So the other day my MBP was left on my bed...one of my fans had been messing up so it would get pretty hot. Was on the internet in the morning and ended up leaving to a friends house. Got back like at 2 in the morning and found my laptop on my bed redhot. quickly i unplugged it and let it cool off. Now, when I turn it on, it makes the hardrive startup sounds (the weird sound right before the apple logo flashes on the screen) and then thats it. just stays black, almost like the battery is dead, which its not. i can push the power button all i want, but it never turns on....just makes the same hard drive noise. What could be the issue? What needs to be replaced? Do yall think that my hard drive is long gone?