Probably the thermal compound on the heatspreader (I think that's the name of it) wearing off. You can temporarily fix that by opening it up and replacing it with some new compound.
Free Step Dodge
Chapstick
GeomighT
if you can get it to turn on Take it to bestbuy they have a $150 voucher for trade in on PS4's this weeknd
Hold_Junkie93
There's this one screw that won't budge when I attempted to open it. Just going to send it to Sony,
Chapstick
The problem with sending it to sony is that it costs a couple hundred I hear and sometimes they'll just be like "we can't fix it sorry"
Chapstick
And keep your HDD with all your save files
Hold_Junkie93
They are charging me $79 to fix it .
GeomighT
Radioshack is selling PS3 Slims for $77 160 GB version see if they're still in stock
Chapstick
^holy crap, $77?