the playback screen on the side is not working.when playing back a recording the sound works and the touch screen buttons are still working. but not the picture. only way to view the playback is through the viewfinder on top of the camera. it still records perfectly but nothing shows on the side screen just through viewfinder when the screen is closed. is it possible it was turned off accidentaly or would a bulb or backlight be gone? if so is it repairable? thanks.