Photo Booth camera light

Approximately one in ten times that I turn on my new MacBook, the green camera light is on. If I open Photo Booth the camera screen is green. I then turn off the computer and re-start. Sometimes that solves the problem. Sometimes the light is still on. I then unplug the power cord, remove the battery, then replace the battery. After I restart, the light is off, and Photo Booth works.
For $2000, this ought not to happen.