So I am watching TV and the electricity goes out. After about 90 minutes, the power comes back on.
But, the NDX2 screen shows a strange picture and will not boot up:
You could try a hard factory reset if it plays up again. I have found my NDX 2 is a little temperamental on a boot-up ever since the latest firmware update was installed. This was never an issue before. However, once sorted, all is well again.