Contribution d'origine par : brandonbanfield ,
Your logic board is most likely failing. Sorry, I know that's not the answer you want to hear, but those models are famous for bulging capacitors. If you were to take the back off, I'm sure you see some (could try cleaning it with compressed air). You can replace them, if you know how to solder, otherwise you have to replace the logic board. I actually just ordered one for a guy who had the same exact problem. The board is about $50 on eBay. There's a guide on here to replace it if you want to DIY.