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post #21 of 34
Thread Starter 
Quote:
Originally Posted by Razinhail;11924285 
No error beeps with no ram or video? Yeah, it's MoBo or CPU.



Absolutely. A multimeter is very handy at testing it to see if this is indeed the case. A Power Supply Tester is also very handy for this (and easier to use than a multimeter in most cases)




Normally, no.



So both computers are displaying similar symptoms and the only common factor is the PSU? It is possible that some dust or something inside the PSU moved when you removed it and placed it in the other computer. This caused a short, and now your PSU is a MoBo (or CPU) killer. This is all theory, but this is how I would proceed until you are able to get your hands on a multimeter or PSU tester and verify the PSU's integrity.

Thanks for your replies, that's pretty much the theory I'm going with as well for now.

And to clarify one thing that you mentioned that I honestly hadn't ever thought of, I know for a fact that dust got moved around inside the PSU; I used canned air to try and get some dust out of it. Not that it was overly or dangerously dusty, I just thought getting some out before putting it in a new computer couldn't hurt...but in theory it certainly seems to have done so.

In your (or anyone elses that reads this) opinion is it more likely the motherboard, considering theres no error beeps? Even if the CPU was shot, the MB would still give an error beep, right?
    
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post #22 of 34
http://www.computing.net/answers/har...eeps/3936.html

According to post #3, no beeps is bad CPU. IMO it could be either, and without a way to test the CPU in another board, (if budget will allow) I'd just replace both and sell the "bad" set on craigslist (advertised as problematic) to someone adventurous enough to try and fix it.

Perhaps a PC shop near you would be willing to just pop your CPU in one of their working boards and test it for a nominal fee? Whatever you choose, keep us updated. If you need anything else, feel free to ask!

EDIT - Using compressed air to clean out dust is good, but any time dust and crap gets moved around I get nervous for the next day or two. Years ago I cleaned a system and some dust got in the floppy drive power adapter. The computer refused to boot. No fans, no nothing.

I took out all the power adapters and blew on them. I plugged them back in and, like magic, it powered up and ran perfectly! Dust is a very tricky thing. Most people don't even think of it because it's not a primary cause for failure.
Edited by Razinhail - 1/7/11 at 8:51am
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post #23 of 34
Thread Starter 
Quote:
Originally Posted by Razinhail View Post
Perhaps a PC shop near you would be willing to just pop your CPU in one of their working boards and test it for a nominal fee? Whatever you choose, keep us updated. If you need anything else, feel free to ask!
I actually have the means to test everything for my sig computer (the new computer I'm out of luck, a local store wouldn't be a bad idea), but I'm concerned that I'll end up ruining even more parts. From googling it seems unlikely that a bad MB will ruin a good CPU or vice versa, but if it would actually happen I'd be screwed and down to no working computers.

The local shop seems like a pretty good idea actually cause they could also test my PSU I suppose.

/shrug

Thanks for all your help, I'll keep this updated.
    
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post #24 of 34
When you test the parts, I would not use your current PSU. But Popping the CPU in a working MoBo shouldn't hurt the MoBo at all. At least, I have never seen this happen in over 10 years of working on PC's.

The only time I ever saw a bad MoBo fry a CPU was when a capacitor had blown, and when it did it caused a short in the power feeds to the CPU. Pretty easy to diagnose without any tools other than your eyes and your nose. If it doesn't smell burning or burnt, I'd say it would be safe to test the CPU in.
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post #25 of 34
if dust is a possible problem can air every molex on the psu. Also if you dont mind opening it look around on the inside of the psu. I have a hard time believing its dust tho. More likely its a bad cpu or bad psu.
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post #26 of 34
Quote:
Originally Posted by ckybam3 View Post
if dust is a possible problem can air every molex on the psu. Also if you dont mind opening it look around on the inside of the psu. I have a hard time believing its dust tho. More likely its a bad cpu or bad psu.
If the dust is in fact the cause of the problem, blowing it out won't fix the PSU because once a short has been created, it's done. All it takes is some dust (more likely a small hair or some other small random debris) landing under a capacitor and you've got a short.

