I am using LR 5.7 on a Windows 7 Professional 64-bit SP1 PC.
I've been told to Uncheck the option Use Graphics Processor to solve my problem. I am trying to create a slideshow and when I click Play or Preview, it gives me the Title and a black screen.
Thanks for your help.
It's under Edit > Preferences > Performance (Lightroom > Preferences > Performance on a Mac).
You don't have that option in Lightroom 5.7. The graphics processor option was added in Lightroom 6/CC. You might want to check to ensure that your graphics driver is up to date.