wg 4900

beeman8

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can any body tell me why this monitor is doing this on cross hatch has two line that are out and on the color pattern has a bright line the chassis has a cap kit into it and a tube swap
 

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you might not have the right yoke for the chassis, there are a few variations of the 4900. try shrinking the vertical size.
 
Looks like vertical foldover to me. Can you adjust the vertical size and get the effect to decrease? If so, you have foldover and need to see which component has drifted/failed.

Edit: did not read the post directly above- Doh!

At this point I would say that sometimes the tube swap chassis/yoke/crt combo just doesn't work perfectly. Try another crt or the original yoke.
 
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