If records don't have cover art there are two things you can do.
First, check and make sure the record has the relevant ISBN (020 tag), ISSN (022 tag) or UPC (024 tag) in the MARC record. If the UPC (in the case of a DVD) is missing add it, save the record, and check to see if the cover art displays.
If the relevant identifier tags (ISBN, ISSN, or UPC) are in the MARC record and the cover art is still not displaying you can email Content Cafe (they supply the cover art). Contact BC Libraries Cooperative Support for the email address, and in your email to Content Cafe please include the ISBN, ISSN, or UPC and the title.
It usually takes two or three days for the missing cover art to be added.