100% Tested & Guaranteed to Work! ? Vizio Y8389522A Main Board Compatible Model: Vizio V705-J03 (70 Class 4K TV). Key Features & Benefits. ONLY compatible with Vizio V705-J03 TVs or if your original main board has part number Y8389522A. This board works ONLY if. Your TV is a Vizio V705-J03 (check the back sticker for the model number), OR. Your original main board’s part number matches Y8389522A. We’ll verify for FREE! A photo of your TV’s model sticker. A clear picture of your old board’s part number. ? What’s Included. 1x Vizio Y8389522A Main Board (tested & cleaned). V705-J03 (70 4K TV). #VizioRepair #Y8389522A #MainBoard #V705J03 #4KTVRepair #TestedAndWorking.