I ws wondering if there's anyone out there who could help me with a prob I'm having... A mate brought me a pc that he'd been building which, on boot, went to a constant, alternating high/low beep. The mobo, by the way, is a Gigabyte BX2000 Dual BIOS job. Anyway, went and looked up the codes for Award BIOS and it said CPU shagged or overheating. I find this unlikely as it's booting from cold and hasn't previously been switched on for about a year. Anyway, I decided to just replace the mobo and CPU with one of mine, a Gigabyte GA71x with Athlon proc. Same problem. I find this very hard to believe, yet Award insists that these are their only valid codes. I know that my mobo and chip work fine because they were my main machine which I recently upgraded, the only different thing is the case!

Any ideas would be greatly appreciated.

Try another power-supply, the current one may be too weak

Also check voltage settings for CPU, RAM, and AGP. I am not sure if that particular board supports hardware voltage adjustments, but make sure they are cool first.

Thanks guys have tested PSU - only 10.2v on 12v however, replacement made no difference Have triple-checked all mobo settings and all is a-ok, so any other ideas you may have would also be great

It sounds a bit mysterious. Have you tried to swap the video-card/audio-card/network-card etc.?

How does a barebone system work (just mobo, floppy, graphics card and keyboard, no HD or CD)?
Can you start up from let's say a win98-bootdiskette?

It is very mysterious - totally pickled my head!

Swapped out all components with known-good - same prob.

The result is the same, from a full system right down to just mobo and RAM!

Nothing on screen so even booting from floppy yields no joy

If you have done everything suggested in this thread so far, then your mobo is the problem.
Having read over everything you've said, and everything that others have suggested, it looks like the mobo is the only thing left.

Hmmm I would love to agree with you wholeheartedly but how can two different boards with two different CPU's have the same problem?

So confusing! I will try with the last spare board I've got, thanks for the advice

Sorry if I'm slow, but did you test with another PSU, or just different mobo/cpu's?

If so, are you sure the PSU can handle the load?

The case itself has now had a different PSU at 350w, a new CPU and a new mobo.

I would certainly hope that a 350w PSU could handle a basic system (mobo, chip, RAM, HDD, FDD and CDROM)!

So as you can probably see, I'm really, really puzzled and stuck! *frowns* Thanks for all your help though

Ok.
Have you tested running it with only mobo, cpu, ram and vid.card? No FDD, HDD or CD-ROM? Just to see if you can access the BIOS...
If it suddenly springs to life then, you know that you've got a lousy PSU, and need a new one...

Also, you said the only diff is the case... Are every cable connected? Nothing left out that should be grounding the mobo? I had similar problems when trying to start a 'puter without it being in a case...

When I finally caved in and connected everything, it worked like a charm (as it had finally become grounded)...

Lastly, you sure your friend didn't include one spacer too much, which is shorting something out? A bit farfetced I know, but still worth making sure when you're allready messsing around in there...

Hope some of this helps

I had a problem like that and it turned out I had one stand off to many and it eventually shorted out the MOBO so just look and see that all the holes line up and there isnt an extra standoff

Hmmm interesting idea guys, thanks - I'll try that one out later

MrGaribaldi - It's been all the way from having a complete system to only mobo, chip and RAM with the same problem

Sorry, but just wanted to make sure...

Could you please post complete specs of the 'puter (along with what mobo and cpu you switched it with)

Just to recap..

After putting together a new system, when you hit the powerbutton, it starts beeping...
And what does it beep? (Just to tripple check that you've decoded it correctly)

1. All fans are spinning
2. The LED's light up
3. It doesn't give you the BIOS screen (or any other screen)
4. You've tried with different ram, cpu, motherboard, etc.
5. You've tried with a different PSU...
6. You've reset the BIOS on the motherboard(s) used, and put the jumper back to the original position...
7. You've set the dipswitch to the correct Mhz..
8. You've reseated every component
   [/list=1]
   You can't access the BIOS, which leaves changing boot drives & such a moot point...
   
   • Does the mobo/cpu (yours) work in another machine, or has it too died?
   • Does the ram work in another machine? (if compatible)
   • Does the graphics card work in another machine)
   
   Dunno how applicable the ram is, as the original mobo doesn't support DDR, whereas I think yours does (though I couldn't find out exactly what mobo you used)
   
   I hope for your sake that the interesting idea worked, if not, please confirm/deny if all of the above points are correct and we'll keep trying...