why does my promethean activpanel light shut off after a second of me plugging it in?
I plug in my Promethean activpanel av70 to a power source. A second or two after it plugs in, the light turns on and off right away. It does not allow me to press the power button to turn it on. Last friday, I was able to make it turn on after many attempts, but it turned off after about ten minutes and I have been having the same issue. What can I do to solve this issue?