Closely to my case, however, I can turn it off.
Try this:
1. in Fastboot mode, flash this TWRP https://forum.xda-developers.com/p9/development/twrp-t3565703
2. After that, with usb attach to PC, hold power button and Vol +. with goodluck , you may boot into TWRP.
3. If success, flash this...