So I just adquired this minty OM-2n, it's in beautiful condition and everything seems to work, except the Manual mode. Basically the manual mode acts exactly the same as Auto mode. It doesn't care what shutter speed I choose, it will fire according to the light it's receiving. I bought 2 new SR44 batteries by Duracell to see if this fixed it but it doesn't. Same result (but accurate readings on the needle). The mode selection lever works as intended since I can see the change in the viewfinder when I go through all the 3 modes, and the Bulb mode works as intended too. I searched everywhere and noone seemed to have this specific problem except 1 video on youtube that was posted a decade ago. I paid quite a bit for this camera (imported from Germany) because it's in such nice cosmetic shape, and I also live in a small town with no repair shops around. Do you guys have any idea of what I could do to fix this? Thank you.