Looks like RAM failure. Heating phone's back side(after removing back panel with hair dryer for few seconds may help. Not a permanent solution, but for data backup.
Connect usb (not charger) hold vol- + home + power, release power after 5 sec n continue holding vol- + home . If download mode appears flash phone with same csc firmware. If no downlooad mode probably battery or emmc fault.
The last thing you may try is reflashing motoboot.img. But its too dangerous(probably you will end up with dead phone).
Iam not responsible if you end up with a brick.
Your log looks good. use fastboot oem fb_mode_clear and check phone boots or not.
If not try flashing stock with same cid with another pc.
I think its windows driver fault.