Type... its a stick welder uses welding rods up to about 2.5 mm
if it was me i would...
Pull the cover off and make sure nothing shows signs of being overheated or melted.
then i would have someone that knows what he is doing put a new plug on the end of that power lead and test it to make sure that the earth has a good connection to the welder
Check that both of the welding cables have a good connection to there respective ends, and lay them on the something that is not conductive ie:- the concrete and and not anywhere near each other
.
Plug the power lead into a RCD protected power outlet and turn the welder on.
If this goes well
Hook the earth lead to a piece of steel, put a welding rod into the hand piece put on some gloves and a welding helmet. i will assume you are wearing long cotton work clothes... and strike an arc between the rod and the steel.
Plenty of things can stop it from working , most are a job for a Technician, if your lucky there might be a fuse near where the power lead goes into the welder or on the motherboard near where the power lead attaches, you can try looking for that and checking the fuse.
