This is usually one of two issues that can arise. Either the computer is not communicating with the display or a firewall is blocking the content. To check this follow these steps:
1. Go to the My Signage section of DCI Desktop and check to see if a green status light appears on the sign connection. If the connection is red, refer to the issue labeled “I am not able to send messages to my sign, but it is still playing messages.”
2. Check to make sure Windows Firewall is disabled. This can prevent images or videos from being uploaded due to compressions it does not recognize.
3. Disable any Anti-Virus or 3rd party Firewalls. Try to resend the message afterwards.