Windows 7 Dark on Cinema Display

[macpeach55]

Hi,
I have an iMac 21.5" Mid 2011 with a 27" Cinema Display as a second screen.
If I boot into Windows via Bootcamp, (with only the 27" on), the display is still quite dark even at full brightness.
If I am in Yosemite & use Parallels, I can get both screens (& so Windows) much brighter. I have checked the settings within Windows 7 and all is at max - any way to fix this?

 

[yjchua95]

Hi,
I have an iMac 21.5" Mid 2011 with a 27" Cinema Display as a second screen.
If I boot into Windows via Bootcamp, (with only the 27" on), the display is still quite dark even at full brightness.
If I am in Yosemite & use Parallels, I can get both screens (& so Windows) much brighter. I have checked the settings within Windows 7 and all is at max - any way to fix this?

Have you disabled adaptive display brightness from power options in Windows?

 

[macpeach55]

Have you disabled adaptive display brightness from power options in Windows?

Sorry for my delay in replying.
Yes, it is set to Off