This method works for the Mi Max 2 phones (or probably for other Mi phones) when the screen is stuck in black and power button does not work and when you connect device to the PC you see it as Qualcomm HS-USB 9008 or 9006....
(if you see QHUSB_BULK in device manager (or nothing) you should install drivers as mentioned in link below otherwise skip this) en.miui.com/thread-737909-1-1.html
1. Download Fastboot Rom from this link (the file extension should be .tar or .tgz or .tg) be careful in selecting right device:
en.miui.com/a-234.html
2. Download and install MiFlash tool on PC:
xiaomiflashtool.com/category/download
3. Extract Downloaded rom into a folder
4. Run MiFlash and Browse to select the folder you extracted rom
5. (IMPORTANT STEP, READ CAREFULLY) hold down VOL+ and VOL- buttons simultaneously and connect phone to PC, as soon as possible click on REFRESH and then FLASH buttons. (THIS MUST BE DONE QUICKLY otherwise you will face the error cannot receive hello packat. if you face this error, disconnect the phone from PC, hold down POWER button for at least 20 seconds NOT LESS and close MiFlash and re-open it and repeat step 5)
6. Wait until flashing is done.
7. Disconnect Phone from PC and hold down POWER button until it vibrates.
(if you see QHUSB_BULK in device manager (or nothing) you should install drivers as mentioned in link below otherwise skip this) en.miui.com/thread-737909-1-1.html
1. Download Fastboot Rom from this link (the file extension should be .tar or .tgz or .tg) be careful in selecting right device:
en.miui.com/a-234.html
2. Download and install MiFlash tool on PC:
xiaomiflashtool.com/category/download
3. Extract Downloaded rom into a folder
4. Run MiFlash and Browse to select the folder you extracted rom
5. (IMPORTANT STEP, READ CAREFULLY) hold down VOL+ and VOL- buttons simultaneously and connect phone to PC, as soon as possible click on REFRESH and then FLASH buttons. (THIS MUST BE DONE QUICKLY otherwise you will face the error cannot receive hello packat. if you face this error, disconnect the phone from PC, hold down POWER button for at least 20 seconds NOT LESS and close MiFlash and re-open it and repeat step 5)
6. Wait until flashing is done.
7. Disconnect Phone from PC and hold down POWER button until it vibrates.
