Have TV Questions? Ask a TV Technician
Hello and sorry you're having problems. The screen going black is either an issue with the "Source" (meaning the cable/SAT box or connecting cable), or a hardware fault within the TV itself. To rule this out please grab the original Vizio remote and press MENU. When the screen goes black will the MENU display on the screen?
If the native MENU will not display then this indicates a hardware fault in the set.
Please shut the lights off in the room and tell me if the TV's backlights are on- meaning the screen is still lit. Then I can locate the replacement part for you.
This means the power supply/LED board needs to be replaced.
I just did, it is posted above. Please scroll up the page just above your last reply.