My PSU burnt and then nothing works

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MohnishPRC200

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Mar 23, 2013
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I installed an AMD Fx4100 processor on a Gigabyte motherboard with 2GB DDR3 RAM.
Everything hooked up, worked like a charm. Suddenly my cheap PSU just burns inside the cabinet.
On inspection, the wires are BURNT, try my machine with a spare PSU, CPU fan and System fan on, nothing else. No post, no beep.
Vendor tested, the mobo was fried, got the defective part replaced. After replacement test, the PC refuses to boot up.
He does an RMA for the processor, saying the processor has gone Kaput.
The processor has gone for RMA, I am worried if AMD rejects RMA.
There was no burn marks or sign of any wear on the chip.
:( what could the outcome be?
The RMA was done next day as the processor was less than a day old.
 
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larkspur

It could be all of your components. Your motherboard was toast - trying a spare PSU of course didn't make a difference. The 'tester' should have checked the RAM too.

To directly answer your question - No, bad ram will not prevent the POST (power on self test) from telling you that it has a RAM error (as long as you have the PC speaker connected to hear the beep pattern). Why...
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Swordkd

Swordkd

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It's possible that your RMA will be denied. They do test Cpu's for things like that. Hopefully things go well for you and you'll get your processor replaced.

Unfortunately, this is why you never, ever rely on a cheap PSU. It might work today, it might work tomorrow...but when it goes, BAD things can happen.
 
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larkspur

larkspur

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You're fine. AMD will replace the CPU, it was a day old. I'm surprised the vendor didn't test the CPU and RAM immediately when he knew the mobo was fried due to a cheap PSU. Hopefully you learned the lesson and will use only quality PSUs going forward. Good luck!
 
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larkspur

larkspur

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If your PSU blew your motherboard then anything plugged into the motherboard and/or PSU could now be dead (CPU, RAM, GPU, HDD, etc). Whoever this person is who is doing this 'testing' for you and who is telling you the CPU is 'kaput' should also be testing every component that was plugged-in to the system when it fried.
 
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MohnishPRC200

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I totally agree, but when my PC did not boot up, could it be a fault of the RAM?
If the RAM was damaged because of the S*** PSU, could the damaged prevent the PC from booting up?
I am a newbie and am wondering if my CPU was fine after the burn, but the mobo and RAM just blew up and prevented the boot up?

 
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atomicWAR

atomicWAR

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not likely...this isn't which came first the chicken or the egg situation...The PSU is as far as you need to look. period. the ram had nothing to do with it. the very second you hit the power button the PSU fried everything...ram, mobo, graphic...the ram never had a chance to cause a problem.
 
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MohnishPRC200

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Mar 23, 2013
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You did not get my point!
I tried my system with a spare PSU after the burn, and then only the fans would run.
The tester said, it's the motherboard ( faulty part replaced) and the Processor (under RMA). He did not check the RAM.
Could it be, that instead of the processor, the RAM was fried?
Does a spoilt RAM prevent display, POST, beep, boot up if the mobo & processor are fine?
 
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atomicWAR

atomicWAR

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i actually do get what you are saying. what I am saying is no....everything was fried to one degree or another.

to anwser your question about post, beep , etc....no it does not...it would still go through post with broken ram if the motherboard is fine...and thus what i and everyone else is saying. your psu did it all the ram had no role.

you get me now? i just want to help you understand. i can tell you are eager to learn.
 
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larkspur

larkspur

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It could be all of your components. Your motherboard was toast - trying a spare PSU of course didn't make a difference. The 'tester' should have checked the RAM too.

To directly answer your question - No, bad ram will not prevent the POST (power on self test) from telling you that it has a RAM error (as long as you have the PC speaker connected to hear the beep pattern). Why not just ask the 'tester' why he is sure that the CPU is bad? Like I said earlier - ALL the components that were plugged-in might be bad now, either test them now or wait till you get your replacement CPU. Again, if I was the 'tester' I would be telling you why the cpu tested bad and individually testing your other components.
 
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