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John Nieznanski Posted on Nov 11, 2006
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Zenith 25" Color TV - Model A25A23W

Color is overly green. Will intermittently correct itself back to a normal color temporarily, then revert to excess green condition. Color will cycle back and forth between normal color and greenish color, but remains overly green most of the time.

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  • Master 3,130 Answers
  • Posted on Nov 12, 2006
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Joined: Mar 22, 2006
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Your problem is a bad connection on the CRT socket on the CRT driver board, a bad connection in the RGB driver supply from the video jungle IC or maybe even an intermittant Picture tube. the only way to tell would be to tap on the crt board while the sets playing with a non conductive insterment, and see if it changes. Now there is alot of HIGH VOLTAGE at this spot, so if you have no TV repoair experience Please stay safe and call in a pro to assist you. Good Luck Please dont forget to rate this thread.

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Initially, your described problem indicates that one of 3 color drive transistors (for the green) has developed either a cold solder (most likely) or an intermittent internal fault (leak). These transistors (or in some cases a single power pack module/IC) are normally found on a small squarish PCB (printed circuit board) at the very rear of the picture tube (CRT). At times, the green blank screen would also have diagonal fine lines or would appear to be overly bright.

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