Before I send this too a hobart dealer is there anything I can look at of test too ake sure I cant fix it..

bought it 2 yrs ago N.I.Box Hobart Air Force 250 Plasma cutter..Worked great until last week when i pulled it out for the 7-8th time too use since owned and while cutting it ust shut off...No lights or nothing..Changed plugs and ckecked voltage but no worky.. Out let works just fine as I plugged it into another and plugged other equip in the same outlet

any suggestions, thanks much