Can an alternative PSU be used for the M3?
I've read different posts about the mysterious 3-pin 'Power control cable'. Is this cable necessary for the miner to work properly?
Yes. Custom one of psu.
Soo you now have a dead unit.
This is true for.
All Whatsminer
All new bitmain s11 s15 s17 t15 t17
All innosilicon t2 24 t2 26 t2 30 t2 37 t2 50 t2 57
At least Pangolinminer was selling spare psu’s you could have purchased one ahead of time.
I have 2 spare psu’s for my m10’s and as soon as I see a psu listed for the m20s I will buy one.