I purchased a couple of fans a couple of months ago and installed it. Everything was working fine, fan and RGB lighting. Last week I noticed one of the fan's RBG was not working, but the fan was working just fine. I checked the RBG connection by attaching another RBG fan to the connection and it worked just fine, so I know that the problem is not with the cable or the motherboard connection. How do I go about RMA's this defective fan and getting a replacement?