Unfortunately, that does NOT change the image.
I can insert a relative or full URL and the image does not change. I can open the edited image in the web browser (using its original path--see below), but it will not change within the admin console.
The expected result after I DELETE (rename) or MODIFY the original image it would change the image by default. That is what SHOULD occur and would be considerably easier than all of these failed code edits.
original image:
/public_html/skins/admin/en/images/logo.png
Renamed to logo.png.original
Replaced by image of identical size and name (logo.png)
IMAGE DOES NOT CHANGE IN ADMIN!!! Where else is the original image hiding and preventing changes?