1,2,3 error 0021
0021 This can be caused by two completely different things either:
A. DVD Drive Time out - Can be caused by problems with a firmware flash. This is also speculated to sometime be caused by a problem with the southbridge chipset on the motherboard based on how it connects to the DVD drive.
B. GPU error, generally caused by a poor connection to the mainboard (cold solder joints/bridged solder joints) See error 102 for more information
I have never had a overheating issue. I also did the xclap fix with heatgun just incase. I washoping that was the problem even tho I knew it wasent.