MAIN BOARD, CIRCUIT BOARD P100, P/N 56626A1, REV. Please refer to the photos. Thank you for choosing us : We are constantly renewing ourselves to offer you better products. This is a VIZIO main board, also known as circuit board P100, with part number 56626A1 and revision A. It is compatible with VIZIO model E70-F3 and has a serial number of 04080314833.