Mega Adk not recognized

Yo my ppl,

i bought an arduino mega adk r3 from a guy but windows 10 or 7 can t recognize it. not even the beeping sound of the usb it makes... i think its not burned led an ON they light up,press reset button led blinks twice(heartbeat function i think)... i did update my bios,tried other version of the ide,other drivers and stuff from other ppl issues similar to mine and theres a no go...if anyone can help me ill appreciate.

tranky