This is common. You can usually fix this in the "Service Menu" (usually accessed by pressing Menu + 1147 or Input + 2580 ) under "Panel Settings" -> "Mirror Mode."
Rename the file to TSUMV29.bin or simply U9.bin (if instructed by the source) and place it in the root directory. tsumv29lu firmware
The service menu allows you to fine-tune settings like keyboard type (5-key vs. 7-key), LVDS mapping, and color balance. TSUMV29LU MSTAR - Other Analog ICs - In Stock - LoveChip This is common
Disconnect the power supply cord from the TSUMV29LU controller board. Insert USB: Plug the flash drive into the board's USB slot. tsumv29lu firmware
(Common alternative configuration for Jumper-style variant boards) Essential Service Menu Settings:
