Part Info: Brand: Vizio Part Type: Main Board Part Number: 515C55861M08 Board Number: MT55861-ZC01-01 Compatible Models: V4K50M-0810 Important Notes: Please ensure the part number, and model number match. Otherwise this board will not work for you. The part number MUST match the part number from the board you are replacing, or this will NOT work for your TV even if the model listed is correct. The TVs we get our parts from are coming from Major Retailers.