The Link Checker is automatically on, and it's a great (and easy) way to see if your guides contain any broken links. Each week, the link checker checks the validity of links in: Links, Book Assets, and Database.
To see the Link Checker report, click on Tools> Link Checker in the orange bar at top. You can filter the report by Owner to see the list just for your guides.
Please note that there may be some false returns in your list of broken links. The Link Checker relies on the response from any given server at the moment when it's "pinged" for validity. There are a few possibilities as to why something might be listed as an invalid link, even though it is valid:
Please also note that the link checker cannot check links in the "Rich Text/HTML" area for any box type.