“If you can’t convince them, confuse them” also kinda works here…

My digital tv reciever cannot receive a large range of channels when a mini pc, in off state, is plugged in on the same switch. It works fine when the UTP cable is not connected, it works fine when the mini pc is on, also fine when the pc had no power at all. Distance between pc and receiver does not matter, neither does the configuration of cables in the switch. I’ve given up on it, but sometimes the issue disappears for months, and then comes back for a while.