Vontar X4 bootloop after eMMC

Hey, everybody,

I have a VONTAR X4. (4/64/1000) I was running CoreElec on USB. Wanted to tweak it a bit and move the installation to eMMC.

Everything went fine in the emmc, unfortunately the box is stuck in bootloop on the VONTAR logo.

Here is how it was solved Vontar X4 Booting problem. Boot logo loop - #9

But unfortunately my box is not detected in the Amlogic Burning tool (WIN does not see it as any device at all).

I tried using Burn Card Maker to create a microSD boot, but unfortunately no success. I think the bootloader is corrupted, but unfortunately I don’t know how to fix it.

Thank you very much for any help and advice