SYSTEM NOTICE: Just a heads up, we are doing routine system maintenance on the site. Uploads will be disabled during this time. The maintenance may take up to 24 hours. Thank you for your understanding and patience.
XDA thread at http://forum.xda-developers.com/lg-g-pad-83/development/vk810-4g-official-lollipop-5-0-2-35a08-t3113607/. This is ONLY the new bootloader, for use after the ROM is already installed, and having temporarily reflashed the 4.2.2 bootloader in order to flash something (Xposed or what have you), then you have to reflash this new bootloader in order for the ROM to boot.