(Resolved) U9-H looping on startup...totally bricked ?

[Sadar]

Hello everyone,

I tried the solution https://theminixforum.com/index.php?threads/how-to-recover-unbrick-the-u9.311/ It it doesn't work because it loops on:

GXM:BL1:dc8b51:76f1a5;FEAT:ADFD718C:0;POC:3;RCY:0;EMMC:0;READ:0;0.0;CHK:0;
TE: 136356

BL2 Built : 14:17:47, Apr 18 2017.
gxl g95dc662 - xiaobo.gu@droid05

set vdd cpu_a to 1120 mv
set vdd cpu_b to 1050 mv
set vddee to 1000 mv
Board ID = 1
CPU clk: 1200MHz
DQS-corr enabled
DDR scramble enabled
DDR3 chl: Rank0+1 @ 912MHz - PASS
Rank0: 1024MB(auto)-2T-13
Rank1: 1024MB(auto)-2T-13
DataBus test pass!
AddrBus test pass!
-s
Load fip header from eMMC, src: 0x0000c200, des: 0x01400000, size: 0x00004000
New fip structure!
Load bl30 from eMMC, src: 0x00010200, des: 0x01100000, size: 0x0000d600
Load bl31 from eMMC, src: 0x00020200, des: 0x10100000, size: 0x00015400
Load bl32 from eMMC, src: 0x00038200, des: 0x05300000, size: 0x0002ee00
Load bl33 from eMMC, src: 0x00068200, des: 0x01000000, size: 0x000ad000
aml log : SIG CHK : 300 for address 0x01000000
reset...

To see this, I connected to the JDEBUG1

Of course I tried : "unplug the power from the U9, insert the USB Stick. Plug in power again and then press and hold in the power button for at least 6 seconds", but it doesn't work too

I also tried to flash with USB_Burning_Tools without success: the box is not detected

There is ICE1 with connector pins RESET, DAT, CLCK, GND. Anyone know how to use it ?

Does anyone know a solution to break this boot sequence and force the boot to the SD card or to the USB STICK ?

Is it possible to connect with the serial port and load u-boot located on the SD card or on a usb stick manually ?

help would be appreciated

 

[Sadar]

Ohhh Yeahhhhhhh

I found a solution

I had read some post https://theminixforum.com/index.php?threads/minix-u1-bricked.3855/ and https://theminixforum.com/index.php?threads/emmc-reset-pads.4430 / which showed how to put a paper clip or a screwdriver on the motherboard to make a short circuit (...)
Ok, as my U9-H was not working I tried various short circuit until the boot loop froze to show

GXM:Fixed PLL lock failed
BL1:dc8b51:76f1a5;FEAT:ADFD718C:0;POC:3;RCY:0;EMMC:400;NAND:81;SD:0;READ:0;CHK:AA;USB:8;0.0;

reset...
GXM:BL1:dc8b51:76f1a5;FEAT:ADFD718C:0;POC:3;RCY:0;EMMC:0;READ:0;0.0;CHK:0;
TE: 132890

BL2 Built : 14:17:47, Apr 18 2017.
gxl g95dc662 - xiaobo.gu@droid05

set vdd cpu_a to 1120 mv
set vdd cpu_b to 1050 mv
set vddee to 1000 mv
Board ID = 1
CPU clk: 1200MHz
DQS-corr enabled
DDR scramble enabled
DDR3 chl: Rank0+1 @ 912MHz - PASS
Rank0: 1024MB(auto)-2T-13
Rank1: 1024MB(auto)-2T-13
DataBus test pass!
AddrBus test pass!
-s
Load fip header from eMMC, src: 0x0000c200, des: 0x01400000, size: 0x00004000
New fip structure!
Load bl30 from eMMC, src: 0x00010200, des: 0x01100000, size: 0x0000d600
Load bl31 from eMMC, src: 0x00020200, des: 0x10100000, size: 0x00015400
Load bl32 from eMMC, src: 0x00038200, des: 0x05300000, size: 0x0002ee00
Load bl33 from eMMC, src: 0x00068200, des: 0x01000000, size: 0x000ad000
GXM:Fixed PLL lock failed
BL1:dc8b51:76f1a5;FEAT:ADFD718C:0;POC:3;RCY:0;EMMC:400;NAND:81;SD:0;READ:0;CHK:AA;USB:8;0.0;

I used usb_burning_tools provided here https://files.theminixforum.com/sha...FW001-Android_7.1.2-20191120-Burning_Tool.zip and flashed my U9-H

For the U9-H, I made a short circuit on R32 (see attached files)

 

[Villa]

@Sadar can I ask, what did you do to the device in the first place for it to start looping on start up?

 

[Sadar]

Yes of course.

I booted the U9-H with an SD card with Debian u-boot. I deleted all emmc android partitions. I restarted without having created new partitions or boot loader on emmc because I believed that the boot would be done automatically on the sd card (...)

It was when I restarted that I had this problem.

I know Linux but I'm a newbie and discover u-boot and the particularities of TV boxes.

For the moment, I am trying to understand how to format emmc correctly to boot with u-boot and Debian.

I understand how u-boot works with the dtb file, but I have doubts to do the bootloader and the boot partition.

Like now unbricked the U9-H is not a problem , I'll try a classic Linux method a bootable fat partition (with the bootloder) for the u-boot and an ext4 partition for the system.

My goal is to recycle my U9-H into a DHCP + ADGUARD Home server. 2GB Ram 16GB emmc with an octo-core S902-H is more than enough!