Use a high-quality USB drive (8GB to 16GB). Format it to FAT32 with a 4096 allocation unit size.
Smart features or built-in apps refuse to open or crash constantly. Black Screen: The backlight is on, but there is no image or UI. USB Recovery: Forcing an update via USB is the fastest way to fix a TV that won't boot Step-by-Step: How to Flash the Firmware Tp.mt5522.pc821 Firmware
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