I have the same problem with my Alba DVD74, quite stuck with it and don't have any spare parts, I opened it up and everything looks alright, but I have metered anything and I'm not totally clued up on measuring voltages etc, so will try and see what the locals on freecycle can provide for me..
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix dvd players.