Wired shimmer on AD vector only at high score display

jtslade69

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{video now Uploaded} shimmer on AD vector only at high score display

What could be causing this weird shimmering on the left side during high score entry and display????

Any ideas, picture is attachedImageUploadedByTapatalk1360720723.998306.jpg
 
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Is this a cap issue? Do I need to check the power with a mm ?

Any help would be appreciated, maybe other vectors have had similar problems?
 
It's impossible to tell what's happening from a still image. Post a video.

Also, standard advice: Reflow your deflection board headers, and look to see if the spotkiller is flashing on and off. If it is, recap the board.
 
I'm guessing here from the image, but the left side of the text looks fuzzy, which is probably because it is strobing.

I'm not good on monitors (still learning), but it doesn't seem like it would be a game board issue - I'd speculate that you might need to re-cap the monitor - when you load up the driver, it starts to get weak on the left side of the screen.
 
I'm guessing here from the image, but the left side of the text looks fuzzy, which is probably because it is strobing.

I'm not good on monitors (still learning), but it doesn't seem like it would be a game board issue - I'd speculate that you might need to re-cap the monitor - when you load up the driver, it starts to get weak on the left side of the screen.

It is impossible to tell without seeing what is going on, which the photo doesn't show. Vector game PCB issues can absolutely cause weird display problems you wouldn't expect. For example, I recently fixed an Asteroids with a bad DAC that caused foldover in the center of the display. The replacement DAC was defective and caused jagged, unstable vectors to be drawn — but only on the far right edge of the display.

It isn't impossible for an XY transistor to fail only under load, but it is uncommon. More often you will see them completely fail (H and/or V collapse) or short one way or the other (missing screen in quarters). It's also common for passive components in the preamp circuits to fail and drive them wrong. So an open pulldown resistor means it can't swing negative and deflect into the lower right, and all you get is image way up in the upper-right, off the surface of the tube. Or a diode shorts open, causing partial collapse.
 
So, it was what I thought - the left side was strobing.

However, Ieure was right - it could be the game board. You can see (thanks to the video) the retrace lines, and the shimmer seems to be syncing with the retrace lines.
 
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