Quote Originally Posted by vysk View Post
I bought an Olympus OM4 with a jammed film advance and shutter. The metering and battery check still worked, but the camera shutter and film are advanced and jammed, and the camera won't fire at B or 1/60 sec, the manual speeds.

Searching the web, this seems to be a common flaw in the OM4.
While any maintenance/repair advice is always welcome, the comment about it being a "common flaw" is odd. I've shot thousands of frames thru my 4 and 4Ti without a problem. And I would concur with John that this likely indicates an underlying issue that needs resolved.