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I found your site confusing. If you had read my post, you would have noticed that my problem referred to a 15" flat screen 'CELLO' .TV/DVD combo. I had sound but no picture. When switched on, the screen lit up and the word CELLO appeared then the sreen went black
You have a failure in the vertical deflection circuit. This could be either a bad vertical chip, the power supply that runs the chip or a bad capacitor in that circuit. This is usually a repair best left to a professional. There is a small possibility that it could be bad solder connections. If genlty tapping the unit temporarily solves the issue you can try and resolder the pins on the vertical chip LA7841 is the part number. There is also a resistor 1 ohm 1 watt. If that resistor is open you can assume the IC is bad
IF THIS IS A LCD---TURN ON, AS NORMAL AND HAVE A SIGNAL INPUT,,CABLE ,SATELLITE CONNECTED TO THE ANTENNA INPUT .MAKE SURE YOU HEAR SOUND.. HOLD A LIGHT (THE BRIGHTER THE BETTER) IN FRONT OF THE THE SCREEN ('BOUT 3 INCHES)--IF YOU SEE A DIM PICTURE---BAD SCREEN AND THATS BIG BUCKS---IF STILL NO PICTURE--CIRCUIT BOARDS AND USUALLY THATS BIG BUCKS!! GOOD LUCK
If the picture is closing (top to bottom) and goes back to normal when you hit it you probably have a bad solder connection on IC501 (location number) the vertical deflection IC on a metal heat sink. If you mean outwards as in side to side as it looks in the picture, I don't know specifically where to solder but get a magnifying glass and look for suspected bad solder connections. Look for the word width if it is there. It is good that you a confident in soldering.
if tv have black screen,increse screen control to see vert ic is defective,and if screen is white with lots of line acrose ,you can find open resister,on pic tube board,or in main board near transformer.