For the , raw firmware is the nuclear option. It fixes:
If your Zenfone 5Z won't turn on, won't boot into Recovery Mode, but is recognized by a computer as (EDL Mode), you cannot use a standard update.zip. You must use raw firmware (often flashed via tools like QFIL or the ASUS Flash Tool) to revive the device.
Method 2: Using Qualcomm EDL Mode (For Hard-Bricked Devices)
This comprehensive guide outlines the fundamentals of RAW firmware for the ASUS ZenFone 5Z (ZS620KL) Go to product viewer dialog for this item.
Obtain the correct RAW firmware for the ZS620KL from a reliable source or the ASUS Support Center if available.
If you have downloaded a full firmware .zip file (like the OTA updates from ASUS's official website), you can install it using the phone's stock recovery menu. This method is less intrusive and does not typically wipe your data unless you manually choose to.
After successfully installing raw firmware on your ZenFone 5Z: