This DVD player has a strange fault. There is a motor which, via a
belt, closes the drawer and, upon doing so, then raises the laser
block. However, this motor does not switch off upon completion of the
sequence, and nor does it reverse direction if eject is pressed - so
you have to manually remove the disc.

There are no sensors at all on this part of the mech, no leaf
switches to indicate the drawer is closed. Not only that, but the
motor is fed directly from the power supply pcb.

Any thoughts before I dig further into that pcb?
TIA
-B