Everything seems to work fine in Library, and in Slideshow preview. But, once I "Play" the slideshow, the images are blank, albeit the text overlay (photo titles) show fine. Lightroom has been working fine for years - uncertain if it's the recent upgrade to Windows 10 or Lightroom 6. The video card on this notebook does show "failed" under Lightroom's system info, and the Video Accelerator is unchecked in Preferences. Any suggestions?