I was attempting to install Windows 10 on my PC, which was already running Windows 7. The installation seemed to fail partway through and after resetting the computer it no longer show on the display. The PC turns on, the fans still run, and the lights turn on, but no display. I've tried multiple different displays and the connecting wires. I have attempted to rest cmos, run is safe mode, power cycling, and pretty much everything I could find online. I'm just not sure how to fix the problem as I'm not completely sure what the problem could be.