I have a sanyo 1080p dp42840 tv. I also have new apple tv. They worked perfectly together. My speakers went bad and I took the tv to a repair shop. They had to replace speakers and main pcb. Now when I hook up atv, it gives me a purple screen. If I change the output on hdmi for atv from ypbpr to rgb it will work but the quality sucks. I need to call the repair shop in the morning and describe this. Is the issue that perhaps they messed up with install of main pcb and that affects the hdmi output of ypbpr?