I am having the same issue. Let me know what you find out and I'll do the same. I installed Win 7 w/ an upgd disk, purchased a license and created a boot USB drive, reset, and not the light stays on after is was running fine. No VGA output from my GPU or the build in GPU via my 2600k.
Open a new question thread on your problem, that is the best way to get helped : )
Not 2 problems are the same and if u will post more questions here, it will start to be confusing for everybody : )