There is the possibility that the charger has a broken connection on the DC plug. Gt a multimeter and plug in the charger. Attach the multimeter to the DC plug and see if you have any output. Move the plug around and see if it either gets power or loses power. It is also possible that the DC adapter on your mother board has either come loose on the board or has broken solder connection. The only way to determine that is by opening it up and using a multimeter to see if you are getting power with the AC Adapter plugged in. Hope this will get you started and let us know what you find out. Good Luck.