At any random time the computer freezes and generally the screen kind of fades to completely white or has lines, but always fades away and freezes. This usually happens a few minutes after starting the computer if the AC adapter is plugged in, and can usually last a whole battery life if it runs on battery. It does this at random times when not touching the computer, but it will always do it if the computer is jolted or bumped. This is a very annoying problem, what can I do to test what this might be? Could the inverter be going bad?