PC totaly dead, coupld it be power switch.

funkytwig

Distinguished
Dec 13, 2006
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Hi, my PC has been playing up for a bit. When I press power switch nothing happend, totally dead. I fiddles about with it for a bit, turning it off, unplugging it, waiting for half an hour before plunging it back in. Eventually it decided to work.

I used it for a few days turning it off a few times and then it happened again. Did a lot of fiddling and ended up removing a firewire and blackmagic video card. This seemed to do the trick so figured it was a duff card.

Then a few days later it happened again. This time removing and reinserting graphics card seemed to do the trick.

Finally it happened again, now nothing gets it working. I tried unplugging graphics card and using inbuilt, still no joy. finally I removed all the memory, and with no memory or any other cards it is still dead.

I am now trying to work out what to do next. Was wondering what people think. Is it the PSU, could it be the CPU, or the motherboard. Was also thinking it may be the power button, was thinking of getting a new one and trying this.

All advice more than welcome.

Ben
 

InvalidError

Titan
Moderator
The most likely suspect when PCs start having trouble with randomly shutting down and then failing to turn back on is the PSU. Unless you specifically picked a quality PSU or bought it from a shop that uses high-end components, there is a ~90% chance that you have a piece of crap powering your system.

It would help if you said what brand and model PSU you have along with the rest of your system specs.
 

InvalidError

Titan
Moderator

Most "calculators" are pointless since most of them use the manufacturers' grossly inflated recommendation and fail to account for PSU quality.

Even high-end single-GPU Intel-based systems rarely use more than 350W so "power calculation" is mostly unnecessary unless using an outlandish setup and people for who this applies should know who they are. For the rest, a quality 550+W unit is vastly sufficient.
 

funkytwig

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Dec 13, 2006
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It did not start randomly shutting down, just would not start up. It was a good quality PSU but is quite old. Think it was around £80 for a 450. There may not of been much headroom but I was building a quiet PC. Think I am just going to buy a new one, think I will go for a 550.

Ben
 

leigh76

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Jan 27, 2009
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Pointless discussion without knowing components.
You could buy a 550 only to discover that you need a 750 ?
However INVALID is correct also, people who need 750+ power etc will know.

And dont discount the hopeful option, maybe it is the power button............