The display models are : LG 42LS75C
The firmware I didn’t check, but the displays are from 2018 and never updated the firmware.
Could the firmware be the problem? It always worked and in the CMS, client and display nothing changed.
Thank you for your reply. There was a change to the root certificate recently which has caused connection issues on some devices, webOS included. You can read more about this change here.
LG released a series of firmware fixes for this, I will send you the link in a private message. Please can you upgrade the firmware on your 42LS75C and confirm if you can now connect to your CMS?
Excellent news, thank you for letting me know that the firmware upgrade has resolved the issue. If you require firmware for any other LG signage displays you are using with your CMS please let me know and I can pass on more links.