Bought 65" LG OLED 4k television with magic remote. Paired without incident until yesterday, turned on tv working fine, went to change channels after watching for half hour or so and nothing, no light no anything, no writing across the screen. First thought was dead batteries, replaced with a pair of fresh AA Energizers, still nothing. No matter what I do, the magic remote acts as if it is DOA. Any help would be greatly appreciated