Updated the video driver for AMD Radion HD6700 video card.
Unchecked :Preference for Graphic Processor
Still Light room 6.5.1 has blank slide show
Thanks for the reply. I am using Windows 7, 64 bits i5 processor,
I updated the AMD Video driver to Crimson, Beta for Radeon HD6700, and still have the same problem Slide show is BLANK.
What is the username of the Windows account you are working on?