Un70nu6070fxzc TV turn on/off automatically with red light flashing

[shawn6]

My Un70nu6070fxzc TV cyclically turn on/off automatically with red light flashing. Nothing happened after replaced mainboard that is from TV Parts. But it can display with failed color from black&white to color when disconnecting VGH on one side of screen. And same thing happens to the other side. it turns on/off automatically without display when connecting VGHs on both side. What is issue and how to do please? Thanks a lot!

[Georgine]

Hi, Welcome to the Samsung Members Community Canada. Please try the below steps and get back to us with the results.

1) Unplug the TV for 30 seconds.

• Unplug the TV from the wall outlet or surge protector for 30 seconds, and then plug it back in.

2) Try to update the software.

• In some cases, a software update can correct the problem. There is a risk, however.
• If the TV turns off during the software update, it could damage the TV.
• Updates can take up to 30 minutes depending on network speed, so if the TV is not turning off too frequently, try updating the software.

3) Disable the Power On with Mobile option.

• TVs that can connect to SmartThings can be turned on using compatible devices, sometimes automatically.
• However, if abnormal "power on" signals are sent through the wireless network, they will trigger this function and make the TV turn on.
• If you do not want this function, navigate to Settings > General > Network > Expert Settings > Power On with Mobile, and turn the setting off.
• If the TV continues to turn off and on by itself continuously, visit the Support Center to request service.