[AuXBoX]

Try making a bootable SDCard with this
Format SDCard
Use this u-boot_MX.bin file for the tool.

After the tool is finished, extract all of this zip file to the SDCard.

Unplug the power cord from your device
Plug in the SDCard
Hold the reset
Plug the power cord back in
Release the reset button after 15 seconds

WAIT for at least 2 minutes, DO NOT TURN IT OFF.
Hopefully that works. If not you'll have to open the box and short some pins

I'm desperately trying to revert my ATV1200 back to Android, coming from your Gotham 13.2 build after upgrading to EmbER - but whichever method I try (the one described above, the reversal package provided by EmbER, the HowToRevertToBox4.1.zip from the 1st page of this thread or any other I know of), I always get stuck:

• Power on the box while pressing the upgrade button, waiting 10-15 seconds
  
• Linux/Tux upgrade screen appears (not the Android one)
  
• Loading bar is slowly progressing, suddenly jumps to the end
  
• System boot menu appears, always showing this error:
  Code:

  assert failed: getprop("ro.product.device")=="stvmx" | | getprop("ro.build.product")== "stvmx"

Apart from that, my box seems to work fine - however, I wanted to perform a new & clean installation of XDA Developers Gotham Build 13.2, because since the upgrade to EmbER / Kodi 14.2 and the "downgrade" to XDA Gotham 13.2 my mp4 movies do not play smoothly any more (video hangs every 2-3 seconds, already tried to change that by playing around with the audio/video sync settings with no success) ... with EmbER Kodi 14.2, video playback is fine. However, I think I want to stick to Gotham for a while ...

... so does anybody know what prevents me to revert back to Android?

Many thanks in advance!

Can you get into recovery?