Thank you for the pictures, and the additional information about the fault.
It sounds like the main welding transformer was not getting powered up by the contactor. That is done via the white relay on the board. As far as I know, the only components involved are the potted transformer, a bridge rectifier, a smoothing capacitor, the torch trigger switch, and the white relay. It is quite common for the small transformers to have a short life, but if the fault was not that transformer, then there is not a lot left to fail due to overload or age.
If it happens again, we can do some remote troubleshooting!
It sounds like the main welding transformer was not getting powered up by the contactor. That is done via the white relay on the board. As far as I know, the only components involved are the potted transformer, a bridge rectifier, a smoothing capacitor, the torch trigger switch, and the white relay. It is quite common for the small transformers to have a short life, but if the fault was not that transformer, then there is not a lot left to fail due to overload or age.
If it happens again, we can do some remote troubleshooting!
