Got a dilemma here guys. I've got a Dell XPS M1210. Not sure when this started, but when I plug in the charger, the screen turns completely off. Doesn't dim, but goes blank. However the laptop is still on. It will do this at any given time. If the charger is plugged in and I turn it on, screen won't come on. I've tried hooking it to a external monitor to see if it'd do the same thing and it did, killed the picture on the external as well. Have tried different chargers. What could be the issue here?