Is my charging circuit broken? My hp pavillion would only power on without a battery in, plugged into the charger. so I assumed I needed a new battery. After trying a genuine battery it still wouldn't power on on its own, the battery was 80% charged when I booted it up however when removing the charger it turned off instantly. It also said battery not charging 80% when I hovered over the battery icon. Is it fixable ? I've had to borrow a very old machine to use in the meantime and its driving me insane.