Here is my dilemma: my computer intermittently will not start. I will push the power button, the lights come on on the base of the laptop, but the screen does not come on. I have attached an external LCD (via VGA cable) and it does not come on either (when it decides to malfunction). The fan will run, but I have no display whatsoever. Other times, it starts and runs marvelously! When it runs right, it is a really great computer for what I want to use it for. Unfortunately it doesn't always work! Okay, my question... What could be wrong with it? My attempts at a solution: The aforementioned external screen for diagnosis... I have done a "hard reset" with seeming success, but only temporary success. I have replaced the hard drive (cloned and replaced with a similar drive). I was going to search for updates... but it wouldn't turn on. I will try that eventually... if it decides to be nice and turn on. So... what did I miss? What else could it be? Will upgrading this to Windows 10 help? Thanks!