Who’s it made by.
Looks like it’s a basic Little dc unit.
I see it’s got 2 fixed pulse settings but no adjustment on them at all so dunno how useful they will be you’ll have to try them.
I find plugging it in and turning on the power helps
Tongue in cheek comment, several years ago, frustrated I pluged my TIG in and turned the mains on, stuff me she doesn't work, worked last time I used it 4 years previous. Sent it back for repairs, as I was desperate, he told me it was fine, 'did you turn on the on switch on the machine'. **** happens