I changed out mine on Magna 6298. With the TV down in the view position you will see very small screws all around the outside of the cream colored molded piece right adjacent to the ceiling piece. remove those screws and the ceiling panel will come off. That exposes the metal mounting frame. All should be obvious after that. If the original monitor is still there beware. It is very heavy. Good luck.
George in Birmingham
'03 Magna 6298