PC Running, monitor has no signal

Hi there guys, so I have this little problem and I hope you can help me.
Yesterday I was playing a game and suddenly my PC turned off and then on again, but it had no signal, I tried restarting but it didn't work, I disconnected it and waited for about and hour and I just got to the bios screen before it went off again, I went to sleep so, around six hours later it ran up until Windows started, then it went off again, I'm using an integrated graphics, I already tried removing the cmos battery, I waited around 30 minutes before putting it again, I already unplugged the RAM too and everything inside the case seems fine, I'm going to try to unplug the CD Player as I read somewhere else, wierdly enough it seems the more I let it " rest " the more it works, I really hope you can help me, thanks in advance