Chosen Solution

We tried to unplugged and plugged again but still the screen is black

Turn the TV on. Plug in your input device. Cable box. Or Xbox Console. Use a flashlight. Hold close to the screen. You should be able to see a picture. If you do. The back light. Of the television. Is bad That can be fixed. Relatively easily. Depending on television. If you do not see a picture. Display is bad. Too expensive.

OK I see a picture so what I do next