what can i do to get my dvd recorder to work?

i have a tevion tdr 5101 dvd recorder.i recently put a pre recorded disc in,tray retracted and normaly a high pitched wine is heard but this time nothing.disc not loading but screen says it is.i tried to eject but nothing happened,i managed to get disc out by removing cover&taking disc out manualy.now tray wont open at all.as i have a few discs to finalise i need to be able to get recorder to work to finalise unless i can do it someother way