K900 side of screen dark

newthing34

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Donor 7 years: 2013, 2020-2025
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I just got a joust that has a k4900
the left side of the screen is dark.
anyone have an idea where to start

Thanks
 
Security0001 is a great guy for parts. Deffo cap it good to know also other monitors do it too, I've seen it on a sanyo 20ez.
 
Joust cap kit k4900

Thank you guys
now I have a nice bright monitor.
BUT a new problem started after I did the cap kit.
A line of colors on the top of the screen. See pic
any ideas ???
 

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that's normal on Joust.

the Williams hardware platform all those games ran on exhibit that.

it's apparently some kind of glitch with the video ram if I recall.
 
Trust me. It's a known problem originating on the Williams game boards. At one time Williams issued a service bulletin which said to simply adjust the monitor's "Vertical Height" or "Vertical Size" to stretch the picture slightly over size to hide the problem.
 
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