Rapid scroll of star-field on Galaxian board

Did this ever get resolved? Im having the same issue.

It's looking like chip 2B, I just tested the outputs on it on a board with this problem (fast random moving star pattern with too many stars) and there are no outputs from the 74 366 chip when tested against a known good working board.

I'm going to order a replacement and replace the chip - let you know what happens.
 
Are you using it with factory power supply or switcher. I was running mine on a test bench with a switcher and voltage was 4.6 I upped the voltage to 5.1 and problem went away
 
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