Check the fuse resistor on the power supply output area.use volt meter check 12v for amplifier and all regulators if the if they are outputing property the voltages as 5v or 12 and make sure no dag something like a loose which caused due heating.check zenna diodes over board makesure no contunit alam for it.This is my thoughts according to explnc and if it turning green light and stil the same the pr0blem shold be microchip(processor) or crt cap