In my few hours in Tampa this week, I couldn't go through a full regiment of troubleshooting... but... It kept saying "Please check the SD card." Unplug/replug didn't help. Wifi light will not turn off. Forward facing light is configured to be off but is now on. Wifi only connects a portion of the time but playback no longer works. Made attempts to format the SD card on-device, but it seems this may have failed. When I get back to Florida this weekend, I'll pull the card and format on a computer... and also look into re-imaging the firmware.