Using software like AsProgrammer or NeoProgrammer , erase the chip, write the firmware, and verify. This is not for beginners. If you lack experience, contact a professional electronics repair service.
A technical schematic or Service Manual is available on Scribd for engineers requiring circuit layout and power supply data. Tp.sk706s.pc822 Firmware
⚠️ : Never remove the USB drive or unplug the power supply while the TV is actively writing the system firmware. Doing so will corrupt the eMMC chip and require an external hardware programmer (like an RT809H) to fix. TP.SK706S.PC822 Android 11 4K TV Motherboard User Manual Using software like AsProgrammer or NeoProgrammer , erase