Motherboard Smoking Behind CPU

qwertysam

Commendable
Jan 21, 2017
2
0
1,510
So here's a short story of what happened...

I made a newly built computer yesterday. I powered on the PSU and hit the power button on the case to power on the computer. Smoke emanated from the back of the motherboard from behind where the CPU is, and I unplugged the PSU immediately. It had a very strong smell of burning electronics.

I browsed online for answers, checked that I didn't use excessive thermal paste, double checked that nothing was stuck inside any connectors, made sure all connectors are in very snug, and made sure that no standoffs or screws could be causing shorting of any traces or components.

I have also sent an email to Newegg and ASRock. Newegg says that the most they can try to do is send me a replacement, and I haven't heard back from ASRock yet.

Here is an image showing the burning caused at the back of the motherboard, behind where the CPU is. (The greenish metal is the mount for the CPU cooler, which has non-conductive standoffs).
9zv5aMH.jpg


Here is my complete parts list

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-6600K 3.5GHz Quad-Core Processor ($306.25 @ Vuugo)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($35.83 @ Vuugo)
Motherboard: ASRock Z170M Extreme4 Micro ATX LGA1151 Motherboard ($179.99 @ Newegg Canada)
Memory: GeIL EVO POTENZA 8GB (2 x 4GB) DDR4-2400 Memory ($54.99)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.85 @ Vuugo)
Video Card: EVGA GeForce GTX 1060 3GB 3GB GAMING Video Card ($254.98 @ DirectCanada)
Case: Fractal Design Core 1500 MicroATX Mini Tower Case ($79.99 @ DirectCanada)
Power Supply: Deepcool 550W 80+ Gold Certified ATX Power Supply ($79.99 @ Newegg Canada)
Total: $1051.87
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-01-21 11:36 EST-0500

To the motherboard I have connected:

  • ■Intel i5-6600k
    ■2 case fans to the case fan headers
    ■CPU fan to the CPU fan header
    ■8 pin 12V cable from the PSU
    ■24 pin cable from the PSU
    ■USB 3.0 case header
    ■HD audio header (case audio jacks)
    ■Case power button, reset button, HDD light, power light, etc.
    ■SATA 1TB HDD
    ■2 x 4GB Ram sticks
I've put parts together before, but this is my first *real* computer build. These parts were selected by me and a friend (who has built many computers of his own) to ensure compatibility. I installed all the parts following online guides as well as the provided handbooks for each individual part.

I apologize that this isn't too exciting, but any help is greatly appreciated, thank you!
 
Solution
The bent pin caused that problem, yes, newegg will not replace the MB for you. Try your luck to see asrock will replace the MB or not.
The MB is gone, you can't fix it, if asrock doesn't replace the MB, you will buy the new one, sorry.

qwertysam

Commendable
Jan 21, 2017
2
0
1,510
I looked under the CPU and found that a power pin was being shorted. I straightened it out and now there's no smoke or singeing, but the computer won't display any BIOS messages on the screen. Newegg refuses to provide a replacement for me, so maybe I should turn straight to ASRock. Any hints as to a fix I could do?
 
The bent pin caused that problem, yes, newegg will not replace the MB for you. Try your luck to see asrock will replace the MB or not.
The MB is gone, you can't fix it, if asrock doesn't replace the MB, you will buy the new one, sorry.
 
Solution