Fish avoid dangerous sea creatures wait for the rescuers and Enjoy

Please Roblox when I play any games my screen gets blacked out for no reason and refuse to boot up again. I've been playing roblox since 2012 and from this year to 2017 there was no big issues about that. But then, for no reason the crashes. Also when I am playing the game appears fine and there is no graphic bugs. And if it was a GPU crash it would have said it after the reboot.