On offer is Vizio mainboard Y8387672S. For Vizio tv model(s). This is a replacement board for tvs experiencing malfunctioning symptoms such as. Black and White only. Stuck on logo screen. Nick’s Electronics Repair is a brick and mortar TV repair shop operating out of Tucson. We service, refurbish and resurrect electronic components such as these that. All New, Used, and Refurbished boards.