My players started to have problems playing any DVD. Basically what happens is he DVD will play fine for an unspecified amount fo time, say between 10-45 mis. Then it will either freeze or reboot to the main screen sometimes displaying an error. After this, if I try to play the DVD again, it will freeze very early on and will just display error on the screen. Eventually it will completely lock up. Only a hard reset will fix this. FWIW it's a Yamaha S520 player and it's had very light use (maybe 10 DVD's a month tops, I've had it about 2 1/2 years (I think). I've tried a lens cleaner but no joy Anybody have any suggestions? At first I just assumed lens but could it be some sort of overheating issue???