Beelink GT1 Ultimate LPN1 stuck in bootloader loop

[vidarls]

Hello good people

First time posting on this forum, though have been a long time follower on this fantastic site.
I seem to be stuck at a problem with my new Beelink GT1 Ultimate that I attempted to upgrade with a AtvXperience firmware S912, though in hindsight from reading on this forum it appears to have a S912b chip that is not compatible with this firmware.

I was using the USB male-male and Amlogic USB burning tool to attempt the upgrade; v2.0.9 to be exact.
First attempt it 'crashed' after having selected 'erase bootloader', though when unticking this and retrying it completed successfully.

Then trying to boot it up on the tv nothing happened, and after that it does not even get recognized by windows anymore.

I managed to hook up a UART serial connection to the board and its evident that the bootloader have been corrupted during the process as it keeps restarting at BL2.
I tried to use the BurnCardMaker and burn the latest available Beelink to the SD card and tried to boot it with the (toothpick method), though nothing appears to be happening on the box when monitoring it on the serial connection (keeps looping as usual).

The serial connection monitoring is showing the following on repeat:
GXM:BL1:dc8b51:76f1a5;FEAT:ADFD318C:80;POC:3;RCY:0 ;EMMC:0;READ:0;0.0;CHK:0;
TE: 100010

BL2 Built : 20:32:17, Sep 8 2017.
gxl g6296b83 - xiaobo.gu@droid12

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
STICKY_REG0: 0x00000000
STICKY_REG1: 0x00000000
STICKY_REG9: 0x00000000
DDR3 chl: Rank0+1 @ 792MHz - FAIL
DDR3 chl: Rank0 @ 792MHz - FAIL
DDR3 chl: Rank0 16bit @ 792MHz - FAIL
STICKY_REG0: 0x00000000
STICKY_REG1: 0x00000000
STICKY_REG9: 0x00000000
DDR4 chl: Rank0+1 @ 792MHz - FAIL
DDR4 chl: Rank0 @ 792MHz - FAIL
DDR4 chl: Rank0 16bit @ 792MHz - FAIL
DDR init failed...
Reset...
GXM:BL1:dc8b51:76f1a5;FEAT:ADFD318C:80;POC:3;RCY:0 ;EMMC:0;READ:0;0.0;CHK:0;
TE: 105422


The content of my SDcard:
E:\>dir
Volume in drive E is SDBURNCARD
Volume Serial Number is 1CC5-E279

Directory of E:\

05-Feb-19 12:25 AM 216 aml_sdc_burn.ini
05-Feb-19 12:25 AM 754,176 aml_sdc_burn.UBOOT
04-Feb-19 08:33 PM 1,163,058,504 GT1_710N1_AP6255.img
3 File(s) 1,163,812,896 bytes

Box SN: LPN1GBLF50043 32G

I'm somewhat stuck at this point so would very much appreciate any input or suggestions you may have to resolve this issue.

[ipguy]

Flashing this firmware unbricked my LPN1

https://beelink-my.sharepoint.com/:f:/g/personal/firmwareservice_beelink_onmicrosoft_com/Ehj69OrJrHxKvIkd956gFC0BljblRELOXEhoNoSaTVF9Yw?e=I LWNQm

[vidarls]

Thanks for your response ipguy, unfortunately I?m not able to flash it with anything at the moment as it?s not getting detected, even tried the nvram stortening with no luck. I think unfortunately this shortening process has completely killed it now as the red light is no longer coming on, and no serial information coming through anymore. So pretty confident that this box is officially dead.

[ipguy]

so holding reset and applying the usb cable doesn't get your beelink connected ?
you're only connecting the USB cable and pressing reset right ?

[vidarls]

Yeah that doesn?t get it detected nor does it when trying to shorten the 2 pins on the board that is supposed to clear the nvram and let it get detected again. Like I said the red light that used to come on before the pin shortening is no longer coming on, nor any serial output from the box anymore.