Always verify your receiver's main chipset before downloading; using the wrong loader version for a specific board can fail or damage the device.
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Your NAND has bad blocks. A like aml-flash-tool includes --skip-bad-blocks . Do not use the standard GUI tool for damaged EROM. stb erom upgrade tool download better
The "best" version of the tool depends on your specific device's chipset. You can typically find manufacturer-specific manuals and downloads on technical community sites like or chipset-specific forums. stb erom upgrade tool download better