I can only change sources if it shows "1 2 3" or if zone 1 is flashing after pressing amp. If I press the amp again and it shows Zone2, Z3 or Z4 it won't work.

Otherwise you are trying to change sources for zone 2 (if you have it assigned to one of the speaker terminals on the back), or zone 3 or 4 (which don't exist on the 3808). If one of the other buttons is flashing (sat, tuner, ect.) then you are not changing sources but pressing the numerical key to enter a channel or a radio preset/ ect.


-David