Not often, but in some rare situations, the slideshow can freeze, or have a very long delay, on a particular photo.
- Be sure you are using .jpg and .png format in your photo because maybe the photos are already edited in another format that not suitable to the frames processor.
- The photo you currently see on the frame may not be the photo that has an issue.
- Determine the next photo in the sequence on the USB or SD Card that would be shown and it's possible that next photo has an issue. So it appears to be frozen on a photo and to note that photo is ok. The frame's processor is just busy or stuck on presenting the next photo which may be a very high resolution or a non-standard photo format such as from a scanner.
The best way is to delete the photo on your USB or SD Card, then copy the original copy of the photo to the memory device. If that doesn't resolve the issue, converting the photo will clear many issues from abnormal photos.