That is the mpu you are touching. When you flip the switch, does it make any noise like the fan in the power supply inside the mpu spins, or some leds light up on the mpu? Also this machine has 2 power switches on the left hand side, one is the cabinet power and the other one is the cpu power. Make sure both are on. If the mpu seems to not be getting any power, you might want to check the fuses on the left hand side of the cabinet where the power switches are. You can also pull the mpu out (after you unplug everything) and test the mpu outside the cabinet with a standard vga monitor and a pc plug, to see if it powers up and you get a bios message screen.