I fixed it installing a update.zip via recovery (vol + plus vol - plus power) I found here
This not fixed the phone , but allowed me to unlock bootloader entering in fastboot mode (vol + plus vol - plus plug usb) using this
Then I was allowed to install TWRP as explained here
Then I was able to go to TWRP terminal and type
Phone rebooted into downloader mode and I was able to install this rom with QFIL
and I restored NVRAM with a qcn file I found in Ebay after putting the phone in diagnostics mode. Then I changed imeis, meid and esn to the original ones I found in the box. Phone fixed.
Just note that this file was for a Z90-7 rom and it will not work with a Z40a20 rom.
Hope this helps someone.
Hi, I managed to install twrp ( Chinese) but I can't install any rom .. After successful flashing ROM via twrp, system reboot with lenovo logo, then long vibrates.. When I connect it to PC. It show number of partition and need to format popup.. I tried different ROMs.. All via twrp. I don't use miflash or qfil.. Do I have to use miflash or qfil to solve the problem?? Mi or qfil?
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