run
fastboot boot nametwrp.img
after 5 seconds run
adb shell logcat> logcat.txt.
wait 10-15 seconds and stop with ctrl+c
The logcat was saved to pc
run
adb shell dmesg> dmesg.txt
same here...
with latest twrp?
Version with custom graphics support
twrp_phoenix_k30_3.3.1_Q2-06-01-2020
After reboot or boot (5-10 seconds)open cmd and run
adb shell logcat> logcat.txt
adb shell dmesg> dmesg.txt