I tried ot plug it into the wall and it did not turn on.
I can not find a power supply for it.
Which one should i buy?
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i have a few m3 and what i know is that they dont turn on if you are not using whatsminer own psu provided whit the miner.
the miners psu has a cable connected to the controller wich allows it to controlll fan rpm and something more.
you will need to get a m3 psu for it to work , they only work for about 5mins and shutdown whit random psus.