Hello! Too many pages. My eyes are crossed. I have a D3 with a dead board. Is there anything I can do to bring it back to life? It worked fine at first. Nothing looks burned. Thanks for the help.
Please try to run it with only that board connected to the first chain connector. Try to swap PSU / chain cables to see if it gets detected. Try to start at default voltage (13) and set a low frequency to see if you can get it working (200Mhz).
If that works: decrease voltage / increase clockspeed slowly until you found the sweet spot