I recently bought 2x gh4's that required some tlc. Have got one fully working, however the LCD image will not rotate when the screen is flipped out, and goes black when flipped out, 180'd and pressed back against the camera. (So the glass screen itself is facing you behind the camera controls). Any tips? im wondering if a new flex cable is the culprit...but the lcd screen does work fine otherwise - touch/image etc. Think ive tried all resets.