Old Kodak Instamatic M68 projector appears to be stuck in rewind mode. I can move the lever to reverse, still or forward but makes no difference

SOURCE: Janome Excel 5124 reverse lever

If you pull the bottom off the machine (half a dozen screws) there is a cam on the main drive shaft. The cam is probably jammed in the reverse position due to lack of lubrication on the shaft. You can move the cam back manually and it will operate in forward direction. It appears that the shaft needs lubrication.

SOURCE: Kodak Carousel 760H wont advance or reverse

Yeah. I like the $15 fix better. Go to Ebay and search for "Kodak Carousel Projector Advance Repair Kit". Before you purchase you can diagnose, and it comes with detailed instructions. The same guy also has a kits for other common problems, as well as the "tune up kit". Or you can buy the Solenoid Link, directly and try it without detailed instructions.

SOURCE: Kodak Projector 760H. Carousel won't

Chances are that your projector has a broken solenoid "link". This "Link" connects the slide change solenoid and the slide change mechanism. Over time this part becomes brittle & cracks, rendering the slide change non-functional. A pretty easy fix for an authorized repair dealer.

SOURCE: problems with using a 140 carousel on a Kodak 4600

There is nothing wrong with your slide trays. Your projector needs an adjustment to the cycle contact assembly. The constant cycle mode is a dead-giveaway. You need to take the projector to an Authorized Repair Dealer for this adjustment. Should be relatively quick - - it takes longer to get the case apart than to make the repair!

SOURCE: Kodak Carousel 760H wont advance or reverse

You have jammed the slide change mechanism. Turn the projector off. Remove the tray using the emergency release slot in the center hub of the projector. Turn the projector on and cycle it a few times in reverse, then in forward. That usually clears a mechanism jam.