Does it take the same with both the control and the keyboard? if you turn it off and immediately want to turn it on repeat the fault or turn on quickly? comment ... greetings.
Yes, it is the same with the control as with the keypad and also if it turns on instantly
ok reynaldo it is obvious that your tv has a problem, usually caused by the source, it could be a filter that is loaded and the tv does not start until it is downloaded, so you have to make a modification to the circuit to accelerate the download through a resistor Sangria, comment if you are a technician or if you have knowledge of electronics, otherwise you have to bring the TV to service.