[YU Yureka Q&A, Help & Troubleshooting] kapiljagtap:
15:01:17 CELL1: Software Version: Assembly - <V3.98_141222_02>

15:01:17 CELL1: Cell 1 USB address is: 5&26769595&0&8

15:04:30 CELL1: Download Started...

15:04:30 CELL1: Downloading CPB:

15:04:30 CELL1: Init DownQueue...

15:04:30 CELL1: 4.4.035.00.P1.150420.8675_I01_ROM

15:04:30 CELL1: Device connected, start to download ...

15:04:30 CELL1: Get bootloader information ...

15:04:30 CELL1: Bootloader is old !

15:04:30 CELL1: Bootloader will not use CRC while system img!

15:04:30 CELL1: Bootloader supports querying CID!

15:04:30 CELL1: Bootloader supports querying Secure !

15:04:30 CELL1: Check device ...

15:04:30 CELL1: Check CID Pass.

15:04:30 CELL1: Check phone pass !

15:04:30 CELL1: This CPB Support Secure Phone!

15:04:30 CELL1: Check phone fuse hwid, pass!

15:04:30 CELL1: Phone fix pass !

15:04:30 CELL1: Switched device to upgrade mode ...

15:04:30 CELL1: Start to download CPB ...

15:04:30 CELL1: C:\Users\KAPIL\Desktop\Yureka Original\Yu_Yureka_AO5510_V2_15.04.15_lollipop\Firmware\4.4.035.00.P1.150420.8675_I01_ROM.CPB

15:04:30 CELL1: Start to download sbl1.mbn file ...

15:04:30 CELL1: transmit sbl1.mbn file size info OK

15:04:30 CELL1: Transmit sbl1.mbn file Flag code OK

15:04:30 CELL1: Start to download sbl1.mbn file ...

15:04:30 CELL1: transmit sbl1.mbn file size info OK

15:04:30 CELL1: Transmit sbl1.mbn file Flag code OK

15:04:30 CELL1: Start to download tz.mbn file ...

15:04:30 CELL1: transmit tz.mbn file size info OK

15:04:30 CELL1: Transmit tz.mbn file Flag code OK

15:04:30 CELL1: Start to download tz.mbn file ...

15:04:30 CELL1: transmit tz.mbn file size info OK

15:04:31 CELL1: Transmit tz.mbn file Flag code OK

15:04:31 CELL1: Start to download rpm.mbn file ...

15:04:31 CELL1: transmit rpm.mbn file size info OK

15:04:31 CELL1: Transmit rpm.mbn file Flag code OK

15:04:31 CELL1: Start to download rpm.mbn file ...

15:04:31 CELL1: transmit rpm.mbn file size info OK

15:04:31 CELL1: Transmit rpm.mbn file Flag code OK

15:04:31 CELL1: Start to download hyp.mbn file ...

15:04:31 CELL1: transmit hyp.mbn file size info OK

15:04:31 CELL1: Transmit hyp.mbn file Flag code OK

15:04:31 CELL1: Start to download hyp.mbn file ...

15:04:31 CELL1: transmit hyp.mbn file size info OK

15:04:31 CELL1: Transmit hyp.mbn file Flag code OK

15:04:31 CELL1: Start to download emmc_appsboot.mbn file ...

15:04:31 CELL1: transmit emmc_appsboot.mbn file size info OK

15:04:39 CELL1: Transmit emmc_appsboot.mbn file Flag code OK

15:04:39 CELL1: Start to download emmc_appsboot.mbn file ...

15:04:39 CELL1: transmit emmc_appsboot.mbn file size info OK

15:04:45 CELL1: Transmit emmc_appsboot.mbn file Flag code OK

15:04:45 CELL1: Start to download boot.img file ...

15:04:45 CELL1: transmit boot.img file size info OK

15:04:52 CELL1: Transmit boot.img file Flag code OK

15:04:52 CELL1: Start to download recovery.img file ...

15:04:52 CELL1: transmit recovery.img file size info OK

15:05:00 CELL1: Transmit recovery.img file Flag code OK

15:05:00 CELL1: Success to transmit recovery.img,Next...

15:05:00 CELL1: Start to download cache.img file ...

15:05:00 CELL1: transmit cache.img file size info OK

15:05:03 CELL1: Transmit cache.img file Flag code OK

15:05:03 CELL1: Start to download MISC.img file ...

15:05:03 CELL1: transmit MISC.img file size info OK

15:05:03 CELL1: Transmit MISC.img file Flag code OK

15:05:03 CELL1: Start to download DDR.bin file ...

15:05:03 CELL1: transmit DDR.bin file size info OK

15:05:03 CELL1: Transmit DDR.bin file Flag code OK

15:05:03 CELL1: Start to download NON-HLOS.bin file ...

15:05:03 CELL1: transmit NON-HLOS.bin file size info OK

15:05:22 CELL1: Transmit NON-HLOS.bin file Flag code OK

15:05:22 CELL1: Start to download system.img file ...

15:05:22 CELL1: Downloading the 1 packet of system

15:06:05 CELL1: Downloading the 2 packet of system

15:06:42 CELL1: Downloading the 3 packet of system

15:07:10 CELL1: Downloading the 4 packet of system

15:08:05 CELL1: Downloading the 5 packet of system

15:08:53 CELL1: Downloading the 6 packet of system

15:09:11 CELL1: transmit system file data finished,Next...

15:09:11 CELL1: Start to download userdata.img file ...

15:09:11 CELL1: transmit userdata.img file size info OK

15:10:25 CELL1: Transmit userdata.img file Flag code OK

15:10:25 CELL1: Start to download sec.dat file ...

15:10:25 CELL1: transmit sec.dat file size info OK

15:10:25 CELL1: Transmit sec.dat file Flag code OK

15:10:25 CELL1: Quite upgrade mode ...

15:10:30 CELL1: Not found RS232 port.

15:10:30 CELL1: Upgraded. Please remove device manually.

15:10:30 CELL1: Total download time elapsed: 6 min : 0 sec

15:10:30 CELL1: Downloading all files: Successful!

But still the device is not starting..Help Please...