Do you have the from the back of your TV to help narrow down the exact software version?

search for firmware - Servis | Changhong Europe Electric s.r.o.

To download the firmware or software for your (specifically for the mainboard SSDV3241-ZC

: Note that Changhong advises only performing an update if your TV is experiencing specific issues, as the downloadable version might not be newer than what is already installed. Technical & Repair Resources