hello i just put together a new build for my wife. i did a test build out of the case and when powered on i got a mobo screen on monitor. so i went on to build the computer inside the case. after i got everything done and plugged in, i turned on pc and everything turns on other than i am getting a black screen now. so i started to unplug one by one to see if i could find the issue. i unplugged everything and had to take out of the case. but now even outside of the case i still get a blank screen i dont know what else to do