svdmk

Two same boards but different cpu.
Rockchip labeled works fine with armbian, multitool and libreelec.
The board with huawei labeled cpu has the previously described problem, multitool and armbian stop working after a minute.
Method of switching bootloaders suggested by @jock  works.

Two same boards but different cpu.
Rockchip labeled works fine with armbian, multitool and libreelec.
The board with huawei labeled cpu has the previously described problem, multitool and armbian stop working after a minute.
Method of switching bootloaders suggested by @jock  works.

Two same boards but different cpu.
Rockchip labeled works fine with armbian, multitool and libreelec.
The board with huawei labeled cpu has the previously described problem, multitool and armbian stop working after a minute.
Method of switching bootloaders suggested by @jock  works.

You are so right.
 
What a surprise when I removed the heatsink!
 Probably that's why this board has trouble during booting process.

That's right.
I use multitool only to erase internal flash and then use rkdeveloptool to flash loader and image as it is described in first page.
The device boots from sdcard in both cases, blank or flashed emmc but if there is a proper partition on internal flash Armbian works right, otherwise turns off(I heve tried to erase emmc and create partition with fdisk tool in Armbian, and OS works properly ). Armbian boots from internal flash too.
I think booting issue and turning off after minute are two different cases. Turning off probably is some kind of interaction between RAM and EMMC into EMCP chip itself(kingston 08emcp08-el3cv100).
This is dumped android firmware:
https://drive.google.com/file/d/1ZLl-KCvGS47SAO8tY1YDvCHDv6YWIWRP/view?usp=sharing

That's right.
I use multitool only to erase internal flash and then use rkdeveloptool to flash loader and image as it is described in first page.
The device boots from sdcard in both cases, blank or flashed emmc but if there is a proper partition on internal flash Armbian works right, otherwise turns off(I heve tried to erase emmc and create partition with fdisk tool in Armbian, and OS works properly ). Armbian boots from internal flash too.
I think booting issue and turning off after minute are two different cases. Turning off probably is some kind of interaction between RAM and EMMC into EMCP chip itself(kingston 08emcp08-el3cv100).
This is dumped android firmware:
https://drive.google.com/file/d/1ZLl-KCvGS47SAO8tY1YDvCHDv6YWIWRP/view?usp=sharing