Picture has a black image (box that black out part of the screen) that comes on seconds after TV is turned on, leaves when volume is adjusted, then returns after a few seconds. Does not appear when Wii is being played, only TV

It is a Text or Description box that operates like Closed Captions. Cycle through the options by pressing the Caption button on the remote or go to the Caption menu and turn it off.

tv has a blanking picture mute circuit. adjust the screen controls which are located behind the speaker grill in front of set. there will be a access panel to unscrew in center and then you will see a black 4 inch square box with 6 physical knobs. 3 control screen the other 3 controls focus for red, green, blue. turn them down and slowly start turning them up. fixed.

Check your closed-caption settings and make sure it's turned off. You'll probably find it's now set to text mode. The set is blanking out the part of the screen where text would be displayed, but there isn't any.

It's a text box for either closed captioning or demonstration mode. Go into the setup menu and turn off closed captioning. If you have trouble doing that, then just restore factory settings.

you need to adjust the screen voltage. behind the front grille and inside cover. a small black box 6 adjusters protruding from it. only adjust the the color counterclockwise that matches the problem in this case it's the green so look for the knob with "G" marked by it. there are 2 with "g" marked by them the row across the top of the box are for focus don't adjust. back the knob off untill the raster is blank with your input set to an inactive input, the picture should be blank and black.
when it is you have the adjuster close to where it should be, now change the input to an active signal and turn the color off so that you wil have black and white picture. adjust that knob untill you do have a truely black and white picture not too green or red or blue. go back to inactive video input and check that there are no lines of any color on the screen. repeat if needed. always adjust these knobs slowly the set will be watching you ! if your autofocus won't work now you have the adjustment set too low. check this function before putting back together again. these adjustments can be real touchy so be patient

use your remote then turn off the text messege of your tv.the black screen that you seen is for the messege but since their is no message written in the box ,that's why you see a black box.

Go into the menu and find "closed captions. Once there, turn off the "text" function. If you don't use closed captions, turn it all off. This will make your box go away. Let me know if I can be of further assistance

if yo know how to solder , re solder your tv, second adjust the IF transformer by using the plastic or wood stick. IF transformer is looks like a cube made of metal with an adjustment screw at the top. try to adjust it and observe what happen.

You will need to find the close caption feature in the menu adjustments and turn it OFF. You should do it for all the individual channels that have it activated.

The black box your are seeing on the screen is the box to display text. It is listed under your "cc" closed captioning setting as T1, T2 etc. Go into your closed captioning and shut off the text. You can still leave closed captioning on or off. The text system was never really used but they put it on all of the TV's.