Sorry to hear that, mate, but it seems like something went wrong and sadly enough since it's not youtube, they will not send a team of highly trained monkeys to fix it (hope someone will get the joke).
On the more serious note, I'd suggest you find a place where you could ask how much repairing could cost and then decide for yourself whether or not you should buy a new laptop. It does matter what you have right now, but since you posted this in older G's, then I would suggest going new if you have money for it.
Another thing is that you scratched something on the MOBO, or GPU started to overheat because of something. Are the fans working? Because you said you've cleaned them, maybe now they're stuck or something (just a wild guess, but what can you know).
Either way, best of luck.