You're right, you did say parallel []. My fault.
I don't think we are misreading the R27 resistor. Here is a picture of it:
It looks like the bands are Black, Blue, Orange, Gold which would indicate 6K ohms. It is totally open, which is strange considering it looks to be in decent condition.
Thanks you in advance for the schematic! I think we are going to focus on testing the 3 voltage regulators (U2, U3, and U4) on the speaker terminal board next.