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WILL NOT POST - second motherboard

post #1 of 8
Thread Starter 
****, frustrated beyond words. My computer took a **** I dont know what happened but I heard a pop and smelled smoke. So I open it up and took everything out. Mobo had brown, toasted caps so I tossed it. The video game, memory, psu, CPU all look good, no burning. So I ordered a new mobo and case. (the case was having issues with shorted front usb and such also). Put everything in as a new build, will not POST. nothing on the screen at all.

I looked over the standard troubleshooting guides, I used standoffs, checked everything, CPU connections, etc. All the lights and fans are on, the dvd drive opens up and whirls. So I figured, maybe the mobo is bad. I returned it and bought a pretty expensive gaming one. Asus M5A99FX paired with my FX8320.

Took everything back out, double check everything. Install the new mobo. WILL NOT POST!!!

booted it up without ram, with 1 ram, 2 ram, in all slots. Tried onboard graphics (on previous mobo i returned), and then the video card. Either showing no display.

The only clue I have is the red CPU LED on my new asus motherboard is lit up. So I pull the CPU and check for bent or broken pins. nothing, no burn marks, no pin issues.

I feel like I'm throwing money down a rat hole now.. I need to get a new CPU, then if that doesn't work, then who knows?

I can rule out the motherboard and case, they are brand new and this is the 2nd board. I can rule out install, I looked over everything, bios version is updated, etc.

So that leaves, GPU, CPU, mem, and PSU. I have another desktop so I'm going to pull the mem, PSU and GPU out of that.

IF after all that does not work, it is 100% the CPU right? Is it possible for a CPU to be bad from a mobo short without any signs of damage or burn marks???

I dont want to drop another 150 if its not the problem, esp since you can't return CPUs.

Any help appreciated. Need this working.
post #2 of 8
Thread Starter 
just tried another psu, same ordeal. tried new ram from my other computer, same deal.... red cpu light.

only thing left is GPU and CPU. Im guessing since the cpu light is on, it's the CPU that's blown ****
post #3 of 8
Quote:
Originally Posted by kettlecorn View Post

just tried another psu, same ordeal. tried new ram from my other computer, same deal.... red cpu light.

only thing left is GPU and CPU. Im guessing since the cpu light is on, it's the CPU that's blown ****

what motherboard did you have that went pop?
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post #4 of 8
Thread Starter 
It was a Gigabyte 78LMT-USB3 nothing spectacular.

So I took apart my other desktop and tried a new source of PSU, GPU and memory. Redid everything. Still red light on the CPU LED and no post. I am guessing it is the CPU in this case then? If I buy it and it doesn't work I'm going to be pissed cause it wouldnt make any sense at all.
post #5 of 8
Boards can take out processors.

PSU can take out boards and processors.

Processor can take out the board and RAM.

You got lucky to fry a board and cpu in one shot.

Welcome to the death valley of hardware overclocking. thumb.gif
post #6 of 8
When a motherboard dies, especially by VRM (mosfet) death, the first most likely collateral damage is the CPU. So, one can't be 100% certain, but most likely, the motherboard while dying overvolted your chip and killed it.
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post #7 of 8
Quote:
Originally Posted by ShrimpBrime View Post

Boards can take out processors.

PSU can take out boards and processors.

Processor can take out the board and RAM.

You got lucky to fry a board and cpu in one shot.

Welcome to the death valley of hardware overclocking. thumb.gif

Quote:
Originally Posted by Undervolter View Post

When a motherboard dies, especially by VRM (mosfet) death, the first most likely collateral damage is the CPU. So, one can't be 100% certain, but most likely, the motherboard while dying overvolted your chip and killed it.

Sadly agree with their thoughts. I've only popped one VRM and luckily the cpu survived, but it's very likely that in your case when the motherboard went , it took the cpu with it frown.gif
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post #8 of 8
Was the CPU overclocked?
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