My computer wil not boot up while my case fans are hooked up when they are not hooked up my computer will turn on. I have a corseair cx600m, r9 270, n the case is a phantom 410, gigabite motherboard, 8gb of corseair vengeance ram.
start with the obvious like making sure the monitor is plugged into the right spot and on! double check all your connections...sometimes you just have to unplug everything and start over