can of compressed air to blow it out, there really shouldn't be any need to disconnect or remove anything. This should prevent it from shutting down and not powering up.

Posted on Nov 13, 2010

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