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PC won't power up

post #1 of 21
Thread Starter 
So I was doing some overclocking yesterday and it suddenly shutdown and will not power up. Specifications are in the signature. Here are the tests that I did:

  1. Replaced CPU (Didn't work)
  2. Replaced RAM (Didn't work)
  3. Removed everything else (Didn't work)
  4. Reset CMOS (Didn't work)
  5. Jump start with a screwdriver (Didn't work)
  6. Did PSU test by connecting the green wire and black wire with a paper clip (PSU powers on)

What happens is that there is a fraction of a second of power before everything dies. After all these test I reckon it's the motherboard but the LED is still on. Is there anything else I can check? Thanks.
Edited by leekaiwei - 3/23/13 at 7:49am
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Gaming Beast
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post #2 of 21
Try another psu, the test on the psu you tryed does no prove anything
post #3 of 21
Thread Starter 
Quote:
Originally Posted by xplode-bg View Post

Try another psu, the test on the psu you tryed does no prove anything

Unfortunately I don't have a spare PSU lying around. Out of curiosity, what does that PSU test actually do then?
Edited by leekaiwei - 3/23/13 at 7:55am
Gaming Beast
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Gaming Beast
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post #4 of 21
Well can you borrow for test only from a friend
post #5 of 21
Thread Starter 
Quote:
Originally Posted by xplode-bg View Post

Well can you borrow for test only from a friend

Hmm suppose I could. I will update you on that.
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Gaming Beast
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post #6 of 21
Quote:
Originally Posted by xplode-bg View Post

Try another psu, the test on the psu you tryed does no prove anything

Can you explain to me why this proves nothing? (I'm curious to the reason) That's what I normally do to test PSU's too.

I think he/she's done everything in the book correctly, everything I would do. The only other thing I would do is pull everything apart, (pull it out of the case) and start adding component by component.

e.g. First run the MB w/ PSU and CPU on the desk, with no RAM. and see if it powers on, at all, then add RAM and power it on etc..
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post #7 of 21
Quote:
Originally Posted by intekmdma View Post

Can you explain to me why this proves nothing? (I'm curious to the reason) That's what I normally do to test PSU's too.

I think he/she's done everything in the book correctly, everything I would do. The only other thing I would do is pull everything apart, (pull it out of the case) and start adding component by component.

e.g. First run the MB w/ PSU and CPU on the desk, with no RAM. and see if it powers on, at all, then add RAM and power it on etc..

A PSU might start up, but if it can only deliver power on a 5V rail then the only thing it's going to do is light up some LED's.
post #8 of 21
Thread Starter 
Quote:
Originally Posted by intekmdma View Post

Can you explain to me why this proves nothing? (I'm curious to the reason) That's what I normally do to test PSU's too.

I think he/she's done everything in the book correctly, everything I would do. The only other thing I would do is pull everything apart, (pull it out of the case) and start adding component by component.

e.g. First run the MB w/ PSU and CPU on the desk, with no RAM. and see if it powers on, at all, then add RAM and power it on etc..

Didn't work. The PSU fan just twitched.
Gaming Beast
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Gaming Beast
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Samsung 840 Western Digital Caviar Green Seagate Barracuda LiteOn IHAS124-14 24x SATA Internal DVD-RW / DV... 
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Windows 8.1 22" Samsung S22A200B Widescreen LED Monitor Iiyama PLX436S 17" Microsoft SIdewinder X4 
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i7 4700HQ MSI MS-16H2 Intel(R) HD Graphics 4600 Microsoft Windows 8.1 
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post #9 of 21
Known good ram, cpu, psu, and nothing else plugged in should isolate the mobo.
post #10 of 21
I suspect PSU. They might turn on but as soon as any amount of current is drawn through a busted area, it could shutdown for a number of reasons. I have a cheapo 400W that has a bad area in it. IN an old rig, when the DVD burner and HDD would use spin up at the same time, the rig would restart.

Did I see CM 450W a minute ago? Low end CM models aren't very good in reviews, often their output is over rated(might only be 350W but labeled as 450W...), and their voltage is dirty (varies quite a bit from spec)
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