Vizio M70-C3 Main Board. TV Model: Vizio M70-C3. Type: Main Board / Motherboard. Condition: OEM – Pulled from Working TV. What This Board Controls. Tuner & Smart TV Functions. WiFi / Streaming Control. Match BOTH numbers before ordering. 1x Vizio M70-C3 Main Board. Please message us first if you experience any issue – we’re here to help.