jkm lx1 dead boot tutorial help

how to write dump file with ufi. bcoz i try 2 phone not alive

1 backup 512mb file
2 user part saved like modem modem2 etc...
3 formated emmc
4 partition gp (emmc helth report ok ) done
5 write dump file
6 write user part

phone not alive
please help me. mybe some thing wrong?