I have a broken JL JX500/1D with a busted power supply. I have only taken time to identify the issue, I assume this is the driver IC for the FETS, they don't cross to any thing either. I can't cross this device M18021HN. There is a missing section of the IC that starts MPS. There a 4 power supply transistors, two are burned. Any Ideas? I have added attachment with picture.