Hi there, I have a serious problem with my Marantz NR1603. I just bought it and it ran about 1.5 days. While watching a movie it shut down and the red standy-by LED blinked twice every second... I turned it back on and after 5 minutes it shut down again. Unfortunatly it never powered up since. Every time the relay "plops" it shuts down and the LED starts to flash. I had it repaired and the digital board got switched because it was damaged. As soon as I got it back, I hooked it up again and after 10 minutes or so... it shut down again I have no idea what might be causing the problem... any suggestions?