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Sparticus
Groupie
Joined: 27/May/2005
Location: United States
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Posts: 88
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   Topic: Computer Help Needed
Posted: 16/June/2006 at 6:47pm |
Hey fellas. My brother is building a new rig and has come across a problem. Unfortunately, I have no idea how to help him out. I was hoping someone might know what is causing the problem, and point us in the right direction for a fix.
Problem: He turns on the computer, runs smooth for about 30 seconds and then all of a sudden it just cuts off. Completely loses power and he has to cut it on again, only for the same thing to happen.
Specs:
AMD Athlon 64 FX 60 Processor
EVGA 7950 1gb vid card
ASUS A8N-SLI Premium Socket 939 NVIDIA nForce4 SLI ATX AMD Motherboard
SILVERSTONE SST-ST75ZF ATX 12V 2.2 & EPS 12V 750W Power Supply 90 - 264V OCP,OVP,SCP,NLO
Any help would be much appreciated. Thanks fellas.
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Fidelio
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Joined: 12/June/2005
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Posted: 16/June/2006 at 7:36pm |
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check to make sure the 4 pin plug to the motherboard by the cpu is plugged in.
check to make sure the power and reset headers are plugged into the motherboard the right way. if one is turned around, switching the ground and hot wire that can happen. check the mobo manual for pin assignments. if you think you have it right, turn it around anyway. this is a common mistake since they're just pins capable of being plugged in backwards and there's little commonality between mobo's which way the labeled side of the plug faces.
if that doesn't work, take out the vid card and unplug everything and leave just the cpu (and cpu fan) plugged in. if it stays up, put the ram back in and try again. try adding 1 piece at a time until you find the one causing it to fail. if you find one causing it to fail make sure it's plugged in correctly, if it is, try a different power lead to that component from the power supply.
also, and this is a longer step to take, if the aforementioned doesn't work, take everything out of the case and assemble the components on a non-conductive surface such as a cardboard box. power it up and see if it stays up. if so then you likely have a screw. standoff, or other piece of metal contacting the mobo where it shouldn't when it's in the case. just make sure every standoff is where it should be under the mobo and you dont have any extras underneath. also make sure you're only putting screws in the 8 or 9 holes specifically there to hold the mobo in the case, no more, no less.
can post more later if none of those works.
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Khemosabe
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Joined: 17/May/2005
Location: United States
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Posted: 17/June/2006 at 12:24am |
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Also make sure you've got adequate thermal grease between the CPU and its heatsink, 30s is about the time the CPU could take to reach its thermal trip point which would shut down the system.
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solitary00
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Joined: 17/May/2005
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Posted: 17/June/2006 at 12:27am |
Originally posted by Khemosabe
Also make sure you've got adequate thermal grease between the CPU and its heatsink, 30s is about the time the CPU could take to reach its thermal trip point which would shut down the system. FYI Spart, you should be able to monitor the CPU temp and it's safety threshold in the BIOS if this is something you wanted to check before pulling the HSF.
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Goffin
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Posted: 17/June/2006 at 11:13am |
my guess...Bad power supply.
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Ball punching for Teh Win!
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Xenetic
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Joined: 15/June/2005
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Posted: 18/June/2006 at 5:17am |
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I have had that happen, not exactly, but similar. Power supply just wasnt able to push my hardware, so it just gave up.
FYI: In most cases 500w doesn't = 500w
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Fidelio
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Posted: 18/June/2006 at 8:38pm |
Guys, the power supply he has is bad ass and should be able to pump ANYTHING he puts in that case. It's $200 power supply. http://www.newegg.com/Product/Product.asp?Item=N82E168172560 06
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Preach
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American Hero
Joined: 19/May/2005
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Posted: 18/June/2006 at 9:01pm |
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I agree that the power supply should not have any problems in theory, but maybe he got a lemon. I would try a different power supply and see if the same thing happens.
It might also be a RAM compatability issue w/ the motherboard. I would check to make sure they are compatible with eachother. If there are two sticks of RAM try using them one at a time to isolate a possible RAM problem.
If you have another socket 939 CPU I would try that also in the motherboard as a last resort.
It definately sounds like some sort of power issue though; bad PSU, might be shorting out to the case... check the screws mounting the mobo etc.
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Xenetic
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Posted: 19/June/2006 at 12:42pm |
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May seem rediculous, but I have seen some "haunted cases". Couldnt figure out the prob, switched the case and it worked.
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Goffin
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Posted: 19/June/2006 at 1:12pm |
Not saying the power supply won't suffice. I'm saying the sucker can be bad from the start. :D
my 2 cents
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Ball punching for Teh Win!
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