power it up with the power supply and it should blow your eyes
another thing is you can edit brightness settings under setup button.
If this doesnt help you might check for the failure in the power supply.
Cheers
So I hooked up a Minitaur to Ableton via external instrument which is controlled with my Microkorg via midi. The strange thing is that when I turn off ARM button I still can hear the Minitaur when I play, it is annoying since I would like to use some Microkorg sounds as well and when I play ...