Blank Display Screen on JTECH CMS App

Symptoms

Display connects successfully
Screen name appears correctly (e.g., Greenfield)
Content shows as “downloading”
After loading, the screen becomes blank
No error message is displayed
Returning back shows login screen again

Root Cause

The playlists assigned to the screen are scheduled only for specific days and times. Outside of those scheduled windows, no content is available, so the display shows a blank screen.

How to Confirm the Issue

Step 1 – Check Playlist Scheduling

Log into The JTECH CMS Studio
Open the screen (e.g., JTECH-Specials)
Review assigned playlists
Check:
- Days (Monday, Tuesday, etc.)
- Time ranges (Lunch, Dinner, etc.)

If all playlists are time-restricted → this is the issue

Step 2 – Validate by Creating a Test Playlist

Create a playlist with:

No day restriction
No time restriction

Example:
Name: Everyday_All_Day_Playlist
Assign it to the screen and publish.

Step 3 – Refresh Display

Wait ~2–3 minutes for sync
If content still not showing, restart the app or device

If content now displays → issue confirmed

Resolution

Option 1 (Recommended)

Create a default playlist that:

Runs all day
Has no scheduling restrictions

This ensures the display always has content.

Option 2

Add more playlists to cover:

All days
All time ranges

Best Practice

Always include: At least one playlist without scheduling restrictions. This acts as a fallback when no scheduled content is active.

Example Scenario

Screen has the following:

Tuesday Lunch
Tuesday Dinner
Wednesday Lunch
Wednesday Dinner

No content outside those windows. Result: Blank screen. By adding Everyday_All_Day_Playlist the problem was fixed immediately.

Important Notes

This is not a device issue
This is not a connectivity issue
This is not an installation issue

It is purely content scheduling behavior

When to Escalate

Playlist has no restrictions AND still blank
Content does not sync after 5+ minutes
Device fails to connect/login