Check the batteries of your Magnavox NE001UD remote control if it is entirely unresponsive. Turn the remote over and locate the back battery panel at the bottom rear of the remote. Pull up on the battery cover's latch to remove the cover and access the batteries.
Remove both batteries and replace them with new AA batteries. Ensure that you insert the batteries correctly by noting the polarization label in the battery compartment and matching the positive and negative ends accordingly. Replace the battery cover.
Reprogram your Magnavox NE001UD remote control if it continues to be unresponsive even after replacing the batteries. Press and hold down the remote's "Setup" button. The LED light on the controller will flash and remain on. Once the light remains on, release the "Setup" button.
Push the "TV" button on the remote control. Press the "Power" button on the remote multiple times until the television powers off. This could take as many as a dozen button presses.
Press the "Enter" button on your Magnavox NE001UD remote control once the TV powers off. This finishes the reprogramming of your remote control, which should resolve the issue.