I can't get my tablet (m10 FHD plus - TB-x606F) into recovery mode.  I turn it off, then restart by holding both the 'volume up' and the power button, but the only outcome I can get is that it progresses to the 'enter your PIN' screen.  The problem is that I have forgotten the pin.  I have also tried holding both the up and down volume keys and the power keys, but this doesn't seem to work either.

Any suggestions?

So, I have finally found out how to make it work.  Tried every combination I could think of.  Basically, it's as simple as holding down both 'up' and 'down' volume keys along with the power on button.  Once the Lenovo logo came up, I released the power button but kept the other two depressed.  Then the tablet started in recovery mode and I was able to select factory reset.  

I mirror a concern expressed in another post.  After the reset is complete, the tablet wanted me to enter the previous pin (which I had forgotten in the first place - aaagh).  Fortunately, it was sufficient to enter in the Google account used with the device before, but then I had to go to another device on that account and accept the reset.

Hope this helps someone!

This solution worked perfectly. Thank you!!

Oh my got you saved me! Got locked out and could not find how to enter recovery mode ! I tied for the past 2 hours until i found this. Thank you

Yeah - you saved me, too. Thanks a lot.