WOW! A Commodore 1084S monitor... Don't laugh.. I have the same monitor since 1991 and is working normal, with no service...
ditto 1084S-D2 currently being used for my Gamecube and DVD player. Watching an Adam Sandler flick onit this very moment.
cost me $169 us when I bought it,(possibly safe harbor or some such place) $80 wouldn't touch it now, in fact you may have to pry it from my cold dead fingers some day.