SOLVED: k4900 in MCR game doing brightness rolling

arcadeaction

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Update: using a switching power supply did eliminate all of the dark rolling bands. When the opportunity comes, I'll likely install new caps/parts on the original power supply to attempt to use it once again.

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A video didn't show the effect correctly, so I made an animation that shows in better detail to get the idea across.

The monitor has just been recapped with high quality caps. I was wondering if this may be due to a ground issue somewhere or what thoughts might be.

-Basically it is showing dark horizontal bands that move down the screen, and the brightness fluctuates.
-Unplugging the marquee light did not affect it
-Adjusting the flyback screen control did not affect it
-Disconnecting the ground strap to the monitor frame did not affect it.

May this perhaps be caused by the power supply (caps/fuses in the power supply)?


Thanks

tapper-monitor-gif.607618
 

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