either extend the soft power push button to the front of the car...... or check the bios for a "auto power on" setting.... or what I did... I had the BIOS option under "power settings" to set what to do when power is restored after a power failure. I set this to "turn on".... when I apply power to the PSU thru the inverter to power it the computer automatically powers up, since it is considered a "restore" to power. did I make any sense at all then?! hope that helps anyway..