Random Display Blips?

XianXi

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What causes these random things to appear on the screen? I'm guessing it's from the microbursting of the ROM access? All the roms have bypass caps already. I pulled the SRAM from the board and all of them tested good.

Let me know what you think, game is Strato Fighter. Most if the time it's on the left side of the screen looks like dots that come and go and during the intro it shows a line of them across the middle of the screen.

http://www.jamma-nation-x.com/jammax/files/videos/strato-blips.mpg

You'll probably giggle at the background music.
 
Could be a lot of different things.

Try using your WCF (Well Calibrated Finger) on various pins on the bottom of the board to see if you find one that makes the sparkles go away or get worse.
 
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