Turn off the television completely and unplug the power cord from the wall.
Before updating, check your current firmware version via: t.ms638.733 firmware
Fixim.ru. нужна прошивка . Available at: https://fixim.ru/problem/q99409-нужна_прошивка Turn off the television completely and unplug the
Press and hold down the physical located on the TV chassis panel (not the remote control). t.ms638.733 firmware
If the bootloader itself is corrupted, the TV will not read a USB drive. Technicians must fix this by using an online ISP programmer (such as the RT809H or RT809F) to rewrite the EMMC chip directly.
: Once the blinking stops or the TV restarts automatically, remove the USB drive. Service Menu Codes
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