Hello Bluray player connected to samsung tv via hdmi cable and sound via toshlink to reciever. When I switch on, the picture on the tv only appears for about 5 seconds, then disappears again and comes back. Both during set-up and when playing a disc; sound is there. Just this pulsing and no stable picture that remains! What could be the reason for this? Is there a setting or is the unit broken? Thank you for your answers in advance