Holmburgers ,
I bought Rollei 35 S few weeks ago and same problem.
It takes 120 dollars to 120 euros to repair.
Someone told me it is may be water contact.
Its a good camera but absolutely no Leica.
Its very hard to find a shop develop with fresh soup without replenisher.
They are selling kodak film with lots of russian and I didnt like it.
Negatives received too light cause of faster shutter speeds need.
But It took my best nature photograph ever also.
Frankly , I dont like Zeiss highlights on face shots , they appear withouıt any details at highlights. I am missing my Summicron gives cream de la cream skin tones , excellent reds , oranges , blacks and greys.
I will try with ektachrome and plus x in weston pyro abc.
I have no money and craving here. It kills the art.
I think you have no chance to repair the camera without new replacements parts. Its a very small camera and complex. So need someone who needs to much money like me or who loves these cameras very much.
There is a Aermenian at my 35 post below and he says fixing could cost 75 dollars with new parts change.
Ask him.
He only quotes when he sees the camera. New York is his city , NJ.