Question about HP Pavilion A520n (DW233A#ABA) PC Desktop

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HP Pavilion A520N will not power up. Green light

HP Pavilion A520N will not power up. Green light in back is flashing. Tried several different power sources. Was working fine a few days ago. Any suggestions?

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  • ikkenom May 11, 2010

    Usually, the only green light in the back is where the Ethernet cable connects to the network-adapter. So, unplug the cable, and see if that light goes out. Take a close look at _all_ the capacitors on the motherboard. Capacitors are those small circular "towers", with a silver top, with a cross-etched in the top. Capacitors exist to provide "smooth" voltage to components. Any voltage-fluctuation is just plain bad. The top of each capacitor should be dead-flat. If the top is at all domed, the capacitor is leaking. If there is any red-brown "rust" on top of a capacitor, it is leaking. If it does not power-up far-enough to give one (or more) "beeps", then the likely suspects are: 1. power-supply (you've tried various ones) 2. motherboard 3. CPU (can you swap-in a different one?)

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Which light?? the network light?? Do you get anything when you press the power button if not it is most likely the power supply since the motherborad is still showing power also may be cpu!

Posted on Nov 17, 2009

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The green light on the back is flashing, but when I push the power button nothing happens, any ideas what it could be?


The Green LED light flashing indicates a bad Power Supply. Weak voltage power rail.

http://h10025.www1.hp.com/ewfrf/wc/product?product=404643&lc=en&cc=us&dlc=en&submit.y=7&submit.x=7&lang=en&cc=us

Troubleshooting Power Supply Issues HP Pavilion A520n,

http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph06788&tmp_task=solveCategory&lc=en&dlc=en&cc=us&site=null&lang=en&key=null&product=404643#N207

Click on > Power Supply light is on or flashes

"If the LED is still flashing (it should not flash with all connectors removed), plug the power cable into a different power outlet that is known to be good. If the LED still flashes, the power supply should be replaced."


Cause?
The leading cause is the computer is dirty inside, to include the Power Supply
The next cause is that Electrolytic Capacitors have failed inside the Power Supply.

Solution is to replace the Power Supply.

The Power Supply used is the ATX form factor. The type of Power Supply used in over 80 percent of PC computers out there, and very readily available.

Size of the power supply case is approximately 6 inches Wide, 5-1/2 inches long (5.5), and 3-1/2 inches Tall. (3.5)

It is a 250, or 300 Watt generic unit, probably made by Bestec, Delta, or HiPro.

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00072236&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&lang=en&product=404643

Scroll down to see the illustration and photo of the motherboard.

Power cables needed are;

A) 20-pin ATX main power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

{ ATX power supply's today come with a 20 + 4-pin ATX main power cable.
The power cable can be used as a 20-pin, or a 24-pin.

Add the 4-pin connector to make it a 24-pin, or do not use it, and have a 20-pin }


B) Enough standard 4-pin Peripheral power cables for the IDE (PATA) harddive, {1}, and the optical drive/s.

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

Today's power supply's come with either at least 4, or 6 of these power cables.

C) One Floppy Drive power cable.
Won't be used for a Floppy Disk Drive on your computer. It's power for the Memory Card Reader.

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


All of the above power cables are typical when purchasing an ATX power supply today.
Need guidance in choosing a Power Supply, please state in a Comment.

Regards,
joecoolvette

Nov 30, 2010 | HP Pavilion A520n (DW233A#ABA) PC Desktop

1 Answer

Power problem .... tried 3 different power supply cords...the green light on the rear blinking meaning???? pushed switch on front ...held in.....no response only moved from 1 office to another....always...


was it dropped..?? the indicator light should b solid not flashing.. If you held the power switch in for several min an nothing Try plugging the cord directly into the wall. Do not use power strips as they may have failed.Toggle the voltage regulator switch from 115V to 230V then back again. If you are in North America, this switch must be on 115V. you may have a loose connection in the machine Lastly, you may need to go inside the case and confirm the thin wires running from the front power and reset switches are connected to the motherboard., to check be sure u are grounded an check all connections inside the computer... If the LED is still flashing, the power supply is probably bad.

Apr 28, 2010 | HP Pavilion a350n PC Desktop

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Bestec model atx 250 12z flashes green when hp pavilion a706n is powered on light on back blinks green and pc does not power on even after all cables are disconnected


Try these suggestions:

<a href="http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph06788&cc=us&lc=en&dlc=en&product=427167&dlc=en&lang=en#bph06788_section_2" >Troubleshooting Power Supply Issues</a>

Nov 29, 2009 | HP Pavilion a706n PC Desktop

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Hp wont turn on flashing green light in back an flashing blue light in front.


open your cpu remove the ram clean it put it back your problem will be sloves

Jul 16, 2008 | HP Pavilion a1250n (EG194AA) PC Desktop

1 Answer

Power Outage - PC will not Boot up


nope...you might have lost any combination of these items:

A. Power supply
B. Motherboard
C. uProcessor
D. Memory

This is a good reason why folks use UPS devices. Hope this turns out for you.

Mar 13, 2008 | HP Pavilion A520n (DW233A#ABA) PC Desktop

3 Answers

Black screen when i turn my cpu on hp pavilion a520n


Are you working on battery without connecting the laptop to the mains power ? Please put the laptop on adapter power and recheck. Rajesh

Jul 10, 2007 | HP Pavilion A520n (DW233A#ABA) PC Desktop

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