Power on the TV; the indicator light should begin blinking, signaling the update is in progress.
This specific firmware is tailored for 1366x768 (HD Ready) displays. Download MS338 PB801 1366x768 REF40 part4 rar
If the TV continues to restart, you may need to perform an EMMC software update instead of the standard USB method. Power on the TV; the indicator light should
Do not turn off the power during this process to avoid "bricking" the board. Power on the TV
Always back up your original firmware using a tool like the RT809F programmer before attempting an update.
Extract the .rar parts to obtain the firmware file (usually named allupgrade_ms338_2G_sos.bin or similar) and copy it to the USB root directory. Update Procedure: Insert the USB into the TV's port while it is powered off.