I built this computer today, and it wouldn't boot. The MOBO was reporting A3 before it shut down, and I was able to see that it was a video card problem. I removed the MSI 560ti 448 and replaced it with an old card I had lying around (7800 GTX). It booted just fine with this card. I googled the problem, but haven't found too many answers. I was wondering if anyone had any idea how I could deal with this problem.
My System: Haf 912 Case i5 2500k 212 CPU Cooler Asrock Z68 Extreme 3 Gen 3 MOBO OCZ ZS 750w PSU Corsair Low Profile Ram 2x 4gb ADATA SSD MSI Twin Frozer 560ti 448
Thanks for your help.
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Presuming you have connected power to the card, it is likely the card that is faulty.
Firstly try Removing and reseating the ram. Check both 6 pin power connectors are connected to video card