Phone not turning on after modem flash

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n_alvarez2007

n_alvarez2007

Senior Member
Oct 31, 2012
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I tried downloading files in this post http://xdaforums.com/showthread.php?t=2788357 and attempted to flash both the modem and stock ROM using TWRP. The modem flashed successfully but the ROM failed, so I restored to a Nandroid backup I made on CM M6.

I immediately received a message telling me to insert my SIM card. Thinking this was a weird error, I tried to reboot into Recovery and restore again. Only this time my phone did nothing. It's not turning on when it's off and plugged into a power source, it's not turning on in Download mode, it's not booting into recovery, nothing.

I don't know how to fix this without resorting to a JTAG recovery method and was wondering if anyone might have any ideas on how to help me since I don't feel like taking this thing apart.
 
pre4speed

pre4speed

Senior Member
Apr 17, 2011
2,756
775
lancaster
Samsung Galaxy S22 Ultra
I know this may be a long shot, but I've seen it work numerous times. Have you tried removing the battery and leaving it out for a longer time than a few minutes? Worth a shot while waiting for more pro user answers.
 
audit13

audit13

Inactive Recognized Contributor
Jun 4, 2012
12,911
5,052
Toronto
Do you have access to a USB jig? I'm not sure that it will work in your case but it's cheaper than using a jtag service.
 
Jakeuten

Jakeuten

Senior Member
Dec 8, 2012
225
40
Duluth
mine just bricked for the same reason. same symptoms and everything... ugh

Sent from my XT1028 using XDA Free mobile app
 
L

Larry2999

Senior Member
Feb 7, 2014
363
78
Atlanta, GA
n_alvarez2007 said:
I tried downloading files in this post http://xdaforums.com/showthread.php?t=2788357 and attempted to flash both the modem and stock ROM using TWRP. The modem flashed successfully but the ROM failed, so I restored to a Nandroid backup I made on CM M6.

I immediately received a message telling me to insert my SIM card. Thinking this was a weird error, I tried to reboot into Recovery and restore again. Only this time my phone did nothing. It's not turning on when it's off and plugged into a power source, it's not turning on in Download mode, it's not booting into recovery, nothing.

I don't know how to fix this without resorting to a JTAG recovery method and was wondering if anyone might have any ideas on how to help me since I don't feel like taking this thing apart.
Click to expand...
Click to collapse

The thread posted by Enewman does contain a 4.4. debrick image for the i747. Have you tried writing this image to a (micro) SD card and booting from the card? If this works, you could try firmware restoration after booting from the card. If it doesn't work, then you could try the 4.3 debrick image from the link below. With luck, this could still work since the firmware flashing failed...

http://xdaforums.com/showthread.php?t=2549068
 
Jakeuten

Jakeuten

Senior Member
Dec 8, 2012
225
40
Duluth
Larry2999 said:
The thread posted by Enewman does contain a 4.4. debrick image for the i747. Have you tried writing this image to a (micro) SD card and booting from the card? If this works, you could try firmware restoration after booting from the card. If it doesn't work, then you could try the 4.3 debrick image from the link below. With luck, this could still work since the firmware flashing failed...

http://xdaforums.com/showthread.php?t=2549068
Click to expand...
Click to collapse

how do you get the phone to turn on if it's bricked? sorry in all of my years of using android i've never bricked.

Sent from my XT1028 using XDA Free mobile app
 
BWolf56

BWolf56

Senior Member
Mar 25, 2011
4,111
1,769
Outaouais
Jakeuten said:
how do you get the phone to turn on if it's bricked? sorry in all of my years of using android i've never bricked.

Sent from my XT1028 using XDA Free mobile app
Click to expand...
Click to collapse

If you get a sign of life outta your phone, it's "soft-brick". Otherwise, no sign of life (at all) = "hard-bricked" and a jtag is needed to push the bootloaders back into it.

A jig quite often boots the device in download mode even when people think they hard-bricked (often a miss-interpretation). And if there's a sign of life, it's easily recoverable!

As for turning on while bricked, you need intact bootloaders to boot from.
 
DocHoliday77

DocHoliday77

Senior Member
May 10, 2011
9,403
6,892
HuntsVegas!!!
FYI
Flashing the 4.4.2 modem on 4.3 firmware will hard brick the device. To check for sure, plug into a pc and check in device manager. If it says QHSUSB_DLOAD, you are hard bricked. The debrick.img is posted in enewman's thread, but if you guys need the other firmware files for the 2 sdcard method let me know and ill post them for you.
Ive also posted a script in the debrick thread someone can flash to create a new debrick.img in case the current one doesn't work, and if any I747M users want to be proactive and create one for each of their variants.
 
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BearOnThePhone

New member
Jul 14, 2012
2
1
DocHoliday77 said:
FYI
Flashing the 4.4.2 modem on 4.3 firmware will hard brick the device. To check for sure, plug into a pc and check in device manager. If it says QHSUSB_DLOAD, you are hard bricked. The debrick.img is posted in enewman's thread, but if you guys need the other firmware files for the 2 sdcard method let me know and ill post them for you.
Ive also posted a script in the debrick thread someone can flash to create a new debrick.img in case the current one doesn't work, and if any I747M users want to be proactive and create one for each of their variants.
Click to expand...
Click to collapse

Thanks for your reply. I was able to flash the modem and update from enewman's thread last night and it booted up once but had no cellular so I turned it off and it was hard bricked :(

I have DL'd the debrick file an put it on a 16BG card but it will not boot at all, I have tried many times.

Is there anything else that I can do? / If by some chance I get it into DL mode what would my next step be?

I know that the system is on 4.4.2 since I saw it booted up so I don't want to flash 4.3 on it.

Thanks
 
DocHoliday77

DocHoliday77

Senior Member
May 10, 2011
9,403
6,892
HuntsVegas!!!
Ill be posting more info in the debrick thread shortly. Make sure you check there. Also post there for anything else you need while trying to fix this. That way everything is in one thread and it makes it a lot easier for others to assist you.
 
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    DocHoliday77
    DocHoliday77
    FYI
    Flashing the 4.4.2 modem on 4.3 firmware will hard brick the device. To check for sure, plug into a pc and check in device manager. If it says QHSUSB_DLOAD, you are hard bricked. The debrick.img is posted in enewman's thread, but if you guys need the other firmware files for the 2 sdcard method let me know and ill post them for you.
    Ive also posted a script in the debrick thread someone can flash to create a new debrick.img in case the current one doesn't work, and if any I747M users want to be proactive and create one for each of their variants.
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