Hello,
After inserting the disc, there is no full TOC reading, but the laser is set to track no. 1 and plays it for up to approx. 20 seconds. An attempt to jump to subsequent tracks causes the laser to return to track no. 1 anyway. During such attempts to "pull" the reading, a quiet knocking noise under the mechanism can still be heard. I managed to observe it and it looks like the circular gear from the laser feed motor encounters "some" resistance and jumps off the teeth of the plastic guide. If I move the gear wheel away for a moment, the laser itself moves along the metal arms of the mechanism without any resistance. I am sending a link to the video, although it is not my own, but it shows the view of the gear wheel and the guide on which this effect occurs.
I would be grateful for any tips.