Firepower II
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Quoted from sparrowsinfrost:so I have to desoder every resistor in order to test it? the resistor looks like a fine replacement I just question the hacked jumper.
You're chasing the wrong thing IMO. I'd start with the socketed chips in that circuit Barakandl listed above. Do you have a 7400 IC tester?
Quoted from sparrowsinfrost:ok, I don't have an ic tester is there one you can recommend?
I've had a cheap one from China off Ebay for a few years, I don't see the exact type that I have, but something like this should be fine.
You can look around and see if you find one that ships a little faster or is slightly cheaper, they're all about the same.
Assuming IC 7,8, and 9 all test ok the game over signal also goes through PIA IV which is IC 5, the leftmost PIA. That is also socketed so if you have a spare it would be worth swapping out to test.
Quoted from sparrowsinfrost:Can ibtest these ic with a multimeter once they are removed? I don't really want to purchase a tester if I don't have to. IC 7 is a 7408 and from what I can see they basically don't exist any more so hopefully it's not that one, I found a source for the other 2 types (IC 8,9,5)
https://www.pinwiki.com/wiki/index.php?title=General#Testing_an_integrated_circuit
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Kent, WA