This is obviously a m/b problem. I don't see anything loose (a/c plug on mb), or burnt. Any idea of what m/b component that would cause this? The machine runs fine on a charged battery, but now my battery is dead. I removed all devices, i.e. hd, optical dr, memory and problem persists. Pls help!
Does your laptop already been dropped? This problem may be due to a short circuit inside the motherboard. May be a capacitor or a resistor is defective or the + and - wire are in contact at the output of transformer.
I suggest you go see a qualified technician who'll enlighten you.