Upon booting, the ?splash screen? is displayed for about 2 sec. Then, the screen goes blank (not black) for about 5 sec. As long as there?s power, the pattern repeats. The most likely reason is what is described here: <https://www.pda-soft.de/en/stories/1771/max1771.html> Good luck! Frank -- Newton software and hardware at http://www.pda-soft.de