The firmware is often distributed in multiple parts. You can access the HK.T.RT2861V09 files through specialized electronics repair platforms: : Offers free downloads for HK.T.RT2861V09 firmware files. KenotronTV
(3840x2160 resolution), you can find the necessary files on technical repository sites. Download RT2861V09 3840x2160 Manta 60LUA19S part03 rar
To download the firmware specifically for the Manta 60LUA19S The firmware is often distributed in multiple parts