First off, this is a great product. I love the overall build of the keyboard. Okay, now for my problem. Keyboard was fine for a month or so, until lately, some keys are not lighted up even with the mode where all lights are turned on. Namely.. F3, F4, Q, W, Prt Sc, Scr Lk, Page up, Y, 8, C, V, left Alt, down arrow and a few others. Could this be a macro/customization function or something where what I did was manually turned off some switches? If so, how do I reset it. Alternatively, how do I troubleshoot this. Please help, thanks. Keyboard is only two months old, it worked fine weeks before.