I failed to reflash the tailor-made TK1 board

I used Tegra K1 chip to make a board, and now I tried to use the L4T package downloaded from NV official website to reflash the board in the recovery mode, but I failed to reflash the board. The error information was bootloader download failed. How to solve it? Please kindly advise me .
External Image
External Image
External Image

Hi, which DDR chip are you using? The BCT file you used is H5TC4G63AFR, so is your DDR? Please also check the strapping pins setting in TegraK1_Embedded_Design_Guide.pdf to see if any violation on the RAM_CODE or BOOT device selection.

Hi teslalady,

Have you clarified the cause and resolved the problem?
Any result can be shared?

Thanks

Also don’t forget that using a VM for the host very likely causes USB failures.