Question: how to sync cable remote to vizio tv?
Answer: Manually turn on your TV (or device you want to control)
Press the TV (or device) button and hold for 5 seconds until the LED flashes twice. ... 
Find the programming code for your TV (or device) in the code list and enter it using the Number Buttons. ... 
Point the VIZIO remote control at the device and press the POWER button.