The program does not go to NOACK at all, thats why i put the END in there to stop the program just to make sure. I can unplug the the I2C lcd controller and the led still blinks all the time. I do not have a scope. As far as the contrast and brightness, I just threw them in there but thanks for pointing it out. SCL and SDA lines are pulled high with a 4.7K resistor.