: Many technicians share firmware in specialized groups like Softwarezone.ga or hashmielecom . You can search these channels using the keyword "MS338 PC821".
: Place all downloaded parts (Part 1 to Part 5) in one folder. Right-click Part 1 and select Extract Here (using WinRAR or 7-Zip) to get the final .bin file.
: Sites such as LED Softwares often list specific board firmwares for download. Download MS338 PC821 1920x1080 Santron India ref66 part5 rar
: Place the extracted firmware file (usually named allupgrade_ms338_2G_ref66.bin or similar) into the root directory of the USB drive. Do not put it in a folder. Flash the TV : Turn off the TV and unplug it from power. Insert the USB drive into the TV's USB port. Plug the TV back in.
The standby light should start flashing rapidly, indicating the update is in progress. during this time. : Many technicians share firmware in specialized groups
Once you have obtained the multi-part RAR file (specifically "part5" suggests you need all parts in the same folder to extract successfully), follow these steps to update your TV:
: If the TV still boots, try to backup your current settings or firmware if the menu allows. Right-click Part 1 and select Extract Here (using
: Search for "Santron India" or "TP.MS338.PC821" on forums like Lab-Electronics or specialized YouTube technician channels like LED LCD Technician . Installation Guide