Sony BDP-S360 DVD Player "quot valid disc" Questions

quot;no valid disc"? It played just fine yesterday and is now fully charged. We tried 3 different dvd's and keep getting the same message today. Please advise. Thanks. It is likely either

quot; on blank discs The LVW-5005 DVD Recorder came with a list of recommended brands for each type of disc, and they are all different in all categories. Some brands are recommended for CDs, some for

...quot;No Valid Disc". And I push the disk to make sure it's snapped in and it is. In most cases when the CD does not play it is possible that the optical head is a suspect. Sometimes it might ...