Constant fan blank screen
Ill start from the beginning…
One morning i had the no symbol icon when I went to turn on my iMac. Ran the Apple Diagnostics and the only error I got was a sensor error for the SSD from OWC.
I sent them back the drive. I put in the original drive and worked fine and no more error. They sent me a replacement. While I had the iMac open i decided to go one step further and take out the logic board and clean the CPU (Applying some fresh arctic thermal paste) and heatsink and fans.
All this I have done once before when I put the SSD in. Since i was there I decided to change the CMOS battery with a new one just because it was there and they are cheap. I put everything back together and im confident I have every cable secure in there.
I tried to reset the PRAM /SMC but its still the constant fan on and blank screen. I am currently going to take it back apart and again very carefully go through everything step by step just to make sure…
Any ideas? Thanks