Is this an every day occurrence? Nope. Not by a long shot. The PSU most likely went bad and fried the CPU (which would make your final sentence correct). We were just discussing the cause of the PSU to suddenly fail. Sometimes they do fail without warning and without reason. Sometimes there is a reason.
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post #27 of 34
Quote:
Originally Posted by Razinhail View Post
If the dust is in fact the cause of the problem, blowing it out won't fix the PSU because once a short has been created, it's done. All it takes is some dust (more likely a small hair or some other small random debris) landing under a capacitor and you've got a short.

Is this an every day occurrence? Nope. Not by a long shot. The PSU most likely went bad and fried the CPU (which would make your final sentence correct). We were just discussing the cause of the PSU to suddenly fail. Sometimes they do fail without warning and without reason. Sometimes there is a reason.
Yes I agree with you. dust is possible just not probable. When you see as many ppl as I do that roll into ocn because they have a problem almost always its user error or faulty hardware.

I am inclined to think that unless you let tons of dust get in the psu and then blew it out all over the place it probably wasnt dust. Also he said he was building a new comp so that led me to believe it was user error or faulty hardware. You could be 100% correct there is no way for either of us to tell what happened. All we can do is aid the OP in hopes that he figures out the problem.
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post #28 of 34
Thread Starter 
Thanks for your help both of you. I still haven't got the exact details of what's ruined worked out yet, but at least what went wrong makes some sense in my mind now.

A basic timeline for reference for anyone is two nights ago I put together the new computer, took the power supply that worked perfectly out of the old one, and used canned air to clean it out, appearently ruining it in the process somehow (dust probably, even if unlikely...I'm almost positive there wasn't any liquid sprayed out and it seems odd for it just to decide to die at that time) before putting it in the new one. The new computer POST'd and was in the process of booting up when it shut down, since which I've not been able to get it to even try to POST. Spent 8 hours trying to fix it before going to bed. Woke up and put the power supply back in the old computer (didn't suspect the power supply of actually being ruined at that point), which POST'd and let me into the BIOS before shutting down, since which I've not been able to get it to try to POST either.

So until proven otherwise, I'm going with the theory that my PSU ruined either the motherboard or CPU (or both...or even more in theory?) of both computers. Which oddly is somewhat comforting to me because even though it means I'm going to need to spend some money, also means I'm not as completely incompetent at building computers as I've felt for the last two days.

Tonight I'm going to try swapping some parts from my old comp into my mom's to test what exactly is ruined; assuming it is the power supply that's caused all of this, would it be fairly safe to say that the same parts from both computers are ruined? Because I have no means other than a computer shop to test my new computer.

Again, thanks for all your help. I'll keep this updated.
    
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post #29 of 34
Well dont pop it in your moms computer unless she has a better psu. If it wasnt dust and was indeed the psu just crapped out that either means it was manufactured bad or it crapped out due to you putting to much load on it and just couldnt take it.

does your mom have a mobo that will take just your cpu? and if so what are her system specs? If its a dell hp or whatever it might not support some of your stuff and odds are its a low watt psu.

Other thoughts: try taking your psu or cpu to frys or whatever you got around and ask if they can just pop it into one of their test cpus they have for ppl to play on. They could prob at the least put your psu to a multimeter.

or if you want to do it yourself:
Also try taking your psu out and do the paper clip trick and power on just a fan by itself or something. If that works start adding parts one by one (excluding the mobo ofc). If it can power most everything it could be your cpu or mobo.

What psu are you using? your system doesnt say. I am going to take a stab and say its from an old emachine or dell or something like that?
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post #30 of 34
Thread Starter 
The PSU that (probably) went bad was this. Not amazing or anything but it got the job done nicely for three and a half years until...whatever happened.

My mom's PSU is a fairly generic one that just came with her case (I built her computer for Christmas, luckily. Her old one was a Gateway from 2000 or somewhere around there), but it's 580 watts so it was enough to test all the parts I needed to at least.

Another update though and one more question to take a stab at:

Tested the RAM, 460 GTX, and Q6600 in her motherboard. RAM and 460 are both working fine, and I THINK the Q6600 is too, but her MB doesn't support 95w CPUs. It got past the POST screen but then said something about not supporting anything above 65w and shut itself down. I think that means it would work though in a MB that supported it, right?

Anyway the question though; I have no way of testing my new computer other than to take it to a local store, but if you had to guess (since guessing is mostly all this whole thing has been anyway), is it likely that just the MB of my new comp is ruined, since that seems to be all that's ruined from my old comp?
    
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