How to flash bootloader on NVIDIA Shield Tablet via APX Mode?

Question

Android

After unsuccessful manipulations with the flashing, I received a "kerpich", or rather, the bootloader (bootloader) flew off.
I know that it is possible to restore it and reflash it using a utility called nvflash. However, Google didn't turn up anything specific.

Answer 1

I was also looking for an answer to this question, that's what the Nexus 7 tablet found, but I think the essence does not change:
w3bsit3-dns.com/forum/index.php?s=&showtopic=408283&view=f...
forum.xda-developers.com/showpost.php?p=48507424&p...
I think everything is very bad(