RCA D52W20 Green Light

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GregSheu
RCA D52W20 Green Light

Have a RCA D52W20 the went went dead.  Green light came on for 3-4sec the off.  Tracked down the the Green CRT board and disconnected the Green.  The red and Blue would come on and stay on so I replaced the Green CRT board.  The Red and Blue would still come on with the Green CRT board connected but no Green light.  I replaced the Green tube thinking the bulb went out taking the CRT with it but no luck.  Am I missing something that controls the Green. 

 

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