f your PSU and antminer turn on fine, then the PS-ON jumper isnt the issue (assuming it isnt randomly wiggling loose, but then it would cycle on and off a LOT!
sounds like the issue is your antminer if multiple PSUs cause the issue, but im not sure why. try switching the control board to the secondary hashing board and run only that side of the unit.
also, take a multimeter and measure the voltage at the screw terminals. if its outside of 11.8-12.3V you could be having issues
You didn't correct jumpstart your PSU.
Buy a PSU tester and plug it into the motherboard cable with 24 pin and your problem is solved
OR read a tutorial how to jumpstart a PSU the right way.
Thanks for the replys.
What I forgot to add was that it was running fine for a couple of days before it started to do this.