- Dec 2, 2020
The twrp link recommended for this rom is in the post made by the Dev initially, but, either way, this info will be helpful for new members...I thought I would chime in regarding the booting/bootloop issues. After spending hours rescuing, wiping and remounting /system, the unit just would NOT boot (either in 16.x or 17.x), I finally got it to boot doing the following:
1. Download and use the LATEST TWRP 3.3.1-1 as directed from this thread! The kernel and coding within this version did the trick, as I was still using an older version of TWRP (3.2.3-x) that I found for this device from another thread.
2. Power on the device into Fastboot (Hold VolUp + Power)
3. Flash TWRP (fastboot flash recovery twrp-3.3.1-1-TB8504.img)
4. Boot into TWRP--the touch screen may not be responsive--I simply pressed Power to turn off the screen, then pressed Power again--this allowed me to swipe and unlock the screen as well. If this doesn't work, try this a few more times--or use the mouse option as others mentioned.
5. MOUNT /system, /data, /cache
6. WIPE /data and format as needed
7. Reboot back into TWRP so that you can see your newly-formatted /data partition.
8. MOUNT /system, /data. and /cache again (do not mount as Read-Only)
9. Now go ahead and flash your ROM, GApps, etc--then Wipe Dalvik/Cache.
10. Reboot and you should now be able to boot. The process should take no more than 2-5 minutes tops.
*NOTE* For users inquiring about the TB8704v (Tab 4 PLUS), the same applies, PLUS you must also patch your boot image after flashing the ROM (boot-los17.1-tb8704v-xxx.img).