Try rendering the timeline. We have just completed 5 major projects using 400+ jpeg 1920×1080 high definition images in each for use on a Sony 46′ Full High Definition Monitor using High Definition Tape via HDMI input, but, we render everything. Go to left side of window above Project File>Edit>Project>Clip>Sequence^ Click and Render Work Area. Good luck.
The red line should go to green, now play the timeline? Activate the timeline by clicking on the light blue window bar , it should go dark blue.You should have the images in the Monitor Window, we do not use split screen.
Karen, Make sure your images are the correct size (pixels)?for your Export requirement.Also the time in seconds for each image is set in Project Settings ours is set at 4 secs, we know nothing of animation but, I suspect this could be part of your problem, if it was set at 1 sec you may not see anything?