So a few weeks ago my PC screen glitched while I was playing a game--turned to straight lines, then went black. Upon restart, there were two vertical lines on the screen, and then the screen went black upon loading Windows. I restarted again and went into the BIOS settings, resetting everything to default (just to try it--I hadn't altered the settings to start with). That seemed to do it, up until yesterday, and it's the same thing.
I borrowed a monitor to make sure that wasn't the problem. It isn't; same issue. Two red/orange vertical lines in BIOS screen, goes black when Windows loads.
Here's the weird thing: when Windows loads and the screen goes black, the PC stops recognizing the Corsair KBM. Or at least, the RGB lights go out completely, and if the mouse or keyboard is responding at all I can't tell since there's no video output, and no sound.
Thoughts on what the issue might be? Pics linked here. It's an older PC but serves my purposes fine. I really don't want to pay a ton--even replacing the GPU with the exact same model is costly, and the same mobo isn't all that cheap either.
GPU: AMD R9 280X
MOBO: Asus Crosshair V Formula-Z