If its a faulty drive try this.
Remove the top of the unit, using the appropriate-sized Philips screwdriver. Consult the manufacturer's warranty details to determine if this will void it.
Apply power to the unit, and eject the tray. Lay two paper towels over the internals of the unit, with the paper resting on the sides of the chassis. Power will remain on during this procedure.
Spray three short bursts of WD-40 (or similar lubricant) under the plastic disc that grabs the DVD
and pulls it into the motor and drive shaft (it will be a quarter-sized black or gray disc that is attached to the spindle motor). Let settle for a few seconds.
Place a commercial DVD into the tray, and allow it to spin up. If it does not, your player may require professional service.
Gently clean up excess lubricant sling (throw off that occurs when the motor spins up) with paper towels and cotton swabs, paying special attention to the laser assembly.
Re-attach the top of the unit.
do not let any spray get on to the little lens that reads the disc.
or you could try just buying a lens cleaning disc and see if that works first.