I had a look into the DisplayIDs, thanks for supplying the additional info.
Math Word Wall is offline (red dot). Looks like it's on ChrOS on Chrome 44. We recommend locking the Chrome version to 47 as well as other configurations for ChromeOS (see Chrome OS Installation.
POCSDS2 - Staff Lounge looks like it's online (green dot). Is there anything else that you see on this Display?
POCSDS4 - FRONT TV looks like it is offline (red rot) and it's on the CAP. I've noticed that it's on another version of CAP - if you can please uninstall and then reinstall with the version that is available on the Create a Display page.