If you see a flickering purple or white light on your phone screen, the remote is working, and the problem likely lies with the TV's receiver programming
You can verify if the remote is actually sending a signal using your smartphone camera: tv remote dax ne 190e fixed
This article provides a step-by-step, surgical guide to diagnosing and fixing your DAX NE 190E remote control using tools you already have at home. If you see a flickering purple or white