Verify all is, as Alex said in '15 on Modules page in CMS not layouts page.
That Alex’s post you’ve quoted was about something entirely different ie wrong setting for download window start/end time in display profile.
By default this is set to 00:00 and 00:00 which means it’s always open and player will download any required files when it needs to - after it will check in with CMS, in 1.7 series it will do that each collection interval, which is a setting also in display profile.
You probably should not search for solutions from '15 that are regarding specific issues not directly related to the one you’re having - unless you also modified the download window start/end time in a odd way.
Can I see a screenshot of status window on your device when the issue occurs please?
Is the default layout assigned to your display valid?
If anything the topic that you should look at regarding your problem is this one - Why won't my layout play? / The splash screen plays instead of my layout