My 13" craig tv is

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Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.
Type in the brand name of your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts. It will make surf easy.

Make sure that the sound output connectors (the red and white ones) are correctly plugged in (the colours corresponding at both ends of the 3-headed cable) and that the sound volume in the ATT box is almost to the max.

YES.
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Are you using a cable box? If so, what kind of cable do you have going from the box to the TV?

do you have av plugs on the tv? if so use the av wire jumpers white to white,yellow to yellow, red to red

This is definitely a problem you don't want to tackle at home. TV's are made to kick off when it knows a problem exists. The warped pic is a "convergence IC" issue. That IC needs to be replaced by a tech, either in home or in shop.

What you all need to do is get away from a coax cable connection. If you have a cable box, or satellite box, take the coax cable off and use red, white, n yellow rca composite cables to connect your recievers to the tv. if you dont have a cable box, either get one, or get a converter box and use a tuner outside of the tuner within the unit. The tuners in those tv's are built to show you when you experience signal fluctation(which is normal with a coax cable) and thats why the box keeps popping up on its own. good louck to you all with this problem

That means that there are solid state components on a printed circuit board that are soldered into place. If the set is a 13 inch it would not be feasable to drop any cash into it as there are 13 inch combo TV sets going for as little as 59 bucks. Good Luck