Unless it is a reflection of another TV, you can't. Maybe the screen isn't blank?
If your Westinghouse TV has a blank white screen, it is caused by an interruption of the electrical signal. You will need to unplug everything and plug it back in to make sure everything is connected.
If you lose the picture after 20 seconds but still see the raster, there's probably a problem in the tuning circuit. And nothing you can fix. You've got a lemon. Hopefully, it's still under warranty.
It's a fault that's not always present - otherwise known as an 'intermittent fault' for example, a TV screen may work fine when first switched on, but as it 'warms up', it goes blank - indicating a 'dry-joint'
A local TV repair service facility should be able to take care of this for you.
You should clean the front of the TV with a soft, damp cloth. The use of a mild soap for heavy cleaning is acceptable. I love the look of my flat screen TV. You should use a soft cloth to clean the dust from the screen.
Try plugging in a vga plug in the laptop into a tv or a screen.
My tv will turn on and you get (PLEASE WAIT) THEN YOU GET ONE CHannel 132. BUT BLANK SCREEN AND REMOTE WILL NOT Work we can,t turn off the tv or Chang STATIONS.tHATS ALL YOU GET,WILL HAVE TO UNPLUG FROMWALL TO TURN OFF. [PLERASE
A 70'' TV– You should sit between 9 and 14.5 feet away from the screen. A 75'' TV– You should sit between 9.5 and 15.5 feet away from the screen.
I prefer a television or a movie screen.
1080p signal may not work on a 1080i TV set. You may not get a picture, but just a blank screen. And that blank screen will not let you undo the changes because you cannot see anything on the screen. In this case, you may have to make an analog connection, such as a composite video connection, to your TV set just to undo the changes you have made. Or you have to press a combination of buttons on the 1080p signal source to restore the picture. I suggest you read the documentation that came with your 1080p signal source.