Sell for spares and prepares and just buy another from eBay. Make sure you set up webman which you can manually set the CPU fan speed. I have done it on my Slim to 40=60% and it stays at 50C and below for both GPU and CPU. I hope this helps.
I would recommend spending 50 cents in thermal compound and trying cleaning the thing out to see if it comes back to life.
It takes about 15 min to carefully dissasemble, another 15 to 30 to clean (use cotton cloth, and Isopropyl Alcohol) and a few min to reapply the paste. All said and done you will have it back together in an hour. It may come alive if heat was the issue.