PC Won't turn on

[jakeeparkes]

Hi, my PC won't turn on at all, my PSU works in other computers, the power button works, I've taken everything out but the essentials yet still nothing.
I have tried a different PSU too.
When I press the power button, absolutely nothing happens, no lights anywhere.

 

[jakeeparkes]

Thinking about buying a motherboard, however dont know if this will be the fix?