The reason the player will not play a disc is probably because the disc is not spinning. You need to power up the player and leave the dvd door open. Then push in the little switch that is normally operated by the dvd door but make sure you do not look directly at the laser. You should see the logo on the screen saying loading but the turntable is probably not turning. If this is the case, then the most likely cause is that the motor control chip inside the dvd is blown. This seems to be quite a common feature of these type of players.