It could be that the motherboard has died.... We probably couldnt say anymore without looking at it, or knowing what cpu/ram it has and bringing a spare of each to test...
Life is a tool, use it wisely and properly. Don't break it, because you can't exchange it if you do.
Life is an instrument, it needs regular cleaning, maintenance and tuning to keep it at its best.
Fear, is not knowing. Terror, is finding out.