If the dark slide is still in you should have no problem taking the magazine off. If it does not work, do not force it either! To be safe, put the LOT-Lever to L before you remove it. After the camera is "naked" put both the LOT lever and the mode dial to "O". It should work than. Otherwise the battery is empty, the adapter is faulty or the camera is broken. I doubt the latter. The motor should at least start buzzing as soon as there is some power source.