Okay, got it working now.

What i did was take it apart, removed the battery and measured the voltage, 3,89v so the batterty was at full charge.

Then i removed all the cable connectors from the mobo and reinserted them, put all back together and finally inserted the battery connector to mobo, then led flashed

Finally the screen and final screws, booted up like nothing. So removal the battery was probably all needed.

What i noticed after inserting the battery it started generate a lot of heat to the upper section of the phone, but does not anymore. Wonder what caused that?

But it works now so better not to mess with it anymore. And newer leave you n9 to car overnight especially when the winter is coming