I recently opened my HP Pavilion G7 laptop in hopes of cleaning the cooling fan. I removed the hard drive, RAM, wireless internet card, and battery. I then could not remove the keyboard so I stopped and put everything back together. Ever since I did that the laptop won't turn on at all. I don't get an error message. The light on the power button does not even light up. Based on a post I saw here, I tried removing the hard drive, RAM, and battery again, and plugged the laptop into the wall. Still nothing. It seems like either I have a major problem or something related to the power button is not functioning. Can anyone suggest anything I can do?