Nook won't power on

My sister has a Nook she owned for over a year. We had one problem before that where it suddenly wouldn't do anything. We fixed that with a call to tech support. She gave it to me again because, now, it won't even turn on. A number of places online said to push home + power for 20 seconds and it would turn on. It didn't. I tried a combination of the volume buttons (or what I am assuming are the volume buttons) + the power button and that didn't work. I even tried pulling the battery and pushing the power button thinking that would clear something and that didn't help. The only thing I noticed was that, when I plugged it in, the green light was lit, and I held the home + power buttons, the green light went off after 5 or 6 seconds. She doesn't really care all that much about it except for whatever personal information she has left on it.