Mark hadn't moved it.
While holding the power button, plug the TV power cord back into the wall outlet.
If you know a newer version exists but your TV cannot find it, the cause is usually a regional server delay or a network caching issue.
Running software meant for a 43-inch Vu TV on a 55-inch Vu TV can cause permanent display inversion or motherboard failure. Always verify the model code before downloading files.
Vu TV Firmware Update: Comprehensive Guide to Upgrading Your Smart TV