I was given a Toshiba satellite pro 650-Ez1. I have been charging the battery and when I turn on the laptop it shows that it's on except for the screen is totally black. After trying to function buttons the laptop will shut off by itself. At one point it started to give institutions to do a task , however there was nothing but a blank and black screen. Please tell me what could be the problem and if it's worth getting it repaired. Thank you any help or advise goven.