My brightness as suddenly dipped to very low on my 30 inch display. I have located the brightness control on the side of the display, bur is is not responfing when I press it. The brightness symbol did show up on the display showing the lowest setting but this has gone and will not come on at all now. Any suggestions?
Thanks
Mac Pro, Mac OS X (10.6.8)
Make sure the display brightness controls are set properly. Use the brightness buttons on the side of the display or choose Apple > System Preferences, and click Displays.
If a portion of the screen remains dim after the display has warmed up and the white
LED on the front of the display is flashing a repeating pattern, contact an Apple Authorized Reseller or Service Provider.
This is from the manual on the Apple Support Site.
low brightness on 30 inch display
