CD Player Tray
Problem: CD player would not play
Solution: Replace belt and lubricate mechanism
Brand: Denon
Cost new: £150
Cost of fix: 0p
Age: 5yrs
Success?: Yes
"Customer brought in a CD player that wouldn't play a CD and would just keep sticking. It would open and receive a CD, but then would get stuck on track 1 and never play. Turns out running the mechanism with the shell off revealed that the tilt mechanism to engage the motor wasn't being activated properly. The belt that had the job to activate the mechanism to tilt was just spinning in place and never being activated. Replaced the belt with a suitable one and added some drops of oil on the plastic parts that wipe together and it loads and plays CDs correctly!" 
