Williams System 6 - Gorgar CPU issue

pcjohn

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I'm having a random problem with a Gorgar CPU. Occasionally the
CPU runs in "slow motion". The game won't boot. Pressing the test
button and the 2 LEDs will blink twice but after a long delay and the blink
very slowly. Using the test rom I get the same results. Everything tests OK
but the test blinks run slowly. Leave the game off for a few hours, turn it on
and it works fine. Replace power connector, interboard connector and
all caps. Power supply has been rebuilt.

Anyone ever see this problem ?

JD
 
I have seen that before, but cannot for the life of me recall what the solution was. And it was the same thing, where it only occasionally did it.

I want to say it was power related, but that may just be what I was investigating at the time. I would suggest checking the voltage at the CPU chip though, pins 35 and 8 are the power inputs. Make sure to check when it's actually happening, as well as when the game is fine.

-Hans
 
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