Doorbell pro issues

Set up the doorbell pro Monday with our existing doorbell wires. App and video worked great for 3 days. We head out to vacation Thursday and low and behold, cant connect anymore. Got home today and it has a pulsing white light. Looking on the internet I see it may be a transformer issue. The house is 20 years old so I went and replaced the transformer with a brand new one with 16v. Power the unit back up and it comes up with the same pulsing white light. Have double checked the power pak and it is installed. I've held the reset button on the side for a minute with no luck. I can press the button and it immediately turns blue and rings the door bell inside but then switches back to a pulsing white light. I can't even get back to setting it up after scanning it since it will never show the circling white light. Not sure what route to take next.