Originally posted by oP
It obviously has nothing to do with the controller if there's no signal :/
I turned it back on today and it worked for like 15 minutes, then froze and did the same issue.
Ah I misunderstood the issue. But now I know what it is, it's a pre-GLOD on it's way to YLOD. It's why after several hours it will turn back on for a while and freeze. Honestly, I had a system just like this and tried to repair several times. But it just kept coming back, repair is temporary. You're better off getting rid of it.