OK, so you had to pull the IC to see signal at the input pins. You need to specify when you do that. That is a fine way to see that the signal path is intact, but if we are led to think that IC is in place and we still see the input, it will lead us astray.
I might try banging some sort of noise signal into the base of Q6 just to see if it makes it to the output.
I might try banging some sort of noise signal into the base of Q6 just to see if it makes it to the output.
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