You can find threads and potential firmware download links specifically for this board.
To access the service menu, use the remote sequence Menu + 1147 . Download MS338 PB803 1366x768 Stream part08 rar
Search for "Smart TV Software" channels like hashmielecom which list factory codes and software files for various MS338 series boards. Installation Warning You can find threads and potential firmware download
Typically used to recover "soft-bricked" TVs (stuck on the logo), update the Android OS, or fix resolution issues. Where to Find the Download update the Android OS
Firmware for these Chinese universal boards is usually hosted on specialized technician forums or shared via cloud storage links: