I've been trying to repair the mirror in an olympus om 1n. The issue is that the mirror will not flip up when it should be. I've read the repair manual and other texts on this matter and have fully taken apart the mirror box. I have also applied a small amount of camera grease to each of the pivot points that are used when the mirror should flip up. I'll include a photo below that shows the isolated issue. The red arrow in the photo shows the direction that the lever should be moving, but for some reason it gets caught and doesn't travel all the way. The blue circle is where I have since applied some camera grease. There is nothing else that I can try that seems to make sense to me, so I'm hoping that someone here will be able to point me in the right direction!