The K2 is a great camera but should be close to 40yr old.
So many things can go wrong, specially with the humidity in NL.
I would start troubleshooting from the simplest...
- I assume you have read the manual, if not you can
find it here
- Clean the battery chamber using the eraser end of a pencil and check if it improves (I assume you used fresh LR44s even those from Action)
- Open the bottom plate and check all the wires for corrosion
- If nothing works check the
service manual here
- And if it works change the light seals
You can also look for another good camera in Marktplaats or send it to Kamera Service in ZuidHolland.
I have a KX you can borrow if you want to play.