look for a tiny pin hole on the front of the dvd played some have one and some dont, if it has one then put a needle in the hole and push it in so it releases the eject mechanism, if it dosent then its more complicated and requires a partcial stripdown and requires a suitable engineer to remove it. it can be a number of things ie a broken ruubber belt, faulty pcb(circuit board), or a stuck mechanism etc etc
t pots, December 2007