Hi welcome to just answer.
When you press fast forward, what happens?
When you changed the belts, how many belts did you changed? We're the belt the correct size? Did you check the springs that pulls the tape tranport?
Did you changed the pinch roller
I would check and compress the springs. Also with age, the pinch roller gets harder and visually you cannot tell as the rubber hardens over time.
You can check it and let me know the result.
No east also. Good night.
Let me know the results
Ok they will help. We also schedule phone call if that would help.
Ok. You can also change the roller if you have one.also sometimes the motor becomes weak and does not pull the same as a new motor.