Although they are high-precision optical devices, most compact disc players provide trouble-free operation for years if they aren’t abused. When something does go wrong, it’s often an easy fix.
Intermittent or No Sound, Weak Volume, Poor Sound Quality. Check all cable connections to make sure they're secure. Replace the cable connecting the CD unit to your receiver. Clean the contacts on the player and receiver with electronics-grade contact cleaner.
Problems With Door Opening or Closing. Make sure the drawer-loading belt is still tight and elastic. If not, it can be replaced with a belt obtained from an electronic-parts supplier. The replacement should be of equal or slightly greater thickness and should fit snugly but not so tightly that it strains the motor. Check for broken or loose gears and have them replaced. Check for obvious sources of contamination such as pet hair or foreign objects that are preventing smooth operation of moving parts. Small children have a habit of inserting items into CD players. Use electronics-grade contact cleaner to clean the door-position contacts.