It's hard to determine whether or not this is a hardware issue. Does the computer seem like it's running when the black screen appears? Have you attempted to boot into safe mode by repeatedly tapping f8 when booting? If you can start this way, I suggest doing so, then going into device manager and updating your video driver then right click and uninstall. Then look for the specific video driver for your model from Acer's website. Another thing to check, is if you have more than one ram stick installed, to remove one or test it in either slot or test the other in either slot.