This part came from a working crack screen TV. Part Type: Main Unit, Main Board, HDMI Input, A/V Board, Signal Board, Tuner Board, USB Input, Digital Audio Output, Ethernet Input. MFR Part Number 1: Vizio 756TXFCB0QK0240. MFR Part Number 2: Vizio 756TXFCB0QK024. Board Number(s): 715G7689-M0C-000-005Y, (X)XFCB0QK024010X, GXFCB0QK024010X. Important Message: IMPORTANT: Compatible with Vizio model D55u-D1 TVs with serial number beginning with LTM7UCAR. PLEASE NOTE: The board you receive may or may not have connectors at locations CN210, CN212 and CN203. These connectors are not used in model D55u-D1 and will not affect functionality. This part has a broken tuner connection. TV Part Types: Main Board.