Problema notebook no prende

Hola, tengo un gran problema ayer trate de pendrer mi notebook y presione el boton de encendido y nada, no hubo reaccion ni nada, asi que asumi que era un problema que no tenia carga busque el cargador lo conecte y nada aun. desconecte el cargador y la bateria y volvi a conectar el cargado y trate de prenderlo y solamente prendio la luz que indica que esta prendido nada mas, no produce ningun sonido ni nada. nisiquiera del ventilador o un pitido y nose que hacer.
Alguna Idea?
es un Lenovo Thinkpad E440, hace 2 meses me cambiaron el display por garantia, nose si tendra algo que ver.

Hola, los pasos para confirmar si el fallo puede ser mas grave son los siguientes
* Desenchufar el portatil
* Quitar completamente la bateria del equipo
* Pulsar el boton de encendido durante 30 segundos
* Conectar el equipo a la red electrica sin batería
* Encender normalmente el equipo.
No tiene porque tener nada que ver que te hayan cambiado la pantalla.
Un saludo.

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