Lenovo Tablet 2 1050L boot failure after attempted root
Install latest ADB drivers
http://download.clockworkmod.com/test/UniversalAdbDriverSetup.msi

install intel android drivers on pc
Intel_Android_Driver_1.10.0
https://androiddatahost.com/wp-content/uploads/Intel_Android_Driver_1.10.0.zip

download restore-kitkat-bios-830-1050-v2.exe
http://lenovo-forums.ru/applications/core/interface/file/attachment.php?id=53522

power off tab, start tab by pressing vol+,vol-,power buttons simulteneously and after a short vibrate, leave power button. Tab should now be in boot mode

start restore-kitkat-bios-830-1050-v2.exe and finish process as per instructions in the app

download android version kitkat 4.4
Lenovo_Yoga_Tablet_2_1050L_USR_S000215_1503241130_WW21_ROW
https://androidfilehost.com/?fid=385035244224392223

install via intel platform flash lite tool
http://www.mediafire.com/file/d4be3zrf189k28n/PhoneFlashToolLite_5.5.2.0_win32.zip

and YOU ARE DONE.. NJOY