Nokia Lumia 520 full emmc dump needed

I have got a nokia lumia 520 with ""ERROR : Unable to find a bootable option. press any key to shutdown". problem.

I removed emmc write protection.But the set can not be flashed.

With jtag pinout this set can not be detected,

Plz provide full emmc dump.

Z3X EasyJtag Software ver. 2.4.1.0

Loading eMMC Addon Firmware… IO: 3300 mV
Box S/N: 0401200CB286071B, ,FW Ver.: 01.55
CMD Pullup Level:2062 mV
CMD Active Level:2970 mV
Box IO Level:3300 mV
CLK Rate:14000 khz
HiPower mode is off!
———- eMMC Device Information ———-

EMMC CID : 1501004D384732594300AEFF41DD601E
EMMC CSD : D02701320F5903FFF6DBFFEF96404062
EMMC Manufacturer ID: 0015 , OEM ID: 0100
EMMC Date: 06/2013 Rev.0x0
EMMC NAME: M8G2YC , S/N: 2935964125
EMMC NAME (HEX): 4D384732594300
EMMC ROM1 (Main User Data) Capacity: 7456 MB
EMMC ROM2 (Boot Partition 1) Capacity: 4096 kB
EMMC ROM3 (Boot Partition 2) Capacity: 4096 kB
EMMC RPMB (Replay Protected Memory Block) Capacity: 512 kB
EMMC Permanent Write Protection: No
EMMC Temporary Write Protection: No
EMMC Password Locked: No
Extended CSD rev 1.5 (MMC 4.41)
Boot configuration [PARTITION_CONFIG: 0x38] Boot from:ROM1 (Main User Area)
Boot bus config [177]: 0x00 , width 1bit , Partition config [179]: 0x38.
H/W reset function [RST_N_FUNCTION]: 0x01
High-capacity W protect group size [HC_WP_GRP_SIZE: 0x00000000]
Partitioning Support [PARTITIONING_SUPPORT]: 0x03
Device support partitioning feature
Device can have enhanced tech.
Partitioning Setting [PARTITION_SETTING_COMPLETED]: 0x00
———————————————
Backup saved: M8G2YC_2935964125_20161111_2242.extcsd
Done.