computer shutting down without warning

[SubZer0]

today I was just watching TV and the computer just randomly shut down and restarted itself without warning. no blue screen, no nothing at all! I had to go to work so I thought it was no problem really... so I come back tonight and it's been doing it over and over again. it does it randomly without warning or any pattern that I can notice.

another thing I notice is that the restart button doesn't work anymore. the power yes, of course. even on the motherboard itself the restart button doesn't work but the power does. P6T DELUXE mobo...

never had any problems with any of the hardware until just today.

specs are in the sig.

please let me know if you need more info or if you anything about this. I'm going to run a memtest to see if it's the memory but I'm thinking it's the motherboard.

sorry to bother anyone here with this issue..

thanks in advance for any help

Andy

[SubZer0]

I forgot to mention, at first I thought it might have been the OC and that the voltage was too low (it's been getting warm lately around here) so I reset everything back to default on the BIOS and it still did it. tried again with the OC and still.... back to default and still does it so it's not the OC.

the HDD that I have the OS on is pretty old. SATA 250GB 7200rpm but it's ooold. FSX is on the new drive. could the drive be it?

[NickN]

Follow the power scheme first

either

a. power glitch in house current

b. bad power strip, device, cord from wall to PSU

c. defective PSU

d. defective tower switch shorting periodically

e. defective motherboard


Other than that, defective memory or CPU... however just rebooting out of the blue usually indicates a power related problem. Typically if a HDD, memory or CPU problem that bad was coming up it would probably not reboot.. but its still possible

[SubZer0]

thanks for the response Nick. what leads me to believe that it's a bad mobo is that its own reset button (the one on the board itself... as the p6t was made) doesn't even work. I checked the power connectors to the motherboard, the 4pin and the 24pin and the 24 pin was a bit loose but that didn't change aything. I took out the RAM and put it back in just to make sure... took out the motherboard's battery for a bit... none of that worked.

to tell you the truth I've had a minor issue with the system since I got it. every once in a while when I start it up from cold, it'll turn on but on the monitor it'll say it has no signal and the cpu fan keeps spinning really loud (I know it boots fine when it slows down to normal speed). so what I do when it doesn't boot right is I just press the restart button on the computer and it boots fine then. but now it's just randomly turning off..

I hope this bit of additional info can help anyone in determining anything here..

I'm going to give ASUS a call today and see if they can do anything for me.

thanks for the help,

Andy

[SubZer0]

I just RMA'd the mobo... should I do the power supply too just in case? I'm at  a friend's house right now testing it on his system... q6600 clocked with sound card and running 9800gt SLI... running fine so far...

[NickN]

If it does not power down in the time the other board did I think its safe to assume the PSU is fine

[SubZer0]

Hey Nick,

unfortunately the test I ran at my friend's house wasn't as extensive as I'd hoped it'd be. he was already busy installing his new sound card and his room is a complete disaster, but under my power supply his system did power on and POST just fine.

I talked to an Asus tech and I told them about how the motherboard wouldn't POST 100% of the time since I got it and he said that that's a sign of a failing power supply. they are RMAing it for me and I'm working on getting in contact with PC Power&Cooling to RMA the power supply just in case.

another thing I found weird about that P6T Deluxe is that it never beeped for errors... even if I took out the RAM or anything.. literally I have never heard a sound from that motherboard... hmmm

thanks,

Andy

[NickN]

sounds like a defective motherboard Andy

[SubZer0]

yea, I knew I should have checked on that sooner... oh well. now the wait for the new one begins. thankfully my dad has an old, old system he's not using so I have something to do schoolwork with. and if it wasn't for this weekend's trip to Disney with the girlfriend, it would go buy much slower

[Wingo]

About the beeping, the P6T doesn't have a speaker on it so thus wont beep on error. You need to install your own for the error beeps.

[SubZer0]

well, I got my new mobo in today and it's set up (not in the case though). it POSTed just fine from the start. I'm at work right now and I left it running Prime95 on stock settings to see if that goes well. luckily it seems that the power supply wasn't the problem