I realize this is an 11-year old thread, but I have the same problem and wondering if you (or anyone else) found a solution? I believe my Elunevision screen is a Luna from around 2006. The remote is IR (infrared), not RF like some of their current models. I replaced the battery with a new one and no change. The red LED light on the remote doesn't light up when any button is pressed. I don't know if Elunevision still sells this or a compatible one - I'm waiting to hear from them. With nothing to lose, I took the remote apart and it looks pretty simple with a single chip, the 3 buttons, LED indicator, IR emitter, 4 resistors, and (I think) a capacitor. If I can't get a code to somehow use a universal remote, does anyone know how difficult it might be to have someone repair this one?