Or is there a specific part with this kind of PSU that always get broken?
I've been very curious about this also, not just Bitmain PSU's but also the ones made for Canaan and microBT.
These things are not that complex and are fairly easy to design to be bulletproof. Even cutting cost to a bare minimum is no excuse for the PSU's failing so often. Being more than a little familiar with multi-kw PSU design <cough> my gut feeling is that the problem area is the power-factor correction circuits... More specifically, the MOSFET Q4, the 3 diodes around it and the inductor used in the circuit shown in that repair guide.
Anyone ever have one of these repaired and gotten a report on what problem was and repair work done?
