Les Sarile , Nov 10, 2011; 08:59 p.m.
I just checked my OM-2 and believe these two act similarly but am not clear about what you are doing.
You said you used no film but advanced and fired the shutter until it got to the end. End of what exactly when there is no film?
I don't believe the reset caused your OM2 to jam. However, dead batteries will. You do know that if the batter is dead, the mirror will lock up and won't come back down to allow you to cock the shutter to fire again? If this is the case, you can turn the shutter speed to "B" which is the only manual shutter mode and will release the mirror. To turn to B, you will have to press the "B lock" switch. At this point you can activate the shutter and fire again but at B. Of course replacing the batteries will restore it back to normal operation.