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Topic: Bitmain APW7 PSU fan is spinning normally but has no 12 V output (Read 204 times)

member
Activity: 115
Merit: 12
I just got a new miner with this PSU and unfortunately I have the same problem.

fan spinning but not giving 12v. It was connected on 120V or 220V without any 12v output, also I used a tester.

somebody had the same problem???
legendary
Activity: 2030
Merit: 1569
CLEAN non GPL infringing code made in Rust lang
Don't fix if you are not a prosessional.

There are deadly electric charges in the capacitors!

Or discharge them first: https://m.wikihow.com/Discharge-a-Capacitor
legendary
Activity: 3374
Merit: 3095
Playbet.io - Crypto Casino and Sportsbook
There are some guide directly from Bitmain to troubleshoot the PSUs you can follow this "PSU Troubleshooting Guide"

If none of the method above and the solution works there is a problem inside the PSU mostly a shorted capacitor so you need to replace the shorted capacitors or if not try to clean the whole PSU it sometimes solves the issue by cleaning and removing dust and corroded/rusty parts.
legendary
Activity: 2464
Merit: 1710
Electrical engineer. Mining since 2014.
Don't fix if you are not a prosessional.

There are deadly electric charges in the capacitors!
jr. member
Activity: 43
Merit: 59
Recently one of my miners stopped working, was unable to power it on, was just giving me red flashing light on fault.

I used bitmain's troubleshoot guide and it shows that my PSU is faulty. When i replaced with a good working PSU, miner booted up normally.

I proceeded to test the faulty PSU and tested it with multimeter. Multimeter showed results that varied from around 3.90V to 4.30V.

I am familiar with PSU's protection mode, and i left it offline for like 10 minutes and then for couple hours to try to boot it up again - same results. But could it be stuck there somehow? 

Does anyone have any clues? I am curious is there anything i can do to fix it?
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