FOR X1 Carbon USB Audio & mini DP Board 04W3912 55.RQQ03.021G

Replacement USB Audio and mini DisplayPort (mini DP) daughter board for X1 Carbon laptops. This unit corresponds to part numbers 04W3912 and 55.RQQ03.021G and provides the USB audio and mini DP connectivity for compatible X1 Carbon models. Ideal for repairing or replacing a damaged board; designed to match original specifications for a direct swap.