Screen Trouble with MR. Do.

morbidboy

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so Mr. Do is acting up. about a week ago I had customers complain about the screen quality, but when I came by to take a look all I saw was wavy random sprites (of Mr. Do or the EXTRA monster) and a black shifting screen and the speaker was buzzing. Even though all the lights and screen works, I can't get the game to play. I thought to myself: Theres a buzzing so the speaker is ok and theres a picture on the monitor so that should be ok... so it must be the board. I ordered a new board and got it today. I put it in and the only thing that changed was the buzzing sound went away. I took a video of the screen but I don't know how to post. any help?
 
I assume you check voltages on our power supply an clean connectors.

Have you look the powers lines and see how steady the powers is. Noise power supplies will cause issues as you described.
 
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