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NBA Jam Monitor Issue

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Question from David: Hey, thanks in advance for any advice on this! I’ve spent some time watching some of the youtube videos, and still haven’t found something like this. My roommate and I got an old NBA Jam cabinet that wasn’t working, and have got it pretty much operational. The one issue we have is that the top of the screen looks wavy. We’ve played with the adjustment knobs, but it didn’t seem to fix it. I’ve attached a picture, and you’ll see that the image is distorted at the top.

Any ideas? Thanks again!
David

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Tim Peterson Tim Peterson ⋅ Staff January 16, 2011
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Response from Tim: That kind of wave looks more like an interference issue….maybe the power supply or speakers too close to the monitor. You might try and remove the speaker and see if the problem goes away. Did the game look like this when you bought it?
Tim

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