MHA-L29 dead and repair boot problem

[kabo tel]

hello

I have dead Mate 9 by wrong software

phone come to me dead but i am sure its dead by wrong software

also i know how to recover dead phone by dc Phoenix but this first time phone not recovered

all step doing successfully but phone not going to FASTBOOT

i am try with all MHA factory board software

MHA-AL00AM00A069_Board Software_inc_testpoint.dgtks
MHA-AL00A_HLMHAAL00AM00A064_Board Software_inc_testpoint.dgtks
MHA-AL00A_HLMHAAL00AM00A064_Board Software_China_Nonspecific_Android 7.0_EMUI 5.0_05021YVS.dgtks
HLMHAAL00AM00A069_Board Software_China_Nonspecific_Android 7.0_EMUI 5.0_05021YVS_A_2._inc_testpoint.dgtks


here log with some files :

7/4/2018 10:02:58 PM Starting to write device in FASTBOOT mode...
File to update: MHA-AL00AM00A069_Board Software_inc_testpoint.dgtks
Device detected:
COM67: HUAWEI USB COM 1.0 (COM67)

Writing bootloader...
Writing MHA-AL00AM00A069_Board Software_inc_testpoint_4.dtwork...
Writing MHA-AL00AM00A069_Board Software_inc_testpoint_5.dtwork...
Writing MHA-AL00AM00A069_Board Software_inc_testpoint_6.dtwork...

Waiting for fastboot device...
No devices detected in fastboot mode
Error detecting device in fastboot mode
7/4/2018 10:04:14 PM Writing device finished OK

and other flash log :

7/4/2018 10:17:09 PM Starting to write device in FASTBOOT mode...
File to update: MHA-AL00A_HLMHAAL00AM00A064_Board Software_China_Nonspecific_Android 7.0_EMUI 5.0_05021YVS.dgtks
Device detected:
COM67: HUAWEI USB COM 1.0 (COM67)

Writing bootloader...
Writing MHA-AL00A_HLMHAAL00AM00A064_Board Software_China_Nonspecific_Android 7.0_EMUI 5.0_05021YVS_3.dtwork...
Writing MHA-AL00A_HLMHAAL00AM00A064_Board Software_China_Nonspecific_Android 7.0_EMUI 5.0_05021YVS_4.dtwork...
Writing MHA-AL00A_HLMHAAL00AM00A064_Board Software_China_Nonspecific_Android 7.0_EMUI 5.0_05021YVS_5.dtwork...

Waiting for fastboot device...
No devices detected in fastboot mode
Error detecting device in fastboot mode
7/4/2018 10:18:28 PM Writing device finished OK

Hope team to help

[Valdemaras]

So anything changes in device manager? Does it exit usb com 1.0?

[kabo tel]

No !
Phone keep in usb com 1

[Valdemaras]

Then it's flash/ram damaged and only main board replacement could help it.

[rishthav]

Device detected:
COM76: HUAWEI USB COM 1.0 (COM76)
BOOTLOADER File to update: Kirin960_T2_A7.0_V3
01-Aug-19 2:43:24 PM Starting to write device...

Process identifier:17326060


Writing bootloader...
Writing Kirin960_T2_A7.0_V3_3.dtwork...
Writing Kirin960_T2_A7.0_V3_4.dtwork...
Writing Kirin960_T2_A7.0_V3_5.dtwork...

Waiting for fastboot device...

Error detecting device in fastboot mode
01-Aug-19 2:44:29 PM Writing device finished OK


but no disconnection of usb 1.0
MHA-AL00B phone fully dead,no fastboot, no recovery,no led,no charging sign,tried 2 batteries new, but no luck.
when connact in tp usb 1.0 shows but when write bootloader, it disconnects and sometimes goes to usb 1,0 again automatically

Writing bootloader...
Writing HLMHAAL00AM00A074_Board_Software_general_7.0.0_r1_ EMUI5.0_05021YVS_3.dtwork...

USB Device REMOVAL
Type: @oem185.inf,%qcomdevice00%;HUAWEI USB COM 1.0
VidPid: VID_12D1&PID_3609
Instance id: 5&16bdd27b&0&6
Writing bootloader...
Writing HLMHAAL00AM00A074_Board_Software_general_7.0.0_r1_ EMUI5.0_05021YVS_3.dtwork...

USB Device REMOVAL
Type: @oem185.inf,%qcomdevice00%;HUAWEI USB COM 1.0
VidPid: VID_12D1&PID_3609
Instance id: 5&16bdd27b&0&6