Huawei P20 Lite bricked? - Huawei P20 Lite Questions & Answers

Hi everyone! I'll explain my problem with this phone, sorry for any error because i'm italian and a complete android noob!
My girlfriend gave me her P20 lite which looks like it's bricked. She said that the phone was charging and she was speaking on the phone and suddenly the phone shut down.
Trying to reboot the phone was useless: it showed the huawei logo and then it just rebooted again. The phone only did this while under charge. If I unplug the usb cable it just tried to boot up, showed the huawei logo, shut down and then a green screen with red and blue boxes showed up for 1 second.
I tried to boot the phone with Volume up + power to enter recovery and this screen showed up: https://imgbb.com/zQ76Ywx
I tried to do option 1 and 2 but in both cases the phone just rebooted with the huawei logo and continued to reboot.
Booting the phone while pressing Volume down + power brought me in fastboot mode: https://imgbb.com/dmHQxB0
I understood that PHONE Locked and FPR Lock means that the bootloader is locked. I assume this is normale because my girllfriend is not into modding. The phone was 100% stock.
In fastboot mode i was unable to do anything. So I rebooted, unplugged the cable and just like before the green screen came up: https://ibb.co/sFWmgZv
Next step was connecting the phone to HiSuite: nothing to do, the phone was not recognised.
I tried to download a modified HiSuiteConfig.xml with support for P20 Lite, put the phone into fastboot and perform a system reset: nothing to do, it said that the phone was not supported. After trying this, The phone changed behaviour. It doesn't show anymore the huawei logo while booting, I can only see a black screen with a red led flashing followed by the green screen with red and blue boxes and continues with this loop. I am not able anymore to boot with volume up + power but only in fastboot mode.
Last thing I tried was the testpoint mode:
I downloaded this IDT Tool with firmware: https://mega.nz/file/jEoWRSAZ#sltXiQMt3kNNIEbq30WYuJTme0AoZMKRpbEtMu3-Mx4
I downloaded this driver for testpoint mode: https://androidfilehost.com/?fid=17248734326145712518
I recoreded a small video to show all the step i did:
Please note this: at the beginning the phone is connected in fastboot mode and is recognised by windows as "Android Composite ADB Interface"
Then, I reboot the phone and shortcircuiting the testpoint: the phone is recognised as "HUAWEI USB COM 1.0(COM5)"
When I start the procedure with IDT Tool after the first completed the step the phone disconnect and reconnect itself and is once again recognised as "Android Composite ADB Interface". Is it the correct behaviour?
However, the procedure fails and I couldn't find anything about error 39 of IDT Tool.
Sorry for the long message, but I wanted to explain carefully what happened.
Do you have any suggestion?
EXTRA INFO: I installed fastboot on my pc with this tool: https://forum.xda-developers.com/t/...s-adb-installer-v1-4-3.2588979/#post-48915118
I run the following commands:
fastboot oem get-product-model
...
(bootloader) ANE-LX1
OKAY [ 0.000s]
finished. total time: 0.000s
fastboot oem get-build-number
...
(bootloader) :ANE-LX1 9.1.0.381(C432E7R1P7)
OKAY [ -0.000s]
finished. total time: -0.000s

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pspmaster said:
green screen with red and blue boxes
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pspmaster said:
black screen with a red led flashing
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Probably HW issue (emmc memory dead, out of order, or in r /o mode).
If in the process of installing the board firmware you get an error like on the screen, this confirms a memory error.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

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I was watching the video I posted above at 0.25x speed and yes, just before failing with error 39 e can see this message. So it is an hardware issue memory related and is not fixable. The only solution would be to change the entire motherboard correct?

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pspmaster said:
The only solution would be to change the entire motherboard correct?
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Click to collapse
I'm not sure bro, I don't work in a service center, it's just my hobby... Complete motherboard replacement is too expensive if you don't have a phone warranty. But it is possible to replace only the emmc memory, ask the service center, or google it. Good luck!

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of course mate, thank you for your support!
I think I will pass, changing the whole board is too expensive and changing the memory chip is far beyond my capabilities. The official service center would be too expensive considering the value of the phone.