I remember pressing the power button on my constructed PC for the primary time… and it didn’t activate. Turns out the main powersupply plug wasn’t plugged into the motherboard all the method in which. Now that everything’s in place, it’s time to hook the cables to the motherboard ports. You most likely have a common idea which cables go to which ports by now when you adopted the very first step. So do that should you haven’t already or proceed and examine which holes the cables must be routed to. Get your energy supply and check which cables you’ll be using for later (if you’re using a semi-modular or totally modular PSU).