If the TV boots up but the picture is upside-down or the colors look grainy (LVDS mapping issue), you do not need to flash it again. You can fix this from the hidden : Press Source (or Input) on the remote control.

The target TV motherboard runs a basic bootloader environment that cannot read complex or high-capacity modern storage formats.

TP.SK506S.PB802_Android8.1_RK3126_20221115_update.img TP.SK506S_PB802_v1.4_emmc_4GB_32GB_2023.img

If the standby light doesn't blink at all, the issue might be a physically corrupted eMMC/SPI Flash chip or a faulty power rail on the board, requiring an hardware programmer like the RT809H or RT809F to reflash the chip directly.

Before starting, ensure you have the specific firmware matching your TV's screen resolution panel model number

Unplug the television's power cord completely from the wall outlet. Wait roughly 30 seconds for all capacitors on the board to discharge.