I have a Panasonic DMR EH50 which has no sound being output whatsoever - whether from feeding through a tv signal or simply playing a DVD. I'm pretty certain it's not simply a connection issue, or even a particular issue with a specific output connection as I've tried connecting via scart and also by Audio Video and RF options. Does anyone know if there is anything on the circuit board/connections internally that might be causing this? I've looked at basic things like the capacitors and all look fine. Thanks.