try with the usb core recovery copy the files mb140.bin and usb_auto_update_G9.txt on an empty usb stick fat32 formatted insert the usb stick in the tv while holding down the button OK on the remote control, plug the power cord to AC mains keep holding the button OK when the standby led starts to flash quickly, release the button OK and wait when the recovery is finished, the tv will turn on by itself if it works, perform a first installation
# & lt; - this is for comment / total file size must be less than 4KB
# console ok
#For pure MBOOT.bin upgrade, use below part
#fatload usb 0:1 80400000 mb140_mboot.bin
#spi_wrc 0x80400000 0x00000000 0xA0000
#---------------------------------------------------------------------
### check file exist or not
fatload usb 0:1 80400000 mb140.bin
#---------------------------------------------------------------------
### direct partition
### Write MBOOT, LEN = 0xB0000
spi wrc 0x80400000 0x0 0xB0000
### Write KL, LEN = 0x100000
spi wrc 0x804B0000 0xB0000 0x100000
### Write ROOTFS, LEN = 0x130000
spi wrc 0x805B0000 0x1B0000 0x130000
### Write VENDOR, LEN = 0xA90000
spi wrc 0x806E0000 0x2E0000 0xA90000
### Write KEY_BLK, LEN = 0x10000
#spi wrc 0x81170000 0xD70000 0x10000
### Write REV_BK, LEN = 0x10000
#spi wrc 0x81180000 0xD80000 0x10000
### Write BOOTLOGO, LEN = 0x20000
#spi wrc 0x81190000 0xD90000 0x20000
### Write CONF_BK, LEN = 0x50000
#spi wrc 0x811B0000 0xDB0000 0x50000
### Write CONFIG, LEN = 0x200000
#spi wrc 0x81200000 0xE00000 0x200000
### sync environment.txt
setenv sync_environment 1
saveenv
reset
% & lt; - this is end of file symbol