I HAVE A 35INCH MODEL AND THE FOCUS SCREW WAS NEAR THE BOTTOM OF THE RED CABLE. I USED IT TO SHARPEN AND FOCUS THE PICTURE. MY SCREEN WAS BLINKING CONSTANTLY AND I ADJUSTED THE SCREEN SCREW LOCATED BEHIND ONE OF THE CIRCUIT BOARDS. I DO NOT KNOW WHAT TO CALL THE CIRCUIT BOARD, BUT IT IS AT THE VERY BACK OF THE TV WHERE CONNECTED TO THE TUBE. TV IS WORKING WELL SO FAR, YOU HAVE TO TWEEK THE SCREEN SCREW EVER SO SLIGHTLY TO GET IT RIGHT. THANKS FOR THE GREAT ADVICE. I DO NOT NEED TO BY A TV; AT LEAST RIGHT AWAY.

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