Hey all, I recently ordered a computer and I have everything up and running. The only problem is, when it boots, I get a black screen with 'A3' in the lower right. I have researched and have found it could be video or sata. I have tried multiple sata ports and cables, and also changed the power cord from the GPU, all to no avail. After waiting on the black screen with A3 on it for a minute or two, it will boot into a windows startup error (using my old HDD with Win7 on it) or the motherboard setup screen. Any help would be greatly appreciated - I have been without a computer for quite some time and it is essential to my schoolwork.