LED Softwares offers a paid or premium version of this firmware.
If your TV is stuck on the logo, copy the extracted .bin or .img file to a FAT32-formatted USB drive and insert it into the TV's USB port. Download CV628H B42 1366x768 SamsungIR part1 rar
For most CV628H boards, the service menu can be accessed by pressing Menu + 1147 on the remote. LED Softwares offers a paid or premium version
The firmware for the smart TV mainboard with 1366x768 resolution and Samsung IR remote compatibility can be found through various specialized firmware repositories. Download CV628H B42 1366x768 SamsungIR part1 rar
Below are the most relevant sources for this specific software: A verified link for the CV628H-B42