Question about HP Pavilion A820n (PP165AA) PC Desktop

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Motherboard replace processor cpu i have an hp pavilion a820n tower with no cpu or power supply can u tell me what kind i need?

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  • HP Master
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The processor to fit the mobo is a pentium 4 socket 775. the original was a 3.2G according to the HP website.
most standard 500 watt power supplies should fit.
it does concern me why there is no processor or power supply in it though.
are you sure the mobo is ok? the only reason I would think these parts have been removed is because the mobo is dead and they've been transplanted into something else.

Posted on May 11, 2014

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Posted on Jan 02, 2017

  • 51 Answers

SOURCE: Upgrade HP a1010n Motherboard

Techguru2009: When you upgrade your motherboard, basically you have a new computer. You need to know how your hard/cd drives are connected. Either IDE or SATA. IDE is legacy hardware 80 pin and SATA is the new Thing small connecter. Next is your RAM. There is Dimm, DDR1, DDR2. Find out what your old system was using, or just buy new memory cards, DDR2 is not that expensive. Ask for the manual first read and check what is required, take a list of what your old computer has. I can also help you install everything via chat.

Posted on Feb 24, 2009

antiochpc
  • 1314 Answers

SOURCE: replacing power supply HP M8120N

Here is the link for the upgrade and service guide.

This one is just as easy as 1) removing the side panel; 2) Remove the four screws that hold the power supply into position; 3) Remove the power supply cables from the motherboard (NOTE: If the media bay reader is in the way, you remove the front bezel by pressing the release tabs on the bezel and it will swing open. Remove the one screw securing the bay in position, then slide it forward so you can reach the power cable to the motherboard.); 4) Remove the power supply cables from the hard drives, cd rom drives, and other peripherals inside the PC. 5) Remove power supply...sometimes there is a button to push and it will slide out, sometimes not. 6) Replace power supply, then reverse procedures.

Thanks and please take a moment to rate as fixya.

Posted on Dec 07, 2008

lglalight
  • 1 Answer

SOURCE: computer wont turn on

i had the same problem its going to be your power supply it probably burned out. when i changed mine it worked perfectly.

Posted on Jun 01, 2009

  • 644 Answers

SOURCE: My HP Pavilion a6300f powers up but no signal to the monitor

It could be the motherboard, try resetting the the bios first by either taking the lithium cmos battery out and then replacing after 30 secs or finding the the cmos jumber and unshort it for 30 secs, and reboot the mechine.

If the same and no monitor responce then the onboard graphic electronics may have failed, the motherboard does have a AGP expansion slot which you may want to test with a graphics card to see if that will work.

If you find that you do have to replace the motherboard, try to find one that uses the same processor and memory that you already have, that way you will keep expence down to a minimal.

Replacing the motherboard will mean you will have to contact microsoft to give you the installation codes for the operating system to work with the new motherboard, when you boot for the first time with the new motherboard fitted you will have to phone the number on the screen to reregister the system just follow the instructions, it is quite self explanetry.

Once all booted up and drivers installed the computer should run as normal, as for the hp recovery disks it should still work as all the information on the disk is on the harddrive any way, the only thing you would need to do is keep the motherboard installation disk with all the drivers on.
hope this helps.

Posted on Mar 23, 2010

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  • 389 Answers

SOURCE: how to replace power supply on hp pavilion

I have included a link directly to the upgrade and service manual for your PC. The directions for removing and replacing the power supply are not included. However, there are directions for removing the cover and identifying several parts.

I have replace many power supplies and it does take some attention to detail. I would suggest that you either diagram or put markers on all the cords you unplug from the origian power supply. Generally, the power supply is easy to find and is secured with screws that can be seen on the outside of the case. The power supply will plug into the system board, sometimes in two different places. The power supply also plugs into the hard drive, CD drive, floppy drive (if you have one).
You must be certain that you obtain the correct power supply that is the same as the old one you are replacing.

If you are observant, document carefully and go slow, you should be successful in replacing your power supply.

Here is the link to the manual. It has diagrams and images so you can see what is being described.

http://h10032.www1.hp.com/ctg/Manual/c00877796.pdf

I hope that this is helpful.

Brian

Posted on Dec 24, 2010

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1 Answer

Green light on my power supply stays lit after unplugging


Usually the light will time out after the capacitor has drained. Your machine is getting a bit old , your PSU may be the problem. If you plug it in and push the on/off button and it blinks, fans spin and shuts down, it's most likely the PSU. Look for a in-line fuse on the Motherboard, if blown, replace. Look at the motherboard closely for damaged components, capacitors, etc.

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1) Computer clean inside? Especially processor fan, and finned Heatsink? [FOLLOW Anti-Static Precautions ]

Dust, dirt, hair, food crumbs, lint, etc, on the bottom of the motherboard? You have to remove the motherboard to see.

2) Thermal Paste on top of Processor dried up?
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3) Are the Electrolytic Capacitors in good shape, or bad; on the motherboard?

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Need more specific info? I need the computer name, and model number, (Back of computer next to Windows product key; or up on side of computer tower) Or the motherboard manufacturer name, and model number. Post back in a Comment.

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worked for me on the few computers that wont turn on.

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My hp pc seems to try to start on but then it shuts down immedia.


Hi there.
If its the CPU (processor fan) thats not working, it could well be the machine overheating and shutting down to prevent further damage to the machine, try another fan, if it spins up the CPU fan has gone and will need to be replaced.
If you have a working fan but it doesn't work on the motherboard, check the power supply unit as that could be faulty.

Good luck and thanks for using FixYa!!

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Are there any beeps?
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