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1. Maybe remote control battery is dead, replace the remote control battery.
2. To plug the USB receiver again, or change another USB port access.
3. Restart the TV.
4. Make a factory reset to see if it is restored.
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Please tell us why it is not useful/satisfied:
My problem was not resolved, need service
Product quality or performance
My question is not listed
There is no answer that I needed
The language and sentences are poor
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5 ( Very satisfied)
4 ( Satisfied)
3 ( Neutral)
2 ( Dissatisfied)
1 ( Very Dissatisfied )
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