Originally Posted by boomboomer
First flash a full stock rom, factory reset in recovery before first boot. This might enable your efs to be read again.
Your problem happened due to instant shutdown, which corrupted one or more partitions. Don't ever let the battery get near zero, the emmc chip is very easily broken.
If stock firmware fails then pay for a repair, make sure it fully works on 4.3 before you pay.
Sure mate, I'm downloading the latest stock firmware from sammobile. Will flash it trought odin and will report news soon.
Hope it comes back to life again.
EDIT: Ok so it failed, maybe my usb port or cable, so I will try again.
This is the result:
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> I9300UBUGNE1_I9300ZTOUGNE1_I9300UBUGNF1_HOME.tar.m d5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/007> Odin v.3 engine (ID:7)..
<ID:0/007> File analysis..
<ID:0/007> Get PIT for mapping..
<ID:0/007> Firmware update start..
<ID:0/007> NAND Write Start!!
<ID:0/007> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
EDIT2: Aaaaaand nope. Stills dead.
Thanks for the advice anyways!