KAD miner Goldshell KD6 control board replacement The official original Goldshell KD6 control board is used to repair and replace the faulty old KD6 control board, and restore the data transmission between the control board and hash board. ZEUS MINING has cooperated with control panel manufacturers for many years, with rich experience and first-class technology. All control boards are rigorously tested before shipment to ensure proper operation.