A2 error on boot, two video cards not working

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   Status: UNRESOLVED
Computer Type:Desktop, custom built
GPU: EVGA GeForce GTX 1060 SC GAMING, 06G-P4-6163-KR, 6GB GDDR5, ACX 2.0 (Single Fan)
CPU: Intel - Core i5-4590 3.3GHz Quad-Core Processor, no overclock
Motherboard: Asrock H97M-ITX/ac
RAM: Corsair - Vengeance Pro 16GB (2 x 8GB) DDR3-1866 Memory
PSU: Corsair - CX 500W 80+ Bronze Certified Semi-Modular ATX Power Supply
Operating System & Version: Windows 10 pro build 1703, 15063.608 64bit, clean install
GPU Drivers: 385.41 WHQL, clean install
Description of Problem: I get A2 error on boot and then a black screen on my monitor as the windows 10 login screen should appear.I also get a device disconnection sound right before it goes black. I am replacing an Asus - GeForce GTX 970 4GB STRIX Video Card that also had been giving the A2 error on boot, it was assumed that card was bad an so the new card was purchased.
Troubleshooting:
I have reset the CMOS by jumper switch around and by battery removal (10 minutes not 4 hours).
I have updated my BIOS from 1.8 to 1.9.
I have disabled my IGPU driver in device manager.
I have reinstalled windows 10 pro and re tried install of GPU.
I have tried installing two latest Nvidia 10 series drivers 385.41^WHQL and 385.28 and also an old once stable driver 375.95.
I have tested my RAM with MemTest86 and gotten no errors.

I am beginning to think my motherboard has done damage to my video cards and or is damaged itself. Any suggestions?

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druvideo Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 15 Sep 2017 Status: Offline Points: 3	Post Options Post Reply Quote druvideo Report Post Thanks(0) Quote Reply Topic: A2 error on boot, two video cards not working Posted: 15 Sep 2017 at 3:24am
	Status: UNRESOLVED Computer Type:Desktop, custom built GPU: EVGA GeForce GTX 1060 SC GAMING, 06G-P4-6163-KR, 6GB GDDR5, ACX 2.0 (Single Fan) CPU: Intel - Core i5-4590 3.3GHz Quad-Core Processor, no overclock Motherboard: Asrock H97M-ITX/ac RAM: Corsair - Vengeance Pro 16GB (2 x 8GB) DDR3-1866 Memory PSU: Corsair - CX 500W 80+ Bronze Certified Semi-Modular ATX Power Supply Operating System & Version: Windows 10 pro build 1703, 15063.608 64bit, clean install GPU Drivers: 385.41 WHQL, clean install Description of Problem: I get A2 error on boot and then a black screen on my monitor as the windows 10 login screen should appear.I also get a device disconnection sound right before it goes black. I am replacing an Asus - GeForce GTX 970 4GB STRIX Video Card that also had been giving the A2 error on boot, it was assumed that card was bad an so the new card was purchased. Troubleshooting: I have reset the CMOS by jumper switch around and by battery removal (10 minutes not 4 hours). I have updated my BIOS from 1.8 to 1.9. I have disabled my IGPU driver in device manager. I have reinstalled windows 10 pro and re tried install of GPU. I have tried installing two latest Nvidia 10 series drivers 385.41^WHQL and 385.28 and also an old once stable driver 375.95. I have tested my RAM with MemTest86 and gotten no errors. I am beginning to think my motherboard has done damage to my video cards and or is damaged itself. Any suggestions?