This is how you fix the 1 red ring error code e 74 hardware failure. I AM NOT RESPONSIBLE IF SOMETHING GOES WRONG. I have done this twice and worked both times. Make sure to screw the heat syncs back on very tightly or else you might get the over heating red ring. 4 minutes on the cpus, gpu, hana, and four ram disks with the heat gun should help. Make sure to spread the thermal paste back on the chips with que tips AFTER it is cooled down overnight or for a few hours. Dont worry about the thing in the middle thats from my converter. Sorry for the crappy quality i used my phone. Thanks for watching and i hope this helps.