I'm working on a friend's Toshiba Satellite A505. When they first brought it to me, I couldn't get it to power on. The A/C adapter had a little tear in the cord but after a while, I was finally able to get it to power on. It must not have been charging or eventually stopped because it powered off after about 10 minutes. Since then, I have not got it to power on at all. I had them purchase a new A/C adapter, thinking that was the issue but it still doesn't work. Whenever, I plug in the adapter and try it, the battery light on the front just flashes. I've also tried it with the battery removed but I'm not getting anywhere. What else can I check?