I bought a bronica etrs about a month ago. It had been working fine till a couple days ago that I noticed. Now the shutter speed wont physically change no matter what speed the dial is at. Since I had already ran a few rolls through it and even checked the shutter when I first got it. I thought the battery might of died and it was running on the mechanical 1/500th. But I bought a new battery for it and the shutter still doesn't work properly. It appears to be firing on a consistent shutter speed and the aperture does close properly. But there is a red light that appears on the bottom right of the viewfinder showing that the battery is making contact.I tried two methods to check if its a problem with the lens or body and they're both working properly. I had read online that its good to use a silver oxide battery but when my camera worked it used a lithium battery. I'd rather not send it out to get it a CLA since that'll cost more than a new lens or body. Has anybody had this problem and found a way to fix it?