leave it on so maybe it will overheat bc i think someone can correcte me if im wrong but they usually just replace the whole system when it gets that overheating problem
go rent a blu ray movie that is 1080p and is like 2 and a half hour like pulp fiction or the godfather
wrap in 4 towels and then finally a blanket.
leave one for 8 hours and it should overheat and maybe get ylod or fried mobo