So I am working on a 2009 4,1 Mac Pro with Dual Xeon E5520's and 8 GB RAM. About 4 months ago the PSU went down. That swap went great. No issues following the swap. Unfortunately about 2 weeks ago the mac pro went out again. This time it wouldnt show any signs of power(when the PSU went out last time I could still hear some noises indicating some power). This time zero power noises. However I did find both OVRHEAT CPU LED's to be blinking red rapidly without end. I read that they are...
Fan problem following backplane replacement
Fan problem following backplane replacement