Photo 8 is the only one that has been edited in photoshop so it makes sense. It took me most of a weekend to get rid of each and very piece of dust, scratch etc.

I'm afraid I have no clue how to fix these old cameras but given how many of them that are out there and how so few people want them you could probably buy a working or refurbished one really cheap - less than the cost of repair. You could try to see if anyone has any Youtube videos on doing it yourself as an alternative.