Does the computer's power management
software tell you that the power supply is unknown or does the adapter simply not provide power?
Will the computer run on the AC without
charging the
battery or is neither happening. I ask because as it happens, Dell is sending a warranty tech to the
boat tomorrow to replace my motherboard. I was periodically getting an error message saying that the 120v adapter was unknown and the
battery would not charge. Didn't matter what I plugged it into. The Dell support people diagnosed a motherboard fault over the
phone and overnighted a replacement to a local tech. (Not bad considering that I bought it in
Canada over a year ago and I'm in SoCal now!)