Computer Booting and Monitor Problem

Having two problems, which could be related.

1st Problem: This has been going on for a year or so and it is on the rare side(average once a month maybe). My computer doesn't boot up, but do hear fans/Harddrive and see lights inside.

I can fix this by turning everything off, unplugging power cable, holding power button down for 30 secs and then open the case remove the RAM, then put it all back together.

What could be causing this and any solutions?

2nd Problem: This one started this week, day after doing the above fix. While gaming after a period of time my monitor goes black and says DVI No Signal. When it happens I can still hear the game playing and music playing if I have music on(Music Bee or Spotify). If I shut it down, it boots back up without issue. This seems to only happen when I game, I have yet to experience this at any other time while on my PC.

Seems to happen when I have been playing a game for hour or so at least.

Sounds like something in the motherboard or video sub-system to me.

The newest problem may/may not be related to the latest problem.

First step (IMO) would be to ensure that the BIOS is updated to the latest version - but I'm not a hardware expert.

If you'd like more expert assistance, I'd suggest posting over in the Internal Hardware forums:    http://www.bleepingcomputer.com/forums/f/7/internal-hardware/ 

If you'd like more expert assistance, I'd suggest posting over in the Internal Hardware forums:    http://www.bleepingcomputer.com/forums/f/7/internal-hardware/ 

Thanks I posted it there.