Philips thought it would be a great idea to use a VGA connector for 5.1 audio. All of the internet said nothing. Found out pin 1 was the on signal(no switch on the back, it was originally powered on by a signal from a DVD player). Jumping the pin to ground brought the fan on for a second. I had found a "safety" feature. Had to tear open the power supply/amp to find the IC responsible for switching this sucker on. Found a DM311. It will switch on the power if it gets a voltage between 0.5V and 2.5V, 4.5V or more will trigger OL and shut the unit down. Sounds like I found my guy. Jumped a 10K resistor in there and wham bam thank you ma'am I get sound!