Patrick,
I believe that the message was 54389 and you had lost audio. Now that you have the 'scope (Congratulations!) you can take a look at the I/O from T7/C222-1 and see if there is anything coming in from the receiver. If not, that would explain why nothing is passing through the new board. If it is present there, see if it's on the source of Q3. If it's there also, go to the drain and look. Let's say that it is missing there: Look at the voltage on the gate. See what a great tool that new 'scope is? You can walk right down the chain in no time.
Let me know what you find. -Don
Don, ND6T