[YU Yureka Q&A, Help & Troubleshooting] quakze:
This method has been shared by DoomLord. Please note that the following are UNOFFICIAL steps and these will not be supported officially...So don't mention about this to Customer Care

Setting up

Step 1] Install QPST (2.7.422) tool - We will be using the QFIL tool which is part of QPST package

Step 2] Install the Qualcomm Download Mode Driver 9008 on Windows PC

The required drivers are in the folder QualcommDownloadModeDriver_9008

For 32-bit Windows OS open Allx86 & double click on dpinst32.exe to start the driver installer (accept all prompts)

For 64-bit Windows OS open Allx64 & double click on dpinst32.exe to start the driver installer (accept all prompts)​

Boot YUREKA to Qualcomm HS-USB QDLoader 9008 mode

Note: This is a forced Download mode which is different from normal mode, so this is a must step !

Step 1] Power off the device/remove the battery and the re-insert after few seconds.

Step 2] Open the back cover, unscrew all the screws for the inner cover. Pry open the inner cover to expose the 6 tap points next to the headset plug.

Step 3] With the battery connected, short the top two tap points on the right side, This is illustrated in the attached image.

Step 4] With the two tap points shorted, plugin the USB cable. The device will enter (9008) QDL mode. If the Qualcomm driver is installed correctly, the device will show up as a serial device.

Flashing YUREKA Hard-brick Recovery files in Qualcomm HS-USB QDLoader 9008 mode

Note: The files needed for low level device recovery are in the YUREKA_Bootloader_Recovery folder, keep the folder in root of any drive (because: there shouldn't be any space in folder location).

Step 1] Open the QFIL tool, if you complete previous steps correctly, it will detect the device as: Qualcomm HS-USB QDLoader 9008 (COMx)

[IMG="QFIL"]http://img.blog.csdn.net/20140722135620755?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvRnlib24=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center[/IMG]

Step 2] In Select Programmer path browser to the folder with those files and select: prog_emmc_firehose_8936.mbn

Step 3] The Select Build section will automatically select the base folder with those files

Step 4] Now click on Load XML

Step 4a] First you will be asked to select the RawProgram file, browse to the folder with those files and select rawprogram0.xml

Step 4b] Next you will be asked to select the Patch file, browse to the folder with those files and select patch0.xml

Step 5] Finally click on “Download” to start the flashing process.

Keep watching the Status log, After flashing is over the following status log will be shown:

PATCH: Partition 0, Sector: 1, Offset 16 Bytes, Size: 4 Bytes, Value: CRC32(1,92)

PATCH: Partition 0, Sector: 0, Offset 16 Bytes, Size: 4 Bytes, Value: 0

PATCH: Partition 0, Sector: 0, Offset 16 Bytes, Size: 4 Bytes, Value: CRC32(NUM_DISK_SECTORS-1.,92)

Total download file size: 52.9502MB

Throughput: 10.59004M/s

Reset Phone

Waiting for reset done...​

Step 6] The device will now boot and get stuck at the YU boot logo! The device will be continuously vibrating

Congratulations the device is now revived!

Step 7] Close the QFIL program, Disconnect the device and remove the battery for few seconds

Step 8] Reinsert the battery and now keeping the VOLUME UP button pressed connect device to PC – this will trigger FASTBOOT mode

Step 9] Now flash Lollipop (64-bit) factory images via fastboot!

Thanks to:

DooMLoRD for the Actual process.

tirta.agung and

XDAReserved