This board was removed from a working TV with a defective display panel. It has been tested and verified to be in fully functional condition. This main board will only replace ones out of a Vizio M# E75-E3 with a serial number that contains, LFTIGRAT. The manufacturers part number, Y8387674S, is not printed on the circuit board. A partial part number is printed on the white sticker for identification, 674. The following board numbers should match the board numbers on the board you are replacing, 0180CAS08E00 and 1P-0169X00-4013.