How to recover LG H815 dead boot via USB or EMMC? [Answered]

[pakmobiles]

I m New with jtag .i try to repair lg dead board via usb and emmc.but no luck.some time when i select emmc tab the conect button has disabled for click.
usb log
Welcome to Octoplus Pro JTAG Software version 1.5.3.
Started.
Reader #0: FT SCR2000 0
Reader #1: FT SCR2000 1
Reader #2: Generic EMV Smartcard Reader 0

Model Settings:
Interface : USB
Brand : LG
Model : H815
SRF : C:/Program Files/Octoplus Pro JTAG Software/firmwareFolder/LG_H815_USB.srf
Core : Qualcomm MSM8992
Loader : QLoader_v1

Connecting...
Cancelled.

Model Settings:
Interface : USB
Brand : LG
Model : H815
SRF : C:/Program Files/Octoplus Pro JTAG Software/firmwareFolder/LG_H815_USB.srf
Core : Qualcomm MSM8992
Loader : QLoader_v1

Connecting...
Sending loader...OK.
Loader not initialized. Loader is not suitable for this device.
EMMC Log
Welcome to Octoplus Pro JTAG Software version 1.5.3.
Started.
Reader #0: FT SCR2000 0
Reader #1: FT SCR2000 1
Reader #2: Generic EMV Smartcard Reader 0

Please disconnect battery and USB cable.

Model Settings:
Interface : eMMC
Brand : LG
Model : H815
SRF : C:/Program Files/Octoplus Pro JTAG Software/firmwareFolder/LG_H815_EMMC.srf
Voltage : 1.8V
Bus Mode : 1 bit
Bus speed : Auto

Connecting...

ERROR[001]: Can not connect. No target device present.

[Medusa Box]

Hello.

1. USB connection.

As You can see from your Software log, unfortunately USB loader "QLoader_v1" for Qualcomm MSM8992 in Software is not suitable (not compatible) for your device:

Read device size error. Loader is not suitable for this device.

There are few USB loaders for Qualcomm MSM8992 in Software. Try to connect the phone using all these loaders. You need to re-connect the device into "Qualcomm...9008" Mode before trying to connect using another loader.

2. eMMC connection.

ERROR[001]: Can not connect. No target device present.

Here are a few main possible reasons why the device not connected:

1. You have connected battery or USB cable. Before connecting the device You must disconnect the battery and the USB cable, and then connect the device without power, this is important!
2. Some wires are soldered incorrectly. Carefully check soldering of all wires.
3. In the process of soldering, the resistors were burned (damaged) by using soldering iron or the pin pads on the board to which wires were soldered were damaged. Need replace damaged resistors and restore the pin pads on the board.
4. The ends of wires that were soldered, had not been cleared. Wire, that comes complete with Medusa Pro Box, is covered with an insulator, so before soldering need to clean the ends of each wire.
5. Soldered wires are too long. Make each wire as short as possible (3-5 CM length).
6. For GND connection use more thicker wire.

Check all of them and try to connect the device again.

Also, look here: http://forum.gsmhosting.com/vbb/f664.../#post12703954.