45 minutos - 1 hora
Xbox red ringed with a cpu/gpu overheating error code (good idea to check your error code).
I did a reflow of the mobo and used the new thermal paste, took a few hours to get it all apart and ready, but now the Xbox works great, I'm very happy I didn't have to buy a new one.
Only problem was there was a hole in the bag when I got it and I only had 7 of the 8 screws needed. Went to home depot and picked up a package of 10-32x1/2 machine screws, which are longer but they did the trick.