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!
I have the original Philips system and the sound just went on it. I have some guys at work who helped me replace C987 & C988 w identical 470ufd 35V caps. I even replaced the fan, as we could only get the fan to "pulse" and not fully turn on. I plugged the repaired unit back in and still no sound.
I'm interested in any other remedies you may have, including jumping pins 1 & 5 w the 10k resistor. I just need a little more info about this, maybe a pic, etc.
Any help you can offer would be appreciated - in the last month we have been slammed with unforeseen car and house repairs and anything I can do to salvage this system would be great.
I have the original Philips system and the sound just went on it. I have some guys at work who helped me replace C987 & C988 w identical 470ufd 35V caps. I even replaced the fan, as we could only get the fan to "pulse" and not fully turn on. I plugged the repaired unit back in and still no sound.
I'm interested in any other remedies you may have, including jumping pins 1 & 5 w the 10k resistor. I just need a little more info about this, maybe a pic, etc.
Any help you can offer would be appreciated - in the last month we have been slammed with unforeseen car and house repairs and anything I can do to salvage this system would be great.