I posses multiples of this monitor so it was easy to rule out the CCFLs by swapping power boards. The issue followed the board.
A full recap did not fix it.
Been probing between the bad board and a good one off and on for 2 days, as much as I can stand it. xfmrs, HV output caps, all 2 and 3 legged silicon all check out the same with a multimeter.
Couple hours under the microscope looking for bad joints, finally in frustration resorted to baking the board...no change.
sometimes this hobby is not so much fun
Power board in question is 4H.14W02.AF0 which is based on the more general E162030 VOL.3 design if I am guessing right. That latter google search returns many similar boards.
I am a capable board mechanic, but certainly no theory genius. I am a bit reluctant to start probing a live board without a better idea what I am looking for. Switch mode supplies frequently confound me.
Any suggestions are greatly appreciated.
board pics attached per the sticky, thank you
A full recap did not fix it.
Been probing between the bad board and a good one off and on for 2 days, as much as I can stand it. xfmrs, HV output caps, all 2 and 3 legged silicon all check out the same with a multimeter.
Couple hours under the microscope looking for bad joints, finally in frustration resorted to baking the board...no change.
sometimes this hobby is not so much fun
Power board in question is 4H.14W02.AF0 which is based on the more general E162030 VOL.3 design if I am guessing right. That latter google search returns many similar boards.
I am a capable board mechanic, but certainly no theory genius. I am a bit reluctant to start probing a live board without a better idea what I am looking for. Switch mode supplies frequently confound me.
Any suggestions are greatly appreciated.
board pics attached per the sticky, thank you
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