4 weeks after the issue of being dead (whatever that is) you report it????
Why does your dealer not support it? Oh wait.... you got it from a unauthorised source right.
Have you tried it in another outlet at home? Have you left it unplugged overnight then tried to turn it on 24hrs later.
Do you have the back switch accidently turned off?
Do you have power going through it and it turns on?
Maybe if you explain what "dead" is I nor anyone else would not be guessing at what kind of help you need.