Le Hardsoft

cas acer Z530 utilisant mediatek MTK MT6735

There are two types of USB driver for Mediatek devices.
- ADB USB driver for device working and switched on.
- Preloader USB driver to flash the device that is switched off.

flash rom

install   mt65xx-usb-vcom-drivers/  mais ils sont  unsigned

donc il faut utiliser temporairement le mode test de Windows 10

bcdedit.exe -set loadoptions DISABLE_INTEGRITY_CHECKS
bcdedit.exe -set TESTSIGNING ON

  reboot

TELECHARGER DRIVER https://gsmusbdriver.com/acer-liquid-z530-t02

installer driver   MT65xx_USB_VCOM_DRIVERS\MT65xx USB VCOM DRIVERS\Win7\ MDMCPQ.INF

utiliser https://spflashtools.com/windows/sp-flash-tool-v5-1828 

à la fin supprimer le mode test

bcdedit.exe -set loadoptions DISABLE_INTEGRITY_CHECKS
bcdedit.exe -set TESTSIGNING OFF    

OU

https://forum.xda-developers.com/showthread.php?t=1982587

verifier NVRAM

https://androidmtk.com/download-sp-meta-tool 

Combination to enter engineer menu: * # #2237332846633 * # * # *