Unstuck phone or tablet from fastboot mode

To reboot phone or tablet from fastboot mode:
  1. Download and install adb fastboot - adb-setup-1.4.3.exe (https://forum.xda-developers.com/showthread.php?t=2588979)
  2. Connect device to PC. If device is already connected to PC, reconnect device.
  3. Open Terminal in adb folder
  4. Type:
    fastboot devices
  5. Find your device and type
    fastboot reboot
After this, your device will be rebooted to the normal state and Android will be loaded normally.