My DMR-EH50 has an issue with the DVD Drive (VXY1872), whereas it does show "LOCK" on the display, when I attempt to eject the DVD tray. The drive selected is the DVD drive, but even when the drive mode is set to eiotehr HDD or SD card it shows "LOCK" Can this be reset, are there tests, or...

I have a Pioneer VSX-LX70 from 2008 here that I now use with a new Sony TV. The Sony TV does HDMI passthrough for the audio, so I have all the devices connected to that, and then that connected to the Pioneer. Now this works great, the TV even recognizes the AMP and I can control the volume...