I made a video to show exactly how can I power-up my "dead" MoBo : Y0u†ube video : Motherboard won't start with power button - only with Green and Black cable ATX trick ...

For instance, if you are not receiving power to your PC, it could be worth trying to jump-start or hotwire it to bypass the case power button to help rule that out.

I have replaced the motherboard, the CPU, the dc-dc board, the LDVS boards, and a few other components except the LCD inverter board, the power button board, etc. Any clues out there? I´m stumped.