Thanks for your reply Greybeard, it's appreciated. I received another replacement K95 on Friday, and it too has a faulty LED. However I've just been contacted and offered an RGB version as a replacement which is great. Thanks very much for your assistance in this, it's appreciated - I'll let you know when the RGB version arrives!
Try using the top 2 USB port on your board and see if that makes a difference. Also, make sure that you have all USB drivers up to date.
If those doesn't change anything, contact our support guys and ask them to provide you hardware reset on your KB. Keep me posted.
Does the K95 RGB suffer from the same issues LED wise as the K95? Interested in picking one up thats on offer, but I hear the LED burned out fast on the K95.