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

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A520n will not start up

How do I check the power supply to see if it is faulty?

Problem:
The desktop will not start up.
HP said it was the motherboard then said a replacement was not available.
I want to begin solving the problem from the start switch and work back to the motherboard.

If it is the motherboard, any suggestions on where to get a replacement?

Thanks,
Tony

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It defiantely sounds like a motherboard issue, however, if you still want to test the power supply, switches and everything else, check a local radio shack or look on www.newegg.com for the tools to do so. If it does come down to be the mobo that needs replaced, contact me via e-mail and I will give you more info on how to find a compatable board. robert_fawbush@yahoo.com. Subject line motherboard FixYa

Posted on Mar 17, 2008

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Pavillion a520n overheats and reboots. Fan on CPU runs during boot up then shuts off. Starts again when reboot occurs. Suspect thermal sensor not working. Is it in the fan or on the motherboard?


On motherboard. Please, make sure all fans are connected into motherboard.
Some fans can't plug in into the board at all. So, you can ignore those fans.
When you go to Bios to check thermal condition, if a fan is not plug in, you can see 0 degree. 0 degree dosen't cause the shutdown problem. (That's why you can ignore)
Then check which fans are causing problem, first. (If you did and found the problem, go next.)
Replace fans AND clean those dust!
If the problem remains, then replace its case to steel one.

Well, usually a lifetime of CPU fan is pretty longer than others.

Just in case, one more thing, if the thermal condition is OK, then the shutdown problem is caused by something ales!

May 26, 2011 | HP Pavilion A520n (DW233A#ABA) PC Desktop

1 Answer

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

2 Answers

How much total memory will a HP a520n desktop computer hold. One source said max 1 gig yet another source said max 2 gig, which is correct.


Go to crucial.com and have them analyze your computer. They will tell you you can use 2gb, no matter what HP says, and it does work. I just went through the same thing. Saved me from buying a new computer because 1gb wasn't cutting it and I originally thought that was the max for a a520n. Not true. I do suggest going to HP and getting the Bios update from 2005 if you haven't already done that. My a250n runs great with 2gb ram, replacement 500 watt power supply, GeForce 6600gt GPU, and Audigy SE sound card. With optimized paging file and routine disk cleanup this thing still runs well enough to have a few years left in the old girl untill every new program requires dual or quad core 64bit technology and Windows 7 or above.

Mar 03, 2010 | HP Pavilion A520n (DW233A#ABA) PC Desktop

1 Answer

HP Pavilion A520N will not power up. Green light


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!

Nov 17, 2009 | HP Pavilion A520n (DW233A#ABA) PC Desktop

1 Answer

HP Pavillion a520n desktop will not power up. We just moved to a new house and something must have happened during the move. There is a blinking light on the back of the PC. Power button does nothing. Is...


Remove the power first then:

Take the side panel off and make sure that all of the connectors are secure in their sockets

It is possible that the machine was bounced and the power connector from the PSU has come adrift .

Check the wiring from the front panel power on/off switch to the push on connectors on the Motherboard

Go onto www.hp.com and download an installation manual for the machine or look at the Motherboard when you have the cover off and go to their website and do the same thing

Jul 03, 2009 | HP PC Desktops

2 Answers

Power supply replacment


You should be able to replace the power supply. It is usually held in place by 4-6 screws. Unplug the cables on the motherboard and drives. Reconnect the new ones and away you go. A generic supply will be fine if it is of the correct physical size. Bring the old one with you when you go to get the new one.
Dan

Mar 18, 2008 | HP Pavilion A520n (DW233A#ABA) PC Desktop

1 Answer

No power


Most times when this occurrs, there is a problem with the power supply inside the unit. It is possible that the motherboard is not telling the power supply to turn on. Any time the computer is plugged in, the power supply provides 5V as a standby voltage. Pressing the power button sends a signal for the remainder of the power supply to start up. If the 5V supply is not present, no action will occur. Try replacing the power supply.
Dan

Mar 18, 2008 | HP Pavilion A520n (DW233A#ABA) 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

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