Are you looking at the yellowish schematic that's for the dev board or my frittzing schematic?
The voit from the DAC is not connected to the LED or resistor. The LED is getting a pwm signal from pin 9 if my memory's correct.
There DAC is connected to pins a4 & a5. So the LED and resistor have no connection.
I can certainly remove them and see if it works, but I don't see how.