putting stuff together as didn't work at first... (read: forums threads are not always good to follow. Don't panic if somethign doesn't work as expected)
Here's how reset the device, straight from the Google mouth:
- Turn off the Nexus.
- Press and hold Volume Down and then press and hold Power until the tablet turns on. ...
- Press Volume Down twice to highlight Recovery Mode. ...
- Hold down the Power button and press and release the Volume Up button once.
downloads: Recovery Clockwork Touch http://download2.clockworkmod.com/recoveries/recovery-clockwork-touch-6.0.4.3-flo.img
lineage OS https://download.lineageos.org/flo
Open GAPS http://opengapps.org/ note: I downloaded flavour. Had to try few times to fit on device.
( SuperSU https://download.chainfire.eu/368/SuperSU/UPDATE-SuperSU-v1.75.zip?retrieve_file=1 )
adb reboot bootloader
fastboot oem unlock
fastboot flash recovery recovery-clockwork-touch-6.0.4.3-flo.img
// boot device in Recovery Clockwork // from bootloader select Recovery
// copy stuff to device using adb adb push 'UPDATE-SuperSU-v1.75.zip' '/sdcard/0'
adb push 'lineage-14.1-20170613-nightly-flo-signed.zip' '/sdcard/0'
// wait until copied
“Wipe data/factory reset” "Wipe cache partition" “install zip" "install from sideload”
use adb
after installing lock again
fastboot oem lock ... (bootloader) Locking bootloader... (bootloader) Locking bootloader done! OKAY [ 0.081s] finished. total time: 0.081s