Y530 unlock BL from fastboot or recovery??

Any way to unlock bootloader from fastboot or recovery mode?
I have a nonworking phone that only BL unlocking will help me.
Does somebody know of anyway to unlock BL without normal booting phone?

The phone is displaying this error when I try to write any firmware from sdcard and even the latest that I know exist for this phone, ie Y530-U00 V100R001C900B515CUSTC432D001

On fastboot mode is displayed this message