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PSU troubles

post #1 of 11
Thread Starter 
Hey guys, I'm in a bit of a predicament at the moment and not sure what to do. The issue I'm having is not on my sig rig but my moms desktop that we bought from Fry's Electronics. It all started when one day the computer got shut down (properly) and then would not boot back up (no lights or anything). So I instantly assumed that it was the PSU that was to blame. I switched out the stock PSU for a Raidmax 420W factory PSU and everything worked great for about a week then the same thing happened. The computer will not turn on again and my guess is that the PSU is toast. The only spare PSU that I have left cost me $100 and I dont want to risk frying that one before I figure out what is going on.

Any ideas?

Could a failing component (ie. internal - motherboard or external - surge protector) cause a power supply to go out in a such a short amount of time?
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post #2 of 11
C&P from www.advicenators.com

1. I'd make 100% sure the old supply is indeed bad; I'd try installing it in another case and see whats up if you can. If its another problem (loose wiring/connection for example), you might just be replacing supplies whenever a connection/socket/whatever goes 'wonky'. Kind of like a hot-socket. If you kept the old supplies (long shot I know) I'd try them as well, to make sure they dont work just fine in another case with different wiring, etc.

2. Hopefully you are buying quality supplies. If you are, it is indeed unusual to have this keep happening. I would call the manufacturers of the supplies and pick their brains. If it is something integral to your system (bad cooling, bad position in case, etc) I would think they might be able to point you in the right direction. I'd also be suspicious of the supplies being a problem, if you havent noticed either excessive heat or obvious damage to the supplies (or the particular smell, you'd likely know it if you smelled it).

3. I had the power button go out in a cheap system I had. If you are electrically inclined you can look at it yourself. That, or call the manufacturer of your system and have them help you troubleshoot so hopefully you dont buy a 4th supply if that isnt the problem.

4. Do you have problems with other appliances? Lighting problems? There of course can be external causes too, whether in your house wiring or in the power supplied to your house. As an electrician, I've seen everything from outlet problems (loose/broken/miswired/old/melted) to the wiring itself, and rarely there has been suspected voltage supply problems to the house. If you live in an old house, or an apartment this could be the problem, but thats only a guess. You could try calling your power company and asking if there is any problems but I've only ever gotten denials myself. If there is an intermittent power problem often no one can troubleshoot unless they get lucky and catch it happening ("Looks fine to me" syndrome). You can buy testers for duplex receptacles (like at home depot) that when you plug them into an oulet, they will simply tell you if there is a ground or other problem w/o having to know really what your doing (though you can do this with a multimeter/wiggy if you are experienced). Check to see if the outlet is loose or cracked, replace (or tighten) it if it is.

5. Get a surge protector if you want. Get guality, the ones you get from walmart/target/etc ARE NOT. They are simply glorified outlet extensions, and when they fail, they fail open - they arent usually designed to break the cicuit. I've seen these in houses that have been struck by lightening twice, and everything they were supposed to protect blew out. They just melted. If money isnt an issue, get an electrician to come out. They can look at the circuit to see if there is anything obviously wrong, and either install a surge breaker or a smaller panel to protect multiple circuits. I know Eaton/Cutler-Hammer has surge breakers, but who knows what you have in you basement (or wherever lol).
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post #3 of 11
Thread Starter 
Thanks for the very detailed response. I will look at all of those.

I'm fairly certain its not my house wiring since my rig is completely fine. The power button could very well be the culprit, I will check as soon as I get home. And of course I'll check the old PSU (the one i havent thrown out ) to see if its actually dead.

These PSU's that were in it are by no means good or even great PSU's. They both came stock in their cases but to have them both fail within such a short time is just weird.
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T3k
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post #4 of 11
Rusky that raidmax is junk and it probably did die. Who made the first one?
post #5 of 11
Thread Starter 
yea they are junk but are still better than the no brand (i think) psu that came with the computer. I'll double check once i get home from work today.
T3k
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T3k
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The Tibaldi
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post #6 of 11
It may well be a problem with your electric supply that your Corsair is coping with, but it's killing the cheap trash on your mom's machine.
Hrm, June, San Diego... Let me guess here, probably a wild stab in the dark... but did you turn on your AirCon system a week or so before these problems started?
It may well be the power spikes from you aircon switching itself on and off are enough to slowly kill the filtering caps in the PSUs. Get some decent surge protection on your machine and your mom's then buy her a Corsair VX400w and watch in excitement and anticipation as it fails to explode!
    
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post #7 of 11
Thread Starter 
Quote:
Originally Posted by allikat View Post
It may well be a problem with your electric supply that your Corsair is coping with, but it's killing the cheap trash on your mom's machine.
Hrm, June, San Diego... Let me guess here, probably a wild stab in the dark... but did you turn on your AirCon system a week or so before these problems started?
It may well be the power spikes from you aircon switching itself on and off are enough to slowly kill the filtering caps in the PSUs. Get some decent surge protection on your machine and your mom's then buy her a Corsair VX400w and watch in excitement and anticipation as it fails to explode!
There are a couple of problems with this statement though.

1. We havent turned on the A/C yet this summer because we have a pool and live on top of a hill that gets pretty windy.
2. We've had that desktop for about 2 years now and we've definitely had the A/C on plenty of times in the past.
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T3k
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The Tibaldi
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post #8 of 11
Well, it was worth considering.
But poor power will slowly kill a computer power supply, especially if it's at or near full load. Maybe it is someone down the street who has bought himself a welder...
    
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post #9 of 11
Thread Starter 
That is quite possible. Either way I just got home and am getting ready to go to frys to buy a new PSU, wish me luck and hope i dont buy too much other stuff

@allikat

I tested the PSU (paper clip method) and it is dead as dead can be so it is definitely not the power switch.

I'm starting to think that it was just a really bad coincidence.
T3k
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The Tibaldi
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WooJoo
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T3k
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The Tibaldi
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WooJoo
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CPUMotherboardGraphicsGraphics
Intel i5 3210 h77 HD4000 GeForce 640 LE 
RAMHard DriveOSOS
4gb of something 5400rpm slowness 13.04 Ubuntu x64  Windows 8 Pro 
Monitor
1920x1080 
CPUMotherboardGraphicsRAM
965 BE 4.0GHZ (250 x 15.5) @1.5V m2n32 sli deluxe - 2000mhz @ 1.3V Asus TOP 5850 1GB 950/1200 Kingston HyperX 5-5-5-15 
Hard DriveOptical DriveOSMonitor
WD Velociraptor 150GB, WD raptor 74gb TDK 880N DVDRW Windows 7 x64 Ultimate Westinghouse 22" lcd 
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post #10 of 11
who made the first psu? Raidmax tends to classified as generic quality.
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