My computer is experiencing the following issue: sometimes it will beep on startup, go past the BIOS welcome screen, show the Windows 7 loading logo, and then...nothing. Scren will show 'NO INPUT SIGNAL' and then screen will go into 'GO TO SLEEP MODE'.
Other times the computer will boot up with absolutely no problems and it will run games and everything OK, so this problem is very confusing.
Went into device manager and noticed that this has a yellow sign: LPC Intel(R) ICH9R - 2916. Not sure if that can be the problem because if that was the problem it wouldnt be intermitent.
The problem is totally random, when it gets into sleep mode I will push caps lock and the led on the keyboard wont change, meaning its not just a video input problem. I must hard reset when this happens, and sometimes it takes up to 3 or 4 attempts to get it working. I am afraid I will screw up the PC if it keeps doing it but I dont know how to fix it.
I opened the case and made sure all wires are properly connected. It seemed to fix the problem for a while but now its happening again. The computer is in a place where it doesnt move at all.
If it was some hardware related problem it would give some beeping code, right? Internal speaker is on because it beeps when it starts to boot.
The PC is 3 years old:
Windows 7 ultimate 64bits, 4GB of RAM
Intel Core2 Quad Q8200 @ 2.33GHz
nVIDIA GeForce GTX260
It seems to be quite serious. I thought it was your display dying, but I believe now it is your motherboard. Unfortunately, the beeping code are not an ideal monitoring tool.
Your keyboard freezing point to that. I don't think that hard rebooting your system will damage it. It can corrupt some files, but it doesn't usually impact the hardware. I was having a weak power supply and a really power hungry video card and it was about the only time where I understood it could be dangerous for the hardware.
You should check if your mobo is still under warantee and try to have an RMA. This is what I would personally do.