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Sudden Power Loss!!

By Leoric187 ·
I have not used my comp in a month or so. I just hooked things back up yesterday and it originally had trouble stayin on. Eventually after a few cold boots, it stayed on and I played some games. Then after I tried to exit a game, poof it just shutdown. Now, even if I unplug everything only the power light comes on (most times) and the fans wur. For some reason I did get the cpu running once, unknown reasons why, when tested it with other power source for the first time, but now again it doesn't even boot. Just turns on the fans. I'm very novice at IT stuff, and it's a pretty new power supply as well.

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by house In reply to Sudden Power Loss!!

Is the fan on the cpu moving at all? You should open it up and clean it out. If the cpu fan is running below par, the bios is set to shut her down as a safety measure.

It is very possible that the inside of your case looks like the inside of a vacuum machine.

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by house In reply to

Yes, if the speed of the fan is not hitting a certain RPM, then the computer will not start up. Assuming this is a newer machine, this safety measure has been implimented.

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by house In reply to

Also, core temperature is another safety measure that has been introduced. Check your bios settings, although they may not allow alterations in this regard.

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by LiamE In reply to Sudden Power Loss!!

Sounds like the PSU is knackered. Outside chance of it being the motherboard, but get the PSU changed first.

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by tk3423 In reply to Sudden Power Loss!!

I've seen this problem more than a few times. It is either the power supply or the motherboard. Try the power supply first.

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by Leoric187 In reply to Sudden Power Loss!!

All fans are powered. Whats a PSU? It's a new power supply after old one blew. This one i think has a built in surge protect. I took off every (exterally) plugged in item. And removed all power cords to everything (interally) and left it for the night. Turned it on today and the CPU sounded like it was running. Put everything back, turned on the comp .. then the monitor. Blew out my breakers. LMAO. So, I'm thinking that the Power Supply / Other component is just preventing surge and not turning on the system. Very interesting. Gonna have to figure out where to plug in as the house only has 2 grounded outlets (atleast the faceplate )

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by Leoric187 In reply to Sudden Power Loss!!

If the CPU starts to over heat due to lack of effiecient cooling will it auto shutdown ??

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by Igor948 In reply to Sudden Power Loss!!

I've experienced a very similar problem that took me two weeks to figure out. Definitely try the power supply first. You may also want to check your RAM. I had a computer doing a similar thing, and it turned out that I got a defective RAM chip.

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by wy_ho_robin In reply to Sudden Power Loss!!

I have a similar problem and its a faulty PSU causing the trouble but its best if u can check your rams and the CPU fan whether its working fine.
Lastly hope u never blew your chip off.

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by LiamE In reply to Sudden Power Loss!!

PSU = power supply unit

Have you considered have a qualified electrician come and look over your house wiring? It sounds like there are issues there. Everything anyone can suggest will mean nothing if you can get a decent supply from the mains.

Yes, computers can be set to shutdown if the cpu gets too hot. The temp at which it will shut things down is set in the bios. Have a check to make sure this hasnt been set too low if you can get the pc to boot. If you cant and you suspect this is the problem follow the motherboard manufacturers recommendations for wiping the bios and try to boot again. If that hasnt helped, it wasnt the problem!

The problem REALLY sounds like the PSU is iffy. Can you borrow one to rule this problem out?

You say the PSU you have is pretty new - I take it the old one died? New PSU does not guarantee its perfect - I quite often get dead and ropey ones off the shelf.

If you can get a 'known good' PSU and test it on your system and it still has the same issues look to the motherboard next.

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