My PS3 bricked, help me from doing it to my next one.

So I'm not sure how this happened, but I'll share what I know.

Recently I was playing Stardust HD when it froze. I thought "that's strange, but I guess games freeze" and decided it wasn't a big deal. The next time I turned it on it got to the startup screen and then started getting a lot of weird green static, which eventually covered the whole screen. At first I thought this was an A/V problem, but then the PS3 froze and now either does that or won't turn on all together...

Luckily, waranties exist. However, do any of you guys know what the hell happened so I could prevent something like this again? At first I thought It was a heating issue, but I've left it on for much longer than the instance where it first froze on me.

did u drop it hit or anything or try to downgrade it in some crazy way

Never dropped, never downloaded/installed anything that wasn't from the PS Network. Happened quite a while after the latest firmware update.

I just hope I happened to get a faulty system.