What is your best guess at this problem?

[Smoke]

System Description:

Abit BE6-II with 512 MB Cas2 SDRAM
Celeron 566 OC to 850 (FSB 100)
20G Maxtor HD
SoundBlaster Live
Matrox Mystique Video

System has been running for a little over a year and a half. A few days ago I noticed the computer started rebooting all on its own. I checked the temps and everything was just fine. Verified that all fans were spinning at proper rate and air was flowing. Upon each boot up SCANDISK would start up automatically. Just a few moments after SCANDISK started the computer would do a reboot all on its own.

Reset the BIOS to run the chip at its nominal 66 MHz / 566 MHz. It booted up and looked like it was running just fine. A few hours later the computer started rebooting itself again. I opened the case and again verified all fans were spinning. I reset the CMOS. I then tried to boot up again but now even though the fans spin right up there is no progress. There is no beep. The hard drive never turns over.

After conferring with WIZ, our best guess was it was a POWER SUPPLY gone bad. I have now tried another POWER SUPPLY (known good) and have gotten the same results.

Thinking somehow the MB may have gotten grounded or shorted I have taken the MB completely out of the case but I still get the same result.

So what do you think?

Bad Motherboard? Or what.

I'd appreciate your best shot on this.

 

[warlord]

try flashing the BIOS. I saw a similar problem on an AMD processor and tried swapping the ps among other things including the proc, flashing fixed the problem.

 

[Smoke]

I get no action beyond the fans spinning. Therefore no floppy available to flash the BIOS.

 

[warlord]

my bad, skimmed a little to fast over that part.

 

[DAPUNISHER]

If you've had that aggressive of an overclock on the Celery for 18months or more, it could be that it's folded. If you have more than 1 stick of ram try switching them out and ofcourse if you haven't reseated the CPU and ram do that as well.

 

[SuperD]

It seems that after you reset CMOS that you went belly up. I think that you have a bad component.
Which one? I'm not going to overspeculate but I've seen this on PCs we have had at work. On a series of PCs with Diamond 56K modems - when the modem went bad, the entire computer went belly up. No Post - fans spinning. Took out the modem and like magic, it spun up. Apparently the card was shorted and caused a motherboard fault - yada, yada yada.

You've been overclocking for a while, despite fans (I love 'em) you still get heat. If you dare. strip the boards out other than RAM and video (even video if you just want to get a POST beep) See what happens. Could be the RAM too - Since scandisk continually rebooted perhaps you have a bad stick.

It's kind of involved, but if you like that stuff to troubleshoot - go after it.

Good Luck.

 

[Smoke]

I have striped the MB down to nada, not even the Video Card. Can't get a beep no matter what I do.

I have only the Floppy and no beep. I'm starting to think I have a motherboard that has given up the ghost. But I'm only guessing because I am a rank amatuer.

Wish I had spare parts laying around so I could do some switching but I've got a bad habit of putting together a working computer whenever I find anything idle sitting around. LOL.

Anyone concur with my guess?

 

[DAPUNISHER]

Well, your down to mobo, CPU, or Case Fan power problems: Try disconnecting any fans except the CPU fan. I have come across two case fans that seemed to work-- they powered up and spun-- but kept me from getting into the bios and from booting sometimes. Don't know why. If this works, then try a different fan or get adapters and plug them directly into the power supply outlets. Good luck!

 

[Smoke]

I appreciate the suggestions. Disconnected the case fan and same result. The Mobo is looking more and more like the culprit.

Thanks for the help.