So this is what I learned. Both the internal battery (a button cell of 2025 type) and the external 2CR5 have to be fully charged for the camera to operate. In my case, the internal battery is out of juice and I need to get a technician to replace the internal battery as it takes some skill getting to that part inside the cam. What a ridiculous feature Yashica put in it…
You can replace the internal battery at home if you are comfortable taking a small piece of the camera apart. It’s the port just underneath the zoom buttons. The battery is a common one. See “fixing blinking LCD” above. But I can’t promise it’ll fix the full functionality as it may be something else.
