I was troubleshooting some LED lighting issues with Barb. I had just replaced some incandescent with LEDs that the last owner did not get around to. When I powered it up a electronic burn smell was present. I initially thought it was the quad opto board because some of the lights would not work and I traced them back to a ground in the quad opto board. My opto board would not work correctly with only 3 leds lit and 2 drops hole that would not register. There is an 8 pin and 10 pin mollex connector on the board. I unplugged the 10 pin and all 4 leds lit. I was going to replace it but I went searching for the smell. It was in the back box on the MA-1629 sound board lower input connectors. Both have burn marks and does not look damaged besides the burns but it could have scrambled its memory. Would anyone have any good ideas before I start replacing misc boards????? Thanks from Larry in New Mexico.