Missing or Broken Files
When you get a 404 error be sure to check the URL that you are attempting to use in your browser.This tells the server what resource it should attempt to request.
In this example the file must be in public_html/example/Example/
Notice that the CaSe is important in this example. On platforms that enforce case-sensitivity example and Example are not the same locations.
For addon domains, the file must be in public_html/addondomain.com/example/Example/ and the names are case-sensitive.
When you have a missing image on your site you may see a box on your page with with a red X where the image is missing. Right click on the X and choose Properties. The properties will tell you the path and file name that cannot be found.
This varies by browser, if you do not see a box on your page with a red X try right clicking on the page, then select View Page Info, and goto the Media Tab.
In this example the image file must be in public_html/cgi-sys/images/
Notice that the CaSe is important in this example. On platforms that enforce case-sensitivity PNG and png are not the same locations.