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Asus P8z77-m pro motherboard, smoking Logic unit.

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  • Motherboards
Last response: in Motherboards
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September 2, 2013 9:25:39 AM

Hey guys, I need some help here.

I plugged in my brand new CX500 power supply into my mobo booted up, and to my horror one of those microchip thingies starts smoking (see top right next to the fan3 header). Ofc I turn it off.

I check my connections for anything that could be causing problems, but it all seems fine. When I turn it back on, the mobo seems to post fine, but there is still the problem of the hole in one of those microchip thingies.

Pics below:



Any info about what happened or what I should do will be very appreciated.

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a c 559 V Motherboard
September 2, 2013 11:31:14 AM

Hi, Try testingfirstly the power supply: http://www.youtube.com/watch?v=5FWXgQSokF4
If working, try starting the board by shortly touching with a scewdriver the 2 pins from the motherboard where the power button wires get connected.
Do the tests outside the case.
If still no fans spinning, then yes, it might be a board issue.
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September 2, 2013 11:42:51 AM

alexoiu said:
Hi, Try testingfirstly the power supply: http://www.youtube.com/watch?v=5FWXgQSokF4
If working, try starting the board by shortly touching with a scewdriver the 2 pins from the motherboard where the power button wires get connected.
Do the tests outside the case.
If still no fans spinning, then yes, it might be a board issue.


Hey man, thanks for the response, I managed to get the mobo to boot by connecting the power button from the case, but that seems to have caused a new problem, I updated mt thread accordingly. Any further help is appreciated.

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a c 559 V Motherboard
September 2, 2013 12:12:35 PM

You put the board on a conducting surface (metal) without using standoffs?
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September 2, 2013 12:50:37 PM

alexoiu said:
You put the board on a conducting surface (metal) without using standoffs?


no that's the motherboard tray..
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a c 559 V Motherboard
September 2, 2013 1:00:38 PM

Are there standoffs between the board and that tray?
However, I would try RMA-ing the board.
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September 2, 2013 1:33:45 PM

alexoiu said:
Are there standoffs between the board and that tray?
However, I would try RMA-ing the board.


Yeah there is, yeah I have to agree is probably the safest option to RMA, but I really need the PC for CAD work this coming week, would you strongly recommend against waiting a week to RMA since the mobo still appear to function normally?
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a c 559 V Motherboard
September 2, 2013 2:53:03 PM

I can't see what's written on that chip. Can you post a picture?
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