Hello I have a fairly new pc and I was just playing yesterday and I was install 8gb more of ram and layed my pc on its back snd strated my pc up and the pc turened on but the keyboard and mouse and monitor didnt. Nothing was displaying on my monitor and i unplugged the keyboard and mouse and the hdmi and still didnt work I also even tried didfrent cords and the weird thing is that when i plug in my phone carger it charges. My gaphic card fan is running and so evey other fan anrd the leds are working.