[pip08456]

Certainly, as mentioned above there were many VMNG300s that refused to lock onto the primary downstream channel above 7dB therefore -no service.

Plus there is this.- High power levels can cause QAMs around the tuned one to break through the tuner's isolation and interfere with the intended signal.

I don't think it's necessary to get any deeper into it. Suffice to say until the power level is rectified further investigation is pointless.