I have the Panasonic DMR EZ475 unit for about a year. Today when I tried to open the DVD tray by pressing the OPEN/CLOSE button nothing seems to happen... no motor sound at all. Upon performing a cycle power, the display indicates NODISC. Upon pressing the OPEN/CLOSE button, the display show OPEN but no motor sound and tray still closed. The OPEN status stayed on for about 20 seconds and then return back to NODISC. When repeating the about step, before 20 seconds elapsed, pressing the OPEN/CLOSE button again the display shows CLOSE although nothing happened. By pressing the button again it will show OPEN. I have followed various suggestions on other threads in taking the unit apart opening and closing the tray manually, and cleaning the spindle and lens but the end result is still the same.
Is it possible that the open or the close sensor have failed? I don't really know where the sensors are located. Any suggestions? It seems like the 20 seconds is some timeout period for trying to open or close the tray before going back to the NODISC message. Is it possible the motor has gone bad? Anyone has schematic on the drive?
Thanks in advance on any advise or suggestions?