K50 issue

Hi,



I bought an keyboard Corsair K50 2 weeks ago, when i installed it, i has problems with drivers, but i fixed it with the tutorials in this forum.



But today, when i turn on the computer, the keyboard dont start, it keep with the lights off, i try to change the USB ports, change the PC, but the keyboard keep off, dont start and dont works correctly.



plz help, sorry about my english, it's too bad...