I recently shut down my PC and then started it up again. It ended up stuck with "9C" or "90" with the edge cut off in the bottom right hand corner - white font on a black screen. It was just stuck at this point and did not progress any further. I eventually held the power button in until it shut down. When I tried to start it again I did not get anything - no signal to the monitor at all. When I press the power button to start up the PC, the fans in the PSU and case start, the light inside the case comes on. I don't hear any beeps. I don't get any signal coming to the screen.
So, what do I do? Can anyone suggest the most likely thing that this is? Are there any other tests or observations that would help you to diagnose the problem?