Step1： Check if you set the time in the clock menu on time.
Reason： TV will be switched on when the set on time reach.
Solution： Cancel the on time that you set.
Step2： Check if you set the time in the clock menu-off time.
Reason：TV will enter standby mode when the set off time reach.
Solution: Cancel the off time that you set.
Note：Within 15 minutes there is no signal, the TV will auto sleep