A pre-rooted version of the latest Fire TV software update, version 22.214.171.124, has just been released by rbox. This update introduces several Fire TV bug fixes, including a fix to the blank screen issue that some users have been experiencing. Grab the update file from the ROM page and install it like you would any other ROM on a rooted Fire TV.
If you’re new to Fire TV rooting, check out my starters guide to learn how to root your Fire TV and how to install the latest pre-rooted ROM. As always, this pre-rooted ROM will not help you root a Fire TV, since your Fire TV must already be rooted to install it. The purpose of this pre-rooted ROM is to update rooted Fire TVs to the latest software version without losing root.