MY PHILLIPS RADIO

If a CD player doesn't work there isn't much the user can do - putting in a disc the mechanism should be heard to spin; if it doesn't spin the process will go no further and it is a task for the repair shop.

If the disc does spin the laser will try to read the disc and if it fails it will be worth cleaning the lens but again if that doesn't work the repair shop beckons.
I have never seen the DEF message and don't know what it means unless it is an abbreviation of defective...

This is usually cased because the unit is sensing that your spindle motor is not turning or turning at a slower speed then normal. "The spindle motor is the motor that spins the disc. This is the most common problem found in DVD and CD players.

Buy a cleaning disc for your Bose system and also make sure that the CD doesn't have any dust or dirt on it. It should read the disc afterwards.

sounds like the lens is dirty buy a disk cleaning kit around 8 bucks this sholuld fix the problem lens is dirty

I've been able to prolong the life on mine by doing this:

Insert the disc, then spin it by hand and quickly close the door and hit play.

It's always worth using a laser cleaner first, as it may just be dirty and stops spinning because it cannot read the disc.

You can buy new DVD pickups online for about 15-20 It will take a very small phillips screwdriver and needlenose pliers to change out the old one

My Bose Wave Radio/CD developed this problem about a year ago. I don't use the CD player much and kept the unit clean. The disc spins but, the system does not read it. Cleaning the lens with cotton did not help.

Read that Bose charges $75 to fix this problem.

i would say that your lense is dirty and yes cleaning it might help

Your pickup is bad. Take it to a servicer for replacement or try to find one online.

try to use phillips discs