What are the secret button presses to activate special behaviors on the Neuros?

- PLAY + UP: Reset without power cycle. NOTE: After using this keypress to shut
  down the Neuros, it won't power up again when you plug in the power cord. You
  must first power it up and shut it off normally. It will then resume powering on
  when plugged in.

- HiSi + UP: Reset with power cycle

- 1 + 5 + PLAY: Powers up with the option to reformat the HD or flash 
  (unplug power first)

- PLAY + DOWN: Firmware reload menu from program flash (unplug power first)

- HiSi + DOWN: Firmware reload menu from NAND flash (unplug power first)

- DOWN + toggle Lock: Voltage display in place of the battery icon

- UP + toggle Lock: Sleep timer: countdown for auto-off, initially set using the
  auto-off time from the saved preferences. After the sleep timer has been
  activated, pressing UP or DOWN in the main menu will adjust it by one minute in
  either direction.