best team help

i have lumia 520 with stuck on this error

error: unable to find a bootable option press any key to shut down

i try same product coe but best show this error

Core : v2.14 , WP8x FlashEngine : v9.4

FFU : RM914_3058.50000.1425.0001_RETAIL_im_mea3_380_01_4 46538_prd_signed.ffu
Checking FFU file, wait…
FFU Revision ID : 2.0
FFU Model ID : Nokia.MSM8227.P6036
FFU RootKeyHash : F771E62AF89994064F77CD3BC16829503BDF9A3D
FFU Languages : Albanian , Arabic , Azerbaijan(Latin) , Belorusian , Bulgarian , Catalan , Croatian , Czech , Danish (Denmark) , Dutch (Netherlands) , English (UK) , English , Estonian , Filipino (Philippines) , Finnish , French , German , Greek , Hwbre (Israel) , Hindi (India) , Hungarian , Indonesian , Italian , Japanese , Kazakh , Korean , Latvian , Lithuanian , Macedonian , Malay (Malaysia) , Norwegian (Bokmal , Norway) , Persian (Iran) , Polish , Portuguese(Brazil) , Portuguese(Portugal) , Romanian , Russian , sr-latn-rs , Chinese , Slovak , Slovenian , Spanish(Mexico) , Spanish , Swedish , Thai , Chinese(Taiwan) , Turkish , Ukrainian , Uzbekistan(Latin) , Vietnamese ,
FFU ChipSectors : 15155200
FFU Header : 0x000E0000
FFU Payload : 0x60040000
FFU FastVerify : Ok

Waiting for phone…
Boot Repair mode is selected
1. Charge battery fully , insert in phone
2. Insert USB cable
3. If phone stuck in boot mode or shows Blue Screen – follow repair manual

Waiting for phone in DLOAD …
PARAM : 08/01/0600/90
DLOAD : PBL_DloadVER2.0
Switching to FlashProgrammer…
FlashProgrammer init Done!
Sub Init Ok, eMMC , 0x00003C00
Secure Mode init Ok
[Program Mode] : INIT FAILED : eMMC not answer!
Reasons :
1. If TestPoint used – DON’T hold it after device connected!
2. SBL or something else BLOCK write (Due wrong repair) JTAG/eMMC connection required!
In other case – eMMC fault or some short, check HW!
Error while repairing 🙁

please help how back my phone to life

thanks