i bought a beat up G8000 at an auction, it runs but only puts out 70 volts on the 120 plugs and maybe 30 amps on the welder studs. i cant measure the welder output so i am just guessing at the amperage, the OCV is around 40 volts at high idle.

what could be the problem?
it was putting out nothing when i first got it but i wiggled the connector on the PC board and it started producing power but only half like i said before