Navigate to Settings > Device Preferences > Reset to wipe out lingering residual cache partitions.
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Try a different USB drive, preferably USB 2.0. hk.t.rt2831p738 firmware
The firmware was never loaded, so the USB stack times out. Fix: Unplug the device, delete stale firmware from /lib/firmware , and reinstall the correct .fw file. Also try a different USB port (preferably USB 2.0, not USB 3.0).
: Pre-installed apps like YouTube or Netflix stop working due to outdated certificates or corrupted cache. Navigate to Settings > Device Preferences > Reset
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: Use a high-quality USB 2.0 drive (8GB or 16GB) formatted to The firmware was never loaded, so the USB stack times out
This means the firmware is wrong for your specific panel. You will need to find the specific firmware file for your panel resolution (e.g., LSC320AN09).
Linux usually misidentifies these newer chips. You need to install the latest dvb-usb-rtl28xxu driver and firmware.
When an eMMC storage chip degrades or becomes corrupt, the TV will completely freeze or show no signs of life, rendering the USB method useless. Professional repair technicians must flash the firmware directly to the board's storage chip.