dead i9300

i have a dead i9300 mt6577 by spf
i have made a full backup with volcano before flashing it
now it’s totaly dead i can only can do a format

Analysis of USB port,Please insert phone USB cable.
Connecting…
CPU TYPE:MT6577
Hardware version:CB00
Software version:E201
SecCfgVal :0x00000000
BromVersion :0x05
BLVersion :0xFE
Boot downloading complete!
EMMC_ID:0x110100303034473930101FE04D2470E7
EMMC_PRODUCT_NAME: SAMSUNG :0x303034473930
EMMC_BOOT1_SIZE: 0x00200000
EMMC_BOOT2_SIZE: 0x00200000
EMMC_PRMB_SIZE: 0x00080000
EMMC_GP1_SIZE: 0x00000000
EMMC_GP2_SIZE: 0x00000000
EMMC_GP3_SIZE: 0x00000000
EMMC_GP4_SIZE: 0x00000000
EMMC_USER_SIZE: 0x0EC000000(3.69 G)

Format range: Start Address: 0x000000,Format Length :0xEC000000
Flash erasing complete!
or when i write my backup it doesn’t start

here is the logs:

Analysis of USB port,Please insert phone USB cable.
Connecting…
CPU TYPE:MT6577
Hardware version:CB00
Software version:E201
SecCfgVal :0x00000000
BromVersion :0x05
BLVersion :0xFE
Boot downloading complete!
EMMC_ID:0x110100303034473930101FE04D2470E7
EMMC_PRODUCT_NAME: SAMSUNG :0x303034473930
EMMC_BOOT1_SIZE: 0x00200000
EMMC_BOOT2_SIZE: 0x00200000
EMMC_PRMB_SIZE: 0x00080000
EMMC_GP1_SIZE: 0x00000000
EMMC_GP2_SIZE: 0x00000000
EMMC_GP3_SIZE: 0x00000000
EMMC_GP4_SIZE: 0x00000000
EMMC_USER_SIZE: 0x0EC000000(3.69 G)

Analysis of USB port…
>>Flash writing…

stops there and doesn’t start
if any have solution i’ll be greatful.