Boot failure

Differing behaviors included:

1)  Shortly after power application, sometimes CDI needles/indicators would deflect as expected; sometimes not all needles/indicators deflected; sometimes CDI did not move

2)  Sometimes the Avidyne splash screen appeared normally.  Sometimes, it was corrupted (once, "Avidyne" was split/skewed, like the horizontal hold on an old TV was misadjusted--the bottom part of the logo appeared above the top part of the logo; another time, the bottom half of the display had a white "snow" pattern)

3)  Sometimes, the boot seemed to halt and the screen appeared frozen.  Sometimes, the boot seemed to be looping and the screen would flash.  (Video here:  https://www.youtube.com/watch?v=CLvf76_fXNs)

I was able to boot into Maintenance Mode by inserting a USB thumbdrive.  Thinking this might have fixed it, I tried to reboot the box using the touchscreen buttons.  The box powered down briefly, as expected, but when it came back on it still said "Switching..." and otherwise looked like I was still in Maintenance Mode, but was unresponsive.  (I tried this twice with the same behavior both times.)

Of about 4 or 5 attempts to boot into Maintenance Mode, I was only successful the first time I tried and the last time I tried.  When I was able to get into MM the second time, I downloaded the logs, tried again (unsuccessfully) to reboot into flight mode, then shut down all power and gave up on flying for the day.

The box seemed to work fine a week ago (last time I flew).  Plane's been sitting in the hangar since then.  Only potentially anomalous behavior I noticed was some flashing pixels in the upper-left corner of the screen.  I don't remember the behavior exactly, but it was only one row of pixels, and maybe a half-inch long at most.  I noticed similar behavior when the screen was "looping"; I actually zoomed in a bit on that region of the screen in the video linked above.

Guess I'll be on the phone to tech support Monday morning...