Sadly it didn't help by pressing the shutter button half way down or rotating the winding dial a bit. I noticed something right next to the bellow, which looks like a screw is missing. Could that be the problem?

Click image for larger version:
pix.jpg

Anyhoo, if a repair cost the double of what I paid for the camera, well then the camera would be a nice display item on my shelf No big loss of money on my budget.