I think a dedicated topic for all Tanix Tx5 Pro owner is a good idea
TX5 PRO Amlogic S905X 2GB+16GB
Operating System : Android 6.0.1 Marshmallow (last firmware Oct.2016)
CPU : Amlogic S905X Cortex A53
Processor : 1.5GHz
GPU : Penta-Core ARM Mali-450
RAM : 2GB DDR3
ROM : 16GB EMMC
Now For install LE in Tanix Tx5 Pro :
Actually you have 3 method for install LE but just 1 work with Tanix Tx5 Pro (again thank you to Kostaman for explain) :
1. Toothpick method: disconnect the power supply, insert card/drive, use a toothpick to push reset button and connect the power while holding the button. Wait until LibreELEC logo appears and release the button. Used With and Without Device tree. --> Failed (with just the boot animation and no further).
2. Recovery method: boot into Android, insert card/thumb drive and choose Reboot to recovery.(Had to use an APP)
Your box should boot into LibreELEC. --> Failed
3. Recovery method (take 2nd variant): if you have "Update" app pre-installed open it, insert SD card with LE/connect USB drive, and choose any ZIP file in the app for update. Your box should reboot to LE. --> Worked
Just imput a Fake.zip in your SD Card with LE, go to update app on android, Select Fake.zip and press Update.
The box restart and install LE on SD Card
This method work successfuly for LE Jarvis or Krypton
Concerning my experience on the different Build (Jarvis or Krypton).
At First for test i have install JARVIS all work perfectly (just a small problem for turn on wifi for test but i use RJ45) -> Install with "Clean Install with RUFUS"
Second Update Krypton i have try to update Krypton --> Failed box wont boot on SD Card
I try Clean Install with RUFUS --> Worked
Actually i run Krypton on my SD Card and all work perfectly Wifi / Addons / Skin / DB ect...
Last Point : The Remote
Tanix Tx5 Pro have a "simply" remote without Play / Pause / Stop button It's boring with LE for good multimedia experience.
Personnaly i have a Logitech Harmony.
Logitech Harmony know Tanix Brand and Tx5 Pro Device that is good but always not Play Pause Stop button
For resolve that a small trick add device MCE keyboard (or Windows media Center) on your Harmony and configure Play Pause Stop button with (need add USB IR Recever on your tv box) Worked Perfectly
ps : Sorry for my bad english hope all it's clear