Lazer Ball question

zappaf19

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Joined
Dec 23, 2008
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Monticello, Indiana
We have replaced ram, Batteries, ic 5101 ram and then only every other didget worked and ic 18 pio pin 2 was always low so replaced ic 18 and got the same thing. So we replaced ic 6 muliplexer and still have same thing. Thats where we are at. The trace is only 2" long and the traces are good. I'm stumped.
Bill
 
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