Photoshop just started doing this after I converted my files to a smart object.
What do you mean by "I converted my files to a smart object."???
That sounds like a typical display driver problem.
If you have a PC, visit the web site of the maker of your video card, seek out and download/install the latest display driver for your hardware and OS, and reboot (even if it doesn't require it).
If you're on a Mac, you might find that manipulating the graphics processor-specific settings in your Photoshop-Preferences-Performance dialog (and in the Advanced settings) might help. Make sure to fully Quit and restart Photoshop after making changes there.
I mean I had a bunch of layers and I converted them to a smart object for later use. My video card driver is the latest edition already. Plus, it was working before I converted to a smart object, so I'm not sure what's going on.
I mean I had a bunch of layers and I converted them to a smart object for later use.
When Photoshop makes a smart object layer its renders a composite or all the layer embedded into the smart object to be able to render and display the smart object layer. When you converted the layers into a single smart object layer did the image look the same as before the convert to smart object operation?