Can't get into Fastboot-Mode of Lenovo Yoga Tab 3 Wifi YTX703F

Hi There,
I can not get into Fastboot Mode of the Lenovo Yoga Tab 3 Wifi YTX703F. Not by pressing Power and Volume +, not by cmd: “adb reboot bootloader”
Bootloader is unlocked in developer settings, also USB debugging es enabled.

The Tablet get stucked with the orange Lenovo Logo for ours, but nothing else…
To get into fastboot mode it is necesary for e/os, TWRP, …
Anybody nows help?
Thanks!

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Did you go through the process indicated https://doc.e.foundation/devices/YTX703F/install

  1. Enable OEM unlock in the Developer options under device Settings, if present.
  2. Accept the terms that you understand that you’re voiding your warranty by choosing to unlock your bootloader.
  3. Login with your Lenovo account (if you already have one) or create a new one.
  4. A 14 days countdown timer will start. This is specific per device.
  5. After the waiting period, go back to OEM unlocking so that the Lenovo servers can toggle the bootloader unlock switch.

Hi There,
I got it!
The problem was, that I had to press “Power button” and “Volume down” at the same time (or short after) typing “fastboot reboot” in cmd on PC… that’s it…
If not, the Tablet will replace the custom recovery automatically during first boot…

thanks aibd, yes I did it like indicated…