The display on the cd player says " no Disk " suggesting that no cd is in the player. I have removed the cover to the player and can see that the disk is spinning above the laser. I suspect that there is a sensor malfunctioning and not detecting the presence of the cd. Can anyone suggest the cause of this problem? Is the laser itself the sensor and it is what has gone bad? Your expertise is appreciated. I inheritated the unit from the in-laws and would like to revive it. THANKS