Question about HP Pavilion a450n PC Desktop

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Bad Motherboard The motherboard on my HP a450n died. Is it practical to replace? It was a good computer, with extra memory, video cards, etc. How do I make sure I get one thats compatable? Is it fairly straight forward to remove and replace? Ron

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The motherboard can be a bit tricky if you have no experience.
you will need to spend about $150 on a new board and may have to replace other components too.
It's not very practical as the system uses that last generation of computer components so a new machine would be in your best interest upgrade wise for newer games and media cards.

Posted on Feb 26, 2008

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Extract the Hdd out of your old computer . Place it in a external usb box and connect the box to your new pc . You will be able to access and transfer your data .
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Hi,
This could be an issue with the integrated graphics card( This computer has integrated graphics card) or faulty motherboard.
In order to check he motherboard follow the the steps below:
1)open the computer tower by removing the side panel.
2)Remove all the memory chips(RAM) from the computer.
3)Try to turn the computer on.
4)If it is beeping then the motherboard is fine.
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First thing I would do is try the monitor on another system to see if it's in the monitor or computer. Next would be to fire it up and see if you hear a beep from the motherboard. Most consumer pc's will come with a small speaker that sounds on startup. If you don't hear this beep it could be indicitave of a fried motherboard.

But it sounds to me like your video card or onboard video was messed up when the power supply conked out. If it's onboard video you may be able to switch to a video card. If it's a video card you may need to replace it.

Also check to make sure there are no loose wires, that your video card is seated firmly, and that your connectors are all snug. If none of this works then you're most likely looking at a motherboard replacement.

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Hi there, i assume you switch on the monitor but there's no display. Is the monitor working before this? If what i assume is right, you should check the connection between the monitor and the cpu. If that doesn't solve the problem, then you should check the vga card. Maybe the pci slot/vga port is damage. If that the problem, you should change another display card.

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1 Answer

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Hello kensansom766,
If everything is powering on and your getting no video, most likely the motherboard has gone out. With a agp card present it disables the on-board vga. Does it sound off any beep codes when you cut it on?
First thing i would do is take the memory out just to make the computer beep and acknowledge that there's no memory present, if you don't hear a beep, there another problem, if it does beep however you can assume the motherboards okay and go onto step two. It just might be bad memory too, see if you can replace it with memory from a working computer.
If you've been taking out the video card alot, i would make sure its seeded properly. Then take out some of those cards your not using. 56k modem, sound card, etc. I would also try just the on-board video, too.
Then if your still getting no video, i would remove everything from the board, ide cables, cards, usb controllers and cables, just have the power supply and the wires for the power and reset buttons connected. if you dont get at least the post screen, then its a bad motherboard for sure.
Sorry to type an essay, buts thats how i approch video issues like this. If you don't feel comfortable with doing major surgery like that, please don't. Most likely you can take it to a repair center and at least get a diagnostic, and put the fear of making things worse, in there hands.
Good Luck
CoDoc

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If neither the onboard video and the GeForce video work, the problem may be the Ram. If it has 2 dimms or more, take them out and insert one at a time, powering down/up the computer each time you swap the memory.

I would clear CMOS, just in case.

If that does not do it, I would suspect that the Processor got over heated and is causing the problem. Is the CPU fan working? Is the Power Supply fan working?

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1 Answer

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It's a rather indepth process and is usually just easier to replace the computer.  Motherboards have many different adapters / slots / options.  If you're meaning to replace the motherboard and processor cpu, it'd be best to buy a package deal from newegg / tigerdirect / etc.  To be able to use your other components, you'd have to make sure the new motherboard has the same type memory slots, video card slot, etc.

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Narly


  1. Clean cooling components that have become clogged with dust. If beeping persists, continue to the next step.
  2. Remove a memory module. If the PC stops beeping, the memory module may be bad, is the wrong type of memory for the motherboard, or was not fully seated/connected. Try reseating the memory into the socket to see if a connection was the problem, otherwise replace the module. Remove each memory module, replacing the one that was previously removed. Once all modules have been checked, if beeping persists, continue to the next step.
  3. If your computer has a graphics card, remove it. If the beep code changes or continues with the same beep pattern, the video card may still be good. reseat the video card into its socket and continue to the next step. If the beep code goes away, the video card may be bad. Try reseating the video card, making sure it is fully locked into the connector on the motherboard. If problems persist, replace the card.
  4. Remove a PCI card. If the beep code goes away, the card may be bad. Try reseating the card into its connector on the motherboard. If problems persist, replace the card. Remove each PCI card, replacing the one that was previously removed. Once all cards have been checked, if beeping persists, continue to the next step.
  5. Disconnect hard drives and CD/DVD drive cables (IDE/ATA) from the motherboard socket. If the beep code goes away, the cable or socket is probably bad. Look for bent pins inside the IDE socket on the motherboard and straighten any bent pins. Try reseating the cables into the connectors. If problems persist, the drive itself may be bad and may need to be replaced. Disconnect each drive cable, replacing the one that was previously disconnected, until all have been checked. Once all connections have been checked, if beeping persists, continue to the next step.
  6. At this point, the problem probably involves the motherboard or processor. Make sure any jumpers on the motherboard have not fallen off their pins and into the case. Make sure jumpers are set correctly.

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