Vizio V705X-H3 Main Board (1P-0203C00-4012, 392) Y8389392A. Part Type : Main Board. Board Number : 1P-0203C00-4012, 392. TV Model 1 : V705X-H3. Important Notes : 392 is found on a sticker on the front of the board.. Genuine Vizio Main Board Y8389392A. Check out my other items.