S9 psu starting after long delay post voltage surge

[sagars209]

I have S9i with a Chinese psu 2300 watts? during night my voltage surges to 265v and I turn off miner at mid night and turn it back on in the morning when voltage is normal but for some reason it takes long for psu to start back and sometime I keep it switched on for few hours and ultimately miner will start running.. is this is a known thing?? I?m getting a voltage stabiliser soon with output range of 200v-240v, hopefully that you solve this for good

[BitMaxz]

No, it's not normal for Bitmains PSU since you are using a Chinese PSU I don't know how this PSU works.

Usually that kind of issue it's due to leak or maybe have broken capacitor if you have a multitester that could read capacitor from your PSU you can check those broken capacitors.
The multimeter that I use looks like this



You can replace that broken capacitor with the same value.

[mikeywith]

It's safe to assume that the vast majority (in fact if I do want to say 100% but I am afraid of being unjust to 1 or 2 manufacturers) of non branded PSUs are trash, not only a risk to the miner itself but even to your own property since they are a fire hazard.

If this was a device that runs for a few hours day while you are next to it -- it might pass, but having it run 24/7 unattended for the most part is a recipe for disaster.