Question about HP Pavilion a420n PC Desktop

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Want to take apart my hp a420n pavillion desktop

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Hi.. go to this link.. the website will ask u for login user ID and password.. ID = mygoal Pass = 2help..
once in.. go to models on top.. and then enter the model number u provided on next page click option.. PRODUCT SPECIFICATIONS.. then go to the option that says CHASSIS.. click it.. and u will get a Detailed link on how u can take each and every part out of ur computer.. cheers and regards :-P..

Posted on May 05, 2010

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Some suggestions before you start if I may;

1) Your body carries Static electricity. Static will fry out (Short Circuit) the components inside the computer. You probably won't see it, or feel it.

Recommend you follow anti-static precautions.

Computer unplugged from Power;
You can purchase, and wear an ESD wrist strap, and connect the alligator clip to the metal frame of the open computer case,

Touch the metal frame of the open computer case, BEFORE you reach inside, to relieve your body of Static.

Should you get up, and walk away in the middle of working on your computer, upon your return Touch the metal frame again.

All the components, (i.e., Motherboard, Processor, Ram Memory, Graphics card if used, harddrive, etc), are susceptible to static shock, but the Processor is the most susceptible.

This is HP Support, and the main page for the Pavilion a420n Desktop PC,

Left-click on Manuals.
Now Left-click on - Part Replacement Instructions

Upon clicking you may not see anything happening for up to 30 seconds. The file is downloading in the background.
Advise letting the file download all the way before looking through it.

This is a PDF file. You can save it to your computer, whereby you can burn it to a CD disk for easy access. Should you not know how to do this, and wish to, just post in a Comment.

(After you burn it to a CD disk, you can remove it from the computer, and free up harddrive space, also)

The Part Replacement Instructions show, and detail how to;
1) Open the computer case

2) Remove and replace an optical drive (CD/DVD drive)

3) Remove and replace the Power Supply

4) Remove and replace the Harddrive

5) Remove and replace any expansion cards, (Graphics card, sound card, modem, etc)

6) Remove and replace a diskette drive. (Floppy Drive)

7) Remove and replace the Front Panel

What is not detailed is removing the Heatsink/Fan combo, (Processor fan), and the Processor.
[Also a few other details which I will outline below]

The processor is an AMD Athlon or AMD Athlon XP.
Uses a Socket A processor socket, on the motherboard. (Socket A is also referred to as Socket 462)

This page from HP Support is the Motherboard Specifications for the Pavilion a420n,

If you scroll the page down you will be presented with a schematic of the motherboard, and below that a photo of the motherboard.

The motherboard is made by Asus for HP. It's an Asus A7V8X-LA.

This is a PDF motherboard manual for the Asus A7V8X-LA motherboard,

Details where are the cables attach to on the motherboard. (Wires)
Details removing and replacing the Processor.
Details where the Jumpers are.

Especially details where the Front Panel wires go to on the motherboard.

This is on page 18.
(Click on the Zoom In icon at the top (+), and if you zoom to 125 percent, it's easy to see the pins in the Front Panel header on the motherboard)

Should you have any questions regarding this, fire away. Will be happy to answer them.

Posted on May 05, 2010

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i dont claim to be any expert, in fact far from it. our hp paillion came with a restore disc that restores all programs/software that were origionally in the comp and also the extra optional stuff u could download at setup maybe u can get a copy of one from somewhere when ours crashed it was the only thing that got us up n running again

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You almost certainly have a virus. If you can't even get into safe mode the easiest way to fix it is remove the hard drive and back up any files on it with a different computer, then re-install Windows on the original drive.

You can try booting from your Windows XP installation disk and using the recovery console there to repair your installation. That's not too hard and I would say works 30% of the time.

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Is the computer still its power ? if the pc has its power then try to switch on without the memory. if the system beeps means that the mainboard and processor is good. However, if the pc has no power at all then first check the power supply.tell me what happen i give you more troubleshooting.

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Is the pc has blinking power in it. or do your hear any beeping sounds? but anyway you can do check your PC. unplug the pc and open the system. remove and clean the memory and insert it again. and fix all connection inside the pc maybe some cable lessen. after that test the pc. and then tell me what happen i will give you more solution in it. melnavz

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