I have an nc2400 that I can't for the life of me figure out what is wrong with it. I have two power adapters one is brand new. I have 2 batteries one is old and the other is brand new. New battery is good and has a charge. With the laptop plugged in, it powers on but Windows 7 says no battery detected, thus won't charge the battery. If I unplug the cord after booting into windows, the laptop still runs but the battery light flashes constantly and windows still thinks its plugged in. If I try and boot with just the battery plugged in, the battery light flashes about 7 times but it never turns on. If I pull the plug after post it boots into windows but again does not recognize the battery and the light flashes. I have tried the whole shutdown, pull battery, hold power button thing. I have tried removing and reinstalling the ACPI battery driver. Tried differnt combination of both batteries and adapters. Nothing has worked. I guess it has to be a hardware issue as just booting on battery doesn't even post. Only thing I can think of is the power jack might be bad. But if the jack was bad I would think it wouldn't let me boot while plugged in. I don't have to wiggle the cable around either for it to recognize the power adapter. Any help greatly appreciated. *edit* I also tried installing the latest HP bios. Which did nothing.