Hi,
Can't be 100% certain but it probably needs a film in it to start things going.
Looking at cameras in flea markets I often find ones with a usable battery in them but without a film they don't do anything except switch on.
Nowadays I've a collection of salvaged films to test them with for a few shots and then unload manually and rewind the film back into the cassette for the next test/camera.
Regards, David