I have been running an Onkyo receiver connected to my Panasonic Vierra Full HD TV and to a Toshiba BluRay player via HDMI cables for most of this year with excellent results.

The other evening while watching a Bluray movie, the receiver switched off automatically (as did the TV) halfway through the movie.

Since then , whenever I try to play a DVD or Bluray disc, the receiver defaults to "Tape" on the display screen and as a result , I am getting no picture or sound.

If I choose the BD/DVD input selection, the Bluray player stops playing.

The Toshiba player still plays a disc fine , the TV still works perfectly and the receiver still goes fine (ie when listening to radio or any other sound source such as my PC)

I have checked all the settings for the HDMI Input on the receiver's setup menu (I can only bring this menu up on the receiver's display and no longer on the tv)  and they are the same as before.

Can anyone shed any light on what might be wrong?