My laptop's battery was dead, so I plugged it into the charger. My computer refused to turn on, even after charging. I completely turned it off, took out the charger, and removed the battery and put it back in again. Now, when I take out the charger or put it back in, I get one single loud beep. The computer still wont turn, and I don't know what the problem is. I have a Lenovo G505 laptop. Thanks.