Won't render animation after having already rendered a version I'm very new to blender and not a very techy person. I rendered out a simple animation of a logo as a sequence of png files, then edited it in the video sequence editor. I was able to do this with no problems. 

Next, I made edits to the original blender file of the logo, adding text and lights, and creating different camera moves. This time, when I tried to render out the png sequence, nothing happens. I tried to trouble shoot using questions people have asked in the past, but I still have no luck. 
Can anyone help? Thanks.
You have added an image file to the VSE (Video Sequence Editor) and as you have not added your scene to the VSE, all Blender tries to do is output that one file for each frame.

You can either delete the Image strip from the VSE or disable the Sequencer under Post Processing in the Render settings.