When you say "kills the HDMI output", I assume you're saying that NOTHING will come out of the HDMI output, if so, that is not what is happening. The HDMI signal is output correctly, it just doesn't produce the necessary and usual 5 volts to power a switch. It will run through the switch if...

HR44-700 - Genie HD DVR - not supplying power through HDMI output port. When plugging the output into an HDMI switcher, it's clear the DVR gives off no power through the HDMI port (like most receivers do). However, the C41-500 - Genie Mini - DOES give off power through its HDMI port. Is...