Develop module shows no image(blue image area, but image shows in Navigator) in Lightroom CC . Using i7 Windows OS 7. I have checked processor and updated driver. Any help would be appreciated
Edit >> Preferences >> Performance
Lightroom >> Preferences >> Performance (on Mac OSX)
Then disable GPU acceleration.
For Windows you should go to the website of the manufacturer of your graphics processor and check for driver updates. After updating you could try switching GPU acceleration on again, otherwise leave it disabled.
On mac GPU updates happen with OS updates.