Did you make your own epg via webgrab+?
I paid someone to take care of my epg issue and we figured out that channel id and name has to be one word and no spaces than everything works. that is a plex bug…stupid oversite. Still cant play hd channels thats also a plex issue but all works fine and epg is correct. You should try to use wrong epg to see if the channels work at all.
I used this epg for a month the names and guide were wrong but all channels played.
http://tvprofil.net/xmltv/data/epg_tvprofil.net.xml
just try it if they all work than that is the issue and modify the config to have the channel name and display name only one word without spaces and all should work
