Known for hosting the TP.MS338.PB819 USB Firmware and factory service codes.
Power off the TV, insert the USB, and hold the power button while plugging it back in. The standby light should blink, indicating the update is in progress. Download MS338 PB819 1366x768 REF30 part09 rar
Firmware for these boards is typically hosted on specialized TV technician forums or shared via Google Drive links from repair communities: Known for hosting the TP
Use WinRAR or 7-Zip to extract "Part 01"; it will automatically pull data from Part 09 and other pieces to create one single firmware file. insert the USB