It may be a symptom caused by a defect in the display.
Try this
A temporary error may occur due to electrical supply instability or other electrical factors.
➔ Pull out the power cord and connect the power again after five minutes.
If you cannot see the power cord, flip off the circuit breaker and then turn it back on after 10 seconds.
If the same symptom persists, it should be checked by a service technician.
This guide was created for all models, so the images or content may be different from your product.