I'm working on a pioneer 780, and I can't get the FM stereo light to come on. I can get stations in stereo. The "source" light comes on but it is dimmer than it should be. The source and tape monitor lights get about 2V across them, and the FM stereo light gets about 1.2V. But the voltage going to it look correct according to the schematic. 7.4V on one side of it and 6.5V on pin 6 of the tuner IC that drives it. When I test the LEDs with my meter, I get a double diode drop worth of voltage across each one. What could be going on here? EDIT: I'm getting the 6.3V at the chip whether it is in stereo or not. So the chip isn't turning the light on?