OK with a little playing around I found that when I use the function keys to adjust the brightness the screen doesn't update but will used that setting after a reboot. i.e. set brightness to minimum and reboot brightness = minimum, set brightness to maximum reboot brightness = maximum.
After a few reboots and some trial and error I got it at a comfortable brightness.
OK with a little playing around I found that when I use the function keys to adjust the brightness the screen doesn't update but will used that setting after a reboot. i.e. set brightness to minimum and reboot brightness = minimum, set brightness to maximum reboot brightness = maximum.
After a few reboots and some trial and error I got it at a comfortable brightness.
Hope this helps someone.