Can't change brightness on external 27" cinema display
Hi,
I can't change the brightness of my 27" cinema display. I have no brightness fader on the settings. I have tried it with my MacBook Pro (Sow Leopard) and my MacBook Air (Lion). On both devices the same problem.
The display is too dark and I would like to brighten it up.
I have searched the forum and tried several things without luck.
The USB cable is plugged in.
Any help is highly appreciated.
Thanks,
OBE2011
Cinema Tools, Mac OS X (10.7.2)