On my status map, no images are displaying. There seem to be in the correct folder but nothing is showing up at all…could this just be permissions on the folder? Permission wise the nagios images folder is set for owner and group view and modify, all others view and owner and group set to root.
Try to type logos in the search field of the forum and read the threads already discussed on that topic.
If you don’t find anything that solves your problem, check the cgi.cfg file and see which folder is specified there for physical HTML path and check nagios.cfg if you have included hostextinfo.cfg files to config file list. Also you could post here these setiings if you don’t know what to do with them so we could help you.