Other than a wire off the wire feed motor, it's a faulty printed circuit board.
weldequip
Any decent SIP dealer should be able to fix you up. You will need to quote a number from the back of the board, E****, expect to pay £40 + plus Vat.where will i get the circuit board from.
could you give me a quote on this partThe nearest I have in stock is type MIG05-00 from a Topmig 150; not sure if it will interchange or not as it's years since I dealt with SIP.
weldequip