BIOS won't load on my computer

August 27, 2010 at 21:45:30
Specs: Windows Vista, 4Gb
Yesterday, my computer shut off, and when I tried to turn it back on, the BIOS would not load and the moniter was blank. I opened it up, and I'm not really sure what I did but the computer was working again. Today the same thing happened, and no matter what I do it wont turn back on. I tried to reset the BIOS but that didnt work. The computer is about 2 years old and never had any problems before this.

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#1
August 27, 2010 at 22:41:03
What is it about this forum that people almost always fail to provide even a basic description of their system when posting a question?

Is it a brandname system or was it custombuilt?
What exactly happens when you try to startup?
Do any fans spin?
Do you get any POST beeps?

Sudden unexpected shutdowns can be caused by overheating as well as failing powersupplies and a number of other reasons and isolating exactly what went wrong can be a matter of trial & error.

The powersupply is the starting point in diagnosing the problem. If no fans spin when you try to startup it is worth doing a laymans' test on the powersupply.
Turn off mains power or unplug from wall outlet.
Disconnect all PSU cables from motherboard & drives. Take a paperclip and bend into U shape. Insert paperclip into 20/24 pin connector. One end in Green wire and other end in any black. Plug back into wall outlet. Does PSU fan spin? If no then PSU is fried and needs replacement. If fan spins then it may or may not be working properly. Only a proper load tester would determine if each of the voltage rails is putting out the appropriate amount of power. If you have another compatible powersupply of equal/greater capacity then plug it in for testing purposes. Once you determine whether or not the PSU is the problem, can you proceed with further testing. Without a known good PSU you can be needlessly replacing random components.

I had a recent issue with my P4 system randomly shutting down and the problem turned out to be a fault in the 4 pin CPU power connection. The rest of the PSU was OK and it passed the paperclip test. Only when I examined the 4 pin connector did I see the burn damage. It seems the PSU was at it's limit meeting the P4 demand and over time that circuit eventually failed.

In your case an early thought was overheating since you were able to restart after a time. As that is no longer apparently the case it is unlikely you have an overheating issue. A simple failure of the CPU fan can also prevent bootup.
That is another relatively easy thing to check/replace.

Goin' Fishin' (Some day)


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#2
August 27, 2010 at 23:02:17
More info:

Computer is custombuilt
When the computer starts up, Everything seems to work normally, including fans, except the BIOS never load. When it starts normally I hear 2 beeps, but dont get any beeps now.


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#3
August 27, 2010 at 23:15:43
OK. No beeps is a starting point.
Disconnect mains power.
Open the case.
Disconnect power cables from all drives.
Remove all sticks of ram.
Connect mains power and try to startup.
Do you get any beep error?
If yes then ram might be bad. Test one stick at a time.
If no beeps then you are still left with possible PSU failure, possible failed CPU or possible failed motherboard.

Do you have onboard graphics or a plug-in graphics card?

Goin' Fishin' (Some day)


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#4
August 28, 2010 at 00:29:58
Removed the RAM but there was still the same problem. And I just added a new graphics card, but that was about 3 weeks ago. I'll try disconnecting that and trying again in the morning.

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