You can use a camera or your phone's camera to check the remotes. In camera mode, aim the remote at the camera lens and push a button on the remote. If the remote shows a light, it is working, no light, batteries dead or a bad remote. If your tv is not working from two different remotes, I suspect a problem with the tv. Try to find the remote sensor on the front of the tv and make sure it's not blocked by something.
Charlie & Lizzie the Mini Dachshunds
2008 Jayco Eagle Super Lite 30.5 RLS
2015 F350 Lariet Crew Cab Long Bed 6.7 Diesel B&W Companion Hitch
24 hours in a day, 24 beers in a case. Coincidence? I think not.