Doug posted an answer for this Olympus Cameras:
"sounds like you dropped the camera and the case has split apart ..... remove visible..."
Doug posted an answer for this Yamaha Music:
"maybe this will help ...... I have a Korg M1 ..... it has a small button battery for..."
Doug posted an answer for this Sony RDR-VX500 DVD Recorder/VCR:
"DVD-Rs do work with the RDR-VX500 ...... I had not recorded on mine for a few months after..."