Hi
Did anyone already enter in the service menu in order to verify the signal information ? I've connected my 4K receiver (orange UHD) on HDMI 1 socket and choose an UHD channel and the input resolution is 3840x2160p (page 1) & output resolution only 1920x1080p (page 2)... So I don't know if I 'may really looking at 4K resolution...
To enter in the service menu : press menu then choose configuration then quickly press red then go buttons.