The lower 1/3 of TV screen is darker

The lower 1/3 of TV screen is darker

the lower 1/3 of TV screen is darker

ANSWERS:

@billb could be a backlight issue as well as a bad panel. Post some images of what your panel looks like with your question. For that use this guide. Let us know what model your Vizio is and remove the back to take a look at the power board. Check for anything odd looking like domed or leaking caps. That is most likely where the error originates from