Fippooo

Thank you for your help. By using the FN combination I was able to get the light back on and it's now working perfectly again. Many thanks!

Thank yo for your reply. Where can I find these combinations?

Hi everyone. I bought a K55 RGB Keyboard no more than two weeks ago and it's working perfectly except for the lighting that has suddenly stopped working AT ALL. I started my computer as usual but noticed the light wouldn't go on but didn't think of it very much at the time, thinking a simple reboot would solve it, and kept on doing my business on the computer. The next time I started it I noticed the lights would still not come on and so I tried changing USB slot but still no luck. Also tried another computer and an USB-dock without any change, is it broken? I currently use the keyboard together with my Macbook Pro (temporary, thank god) with OS X Yosemite 10.10.5, which means I have no software. Would really appreciate some help! Thanks!