Motorola VT-71 K Chassis Restoration Issue

[Chris K]

Hi gang...yes Old TV Destructo here! Actually, I'm in a good place with this one. I was conservative and took my time with the HV capacitor replacement and I have a nice bright picture on a fairly new RCA replacement CRT. A raster is present. All of the wax caps have been replaced. I have replaced several out of spec resistors but honestly, I haven't tested all of them. I plugged in my pattern generator (it is working...tried it on another TV) and there's no signal getting through. The tuner is clean as are all of the control pots. All the tubes have tested good. There's a slight buzz/whistle on the speaker that disappears when I go from channel 4 on the TV to another channel even though my generator does not produce an audio signal. This makes me think something might be getting through or at least that my channel setup and the coaxial connection is OK.

I want to be very conservative and not mess this up like I did my RCA 721 when I started moving coil slugs and the like without understanding what I was doing. What would be the most basic steps to begin to troubleshoot this issue?

Thanks all,
Chris