My Mendel90 won't power-up! (5 replies)

Hi,

This is the first time I am trying to start my Mendel90 after assembling the kit. I have plugged in the power cable and pressed the power on button (Initialize), but nothing happens. The PSU fan doesn't start and the printer is just completely dead. I have tried disconnecting and connecting again the PSU black and PSU yellow wire, but to no effect unfortunately.

I am clueless as to what is wrong and how I could fix this, hopefully someone here would be able to recognize what the error might be. Thanks in advance for helping me.

I have attached an image of my wiring to the Melzi.