terminator 2 judgment day 1991

dviper

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I'm having a problem with the upper set of lights on the display, the lights all work when I swap out the lower lights to the upper lights on J120. when I take a reading on pin 9 of J120 for the uppper lights I get 7.30 volts but pin 1 I only read 0.03 volts. The book reads that the wire for the upper should be on pin 7 and 1 but I only read .05 to .06 volts on pin 7 and pin 1 reads 0.03 volts. I read 7.68 volts on pin 8 for the lower lights and 1.32 volts on pin 2. When I got the game from my brother the brown wire was on pin 1 and the white with brown trace was on pin 8. The following voltages I took from each pin as follows.

pin #1-0.03 volts
pin #2-1.32 volts
pin #3-0.17 volts
pin #4-key
pin #5-0.18 to 0.24 volts this reading jumps around between these two numbers.
pin #6-1.35 volts
pin #7-0.05 to 0.06 volts this reading jumps back and forth between the two numbers.
pin #8-7.68 volts
pin #9-7.30 volts
pin #10-0.25 to 0.33 volts this reading jumps around between these two numbers.
pin #11-7.31 volts

It seems that pin 1 isnt getting the right voltage or ground. Is the next check from pins J115 to pins on J120 to make sure board isnt bad or fuses and triacs?

HELP!!!!!

Dennis
 
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