Yesterday I was using my computer as a monitor for a friend to play a PS3 on. I have the Acer Aspire 5600U All-in-one PC so it has the HMDI ports for need. When he left, i just switched the screen back to the PC only to find an error code, I didn't catch what error it was but my computer was frozen, i let it sit there for maybe 45 minutes stuck on 100% so I force turned it off, when I tried turning it back on, it just turns on the power, & everything works, the hard drive the fans the external devices connected but the screen just turns back off after maybe 10 seconds, I don't have a mouse cursor or anything, just black screen turns on, then turns off, but power remains on & that's it. I have disconnected all the external devices to see if anything was bugging it but nothing worked. I've let the computer sit like that overnight thinking maybe it was just booting itself into a repar, nothing. I don't get a logo i don't get anything, just powers on, then screen turns off. If i power on the PS3 the screen turns on & works, & i have full functionallity of the buttons on the side, but the second i switch to PC it say's "PC No Signal?". No idea what to do.