Recently my hp pavilion dv7 laptop's battery died, so I've been running it with just the charger. It worked for awhile but when I unplugged it from the charger and tried to connect it again, after a few days of keeping it connected, it wouldn't send a charge. I concluded that because there is a small light that turns on when the charger is connected. I took it to a local computer repair guy and he said that its probably a motherboard problem after doing trial and error. When I took it home I just left it on my desk and for no reason just connected the charger. The next day the light was on and the computer worked. I later unplugged it and plugged it back...and yet again it wouldn't worked. But then it worked again after leaving it for about a day on the charger. I am waiting for a battery replacement, but I would like to know if anyone knows the reason to this behavior and possibly if this is serious.