wg 4600 acting up!

paul400

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i have a wg4626 in my mr. do. it keeps flickering from dark back to normal.dark meaning darker. it was doing it pre cap kit and post cap kit. replaced the pot that came with the kit on the daughter board. i quess i should reflow the header pins and maybe replace the pot on the neck board? if availble. anything else i should address while im in there?
 
Cold solder joints on all three of the daughter boards (power supply, video interface, and hor/ver deflection) as well as the male header pins for those boards on the main board.
 
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