pc shutdown on its own and wont turn back on.

[JerseyDriverSS]

As the title says. My first thought is my psu kicked the bucket. Could it be anything else or should i just get the warranty process started. Its a capstone 80 plus gold 650w, so its not like it was a cheapie. Kinda stinks it only lasted 6 months.

 

[Jrichmond0826]

it could be alot of things heat sink failure (due overheating) cpu system failure (what happend to my 6 core) check the power supply also

 

[Sharky.]

Heatsink failure (not that there even is such a thing...) won't prevent a computer from powering on.

Likely to be power supply or motherboard failure, the latter of which can be caused by the former, eg through the PSU frying the board. Reset the CMOS - yank the battery on the motherboard, wait a minute or so, reinsert battery - and see if it POSTs. If not, (safely!) check the power supply output with a multimeter/PSU tester; if the PSU itself is fine then the motherboard has in all likelihood given up the ghost.

 

[Grayfox]

Heatsinks should never "fail".

If you put the right amount of TIM on the CPU and mounted the heatsink correctly.
It should last years before any issues start occurring

 

[BobK]

Make sure it's plugged in properly, especially where the line cord plugs into the PSU, and check that the outlet is working properly; plug a lamp or some such into it to test.

 

[JerseyDriverSS]

I've tried everything psu related and think it may be a fried motherboard. My pedals started acting up yesterday and thought the pcb went bad on them (but know i think it was motherboard related on its way out. Long story short is i touched the case got shocked and this is when it shutoff and wouldn't restart. I put this pc together myself about 7 months ago and all was working fine until i got shocked. Putting it together was simple, but diagnosing a problem is beyond me.

 

[DQuaN]

The motherboard may have earthed on to the case. Check the mounts.

 

[JerseyDriverSS]

Figured it out. Its a faulty hard drive.

 

[BobK]

A faulty hard drive keeping it from powering up? Wow, that's pretty bizarre.

 

[DQuaN]

Very bizarre.

 

[JerseyDriverSS]

Very bizarre.

Well i may have actually jumped the gun on my harddrive diagnosis. I put a new power supply in and it still wouldn't turn on. Tried the old power supply again with the hd uplugged and it fired on. So i started from scratch again and rerouted my wires all pretty took it off my bench and hooked to the monitor. All was plugged in correctly including the hd i thought was suspect and it turned on, but i got no signal going to my monitor now. I am completely stumped now, not that i wasn't before. Diagnosing and troubleshooting is way beyond me compared to just putting it together. I'm gonna try the new power supply again tonight and see what happens.

 

[DQuaN]

How do the capacitors on the board look? Are any of them bulging at the top?

 

[JerseyDriverSS]

How do the capacitors on the board look? Are any of them bulging at the top?

Evertything on the board looks fine like the day i put it in. Could my powersupply be partially bad even though it spins the case fan at processor fan and full speed (at least it looks like there full speed). I figure i'll try the new power supply tonight. I've got the battery out of the board all day while i'm at work. Like i said i'm stumped to the point of if i don't get it fixed soon i'm just gonna start from scratch and build something better.

 

[Sureboss]

I'd still say it's a fried board, when you unplugged the hard drive and plugged it back in and it worked, did you use the same SATA port on the motherboard and the same power connector from your power supply?

A power supply can part fail, you could have either a dead SATA port or a dead connector from your PSU (or both), one could have knocked the other out.

 

[starknight97]

I think hard drives can cause issues that seem to be related to psu or main bored issues. Once I tried to install a hard drive in a PC with one of the pins bent on a IDE hdd ( I did not know at the time) and it didn't post. Try another hard drive and see if it works.

 

[Grayfox]

I think hard drives can cause issues that seem to be related to psu or main bored issues. Once I tried to install a hard drive in a PC with one of the pins bent ( I did not know at the time) and it didn't post. Try another hard drive and see if it works.

SATA doesn't have pins.
It had tabs that mate with the sata molex connector.

PATA had the 40pins.

Test the PSU outside the PC by getting a paperclip and inserting it into the green wire and any black wire.
This will jumpstart that PSU under a 0 load, if it spins up it is less likely to be the PSU.

 

[starknight97]

I'm not saying it has to have to have pins to cause a fault (I know sata don't have pins everyone does) I was suggesting the hard drive may be preventing post. I don't think its the PSU because you said it works when you remove the hard drive and it still had the same issue with the possibly 'broken' hard drive when you put the new one in.

 

[DQuaN]

SATA doesn't have pins.
It had tabs that mate with the sata molex connector.

PATA had the 40pins.

Test the PSU outside the PC by getting a paperclip and inserting it into the green wire and any black wire.
This will jumpstart that PSU under a 0 load, if it spins up it is less likely to be the PSU.

Isn't that a bit risky for a novice?

 

[JerseyDriverSS]

Isn't that a bit risky for a novice?

LOL i'm not trying to electricute myself. But, i will try all suggestions tonight when i get home.

 

[Grayfox]

Isn't that a bit risky for a novice?

The green wire has about + 5v on it.

A paper clips works well just keep the PSU unplugged then plug it in to the wall.
Make sure it is not plugged into the PC.

 

[JerseyDriverSS]

Problem solved and I should have done this yesterday but I guess I didn't wanna face the outcome. Threw my old graphics card and it fires right up. Guess a 780 would be justified to the fiance now. Well see how that goes.

 

[Sureboss]

Unusual for it to not even boot with a dead GPU. My dead cards have always booted, glad you found the problem out though.

 

[JerseyDriverSS]

Ended up getting a 770 to replace my faulty 660ti. At least evga is warranting it. I'll throw it on ebay and get some money back I spent on the new card.