Update - Problem solved, it was the power supply.

For anyone that encounters a similar problem in the future I will post more details.

I reached out to Marc Koval at The Repair Shop, and with his guidance I was able to resolve the problem.

1) I was testing the power supply voltages without any load attached. When I measured again with the CO00 installed, the +5v DC dropped to under 4 volts.

2) I thought I had a linear power supply as my original invoice stated 'upgraded power supply'. I learned that that my unit was upgraded to the switching power supply, not the linear power supply.

3) To resolve the problem I purchased and installed the new Meridian linear power supply kit.

Anthem AVM70, 271, DSP7200x2, DSP7200.2HC, DSP5200x4, JL Audio F113,
Oppo UDP203, Panasonic UB9000, Kaleidescape Strato E, Apple TV 4K,
HDFury Vertex2, Epson LS10500, Stewart Filmscreen 110"