I just got a new BeagleBone Black and have flashed Debian 7.9 successfully. I was connected with USB to a Mac running OSX 10.10.5 Yosemite. I was using a 5v 2A power adapter and a TP-Link TL-WN722N wifi adapter. I used both with another BBB for about a year with no problems. I was in the process of adding the Adafruit wifi-reset script to the startup services when the BeagleBone died. Nothing else was connected.
Now whenever I try to boot the system, there is a single momentary flash of of the power light and thats it.
Is this likely just bad luck on my part? Is anyone else having this problem?