If defective on arrival, the customer will receive a entire refund immediately and no return from the miner is needed.?? ??? ??????? ????? ??? ? ?????????? ?????? ????? ???? ??????? ?????? ??????? ?? ????? ?? ????? ?????? ???? ????? ???? ??? ???.The guarantee only relates to the original purchaser who bought the machine straight from NiceAsicMiner.