Hi Brayn,

there is something with your SD card. Disconnect the battery is always a good idea.
If you have the old version of Centaur, the LEDs will switch off and there is nothing on the display.
If you have a newer Version, you get a beep and later a menu.
Today I'm working to fix a bug with pawn promotion with UCI engines.
I uploaded a new image yesterday, I will always test it again, but there are arround 50 installations that runs from the scretch.

Dirk