مدعوم على eazy jtag
for repair empty product code 1st. need try write rom2. product code there.
if after rom2 writing no any changes, then problem with emmc.
you can try Format emmc.
after format emmc goto factory status and need repair exscd.
after repair excsd need flash again rom1 and rom2.
and then flash via odin.
if something wrong while this steps - then unknown problem with emmc and cant be fixed.
From my test and report of users: 70% of problems with DIRECT EMMC read/write - long wires, GND wire bad, voltage not stable or not right, bad soldering. Remember connect direct emmc is more complicated than JTAG connect.