I upgraded to Windows 10 after the release. During the upgrade, I did notice that my motherboard battery was going low as I was getting a beep indicating it needed replaced. I went on vacation, came back to the computer and now I get the following...

I've seen lots of posts on this issue, but no real solution. Like everyone else with this issue, my machine is black screen and 6 fast beeps after start up. Nothing else. Since I've read a lot of suggestions, I've tried a lot of stuff.

I've replaced the motherboard with a new battery.

I've replaced the stock 575w power supply with an 875w, same harness. I have a new harness, I just didn't go through the trouble, yet.

I've changed out the ram

The only thing I haven't done is replaced my video cards, yet. I know it's a video error, but it's 6 beeping with or without the video cards in the slots, on the new and old motherboard.

At this point I don't know what else to do.

Thoughts?