A:Answeris it plugged in and if so you may have to flip the switch on by the plug in on the power supply. Another thing is to check the connections inside the case after the 1st 2 options are checked.
A:AnswerNoctua NH-D15S or H100i liquid Cooler. I've read that those would work for this. I use the noctua and it keeps it in under 76 degrees celcius and easier to install.
A:AnswerThe stock cooler that comes with this computer is a little weak. I suggest upgrading it to either a better air cooler or a closed loop water cooler.
A:AnswerIt is not plugged into the cpu header on the motherboard because of the rgb setup. You can go into dragon center application and make the fans run at any speed.