Tablet use to screen mirror

[Android Central Question]

My Samsung tab 4 use to screen mirror to my Roku tv but now it wont.. i have done system updates on both. Any other ideas?

 

[SpookDroid]

Do any other devices mirror properly onto the TV? Have you tried mirroring the tablet onto another TV or device like Chromecast?

What if you use an app like AllCast? Has anything changed on your WiFi network that might be blocking mirroring traffic? Have you tried removing the devices (tablet from TV, and TV from tablet) so that it asks you for permission again to let you mirror the screen?