Just built a pc today with all new parts. Installed a AIO water cooler and first it was turning on and off for few times then it stayed on but I noticed water pump was not working. First thought that water pump was a defect but when I tried few other ways I found that when I pull CPU cable out it works fine. Which means pump works and pc doesn't turn off but of course computer won't boot. I tried few more times with cpu cable in and computer boots up and stays on now without turning off but pump doesn't work. What is wrong? Again all parts are new and my PSU is 750 gold class so it should provide enough power even though I have 1080 VGA. Anyone knows what's going on here?