No Command Blue Exclamation Point Resent Doesnt Work With Volume Power Button

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• #1

Hello, I have an unrooted galaxy s9 (G960U1) stuck in a bootloop. An app had froze which required me to shut off my device. I have not been able to access it since. Around 1 in 4 bootloops I will have access for no more then 5 seconds. If I open bixby or camera I see the errors "process system isn't responding" as well as "system UI isn't responding" appear. Also worth mention, when I enter recovery mode, I receive a screen that says "installing system update" which seems to fail, followed by a brief flash of the slanted android logo with a yellow exclamation point with the words "no command". Also if I choose the option "run graphics test" in recovery mode, I will get the same screen which says "installing system update" followed by "error" and "no command" with the slanted android/exclamation point present. It will then say "erasing" with a progress bar which will reach 100%, followed by another progress bar with the slanted android/exclamation present which will fill 1/5th and then fill out fully before returning to the recovery mode screen.

The data on this phone is extremely valuable to me and a factory reset is simply not an option I can consider. I am dealing with some severe health issues which have kept me bedridden for 4 years. I had been meaning to create a backup but never had any sense of urgency as I felt the risk of my device being broken, lost, etc was extremely low given my circumstances. Much of this data pertains to my condition

Im very new to these sorts of things and my brain does not work very well anymore but I will do everything I can. I see options in recovery mode listed "install update from adb" as well as "install update from sd card". I can also access download mode. Would these options be of any use to me?

I have also heard things about TWRP. Would this be an option or must bootloader be unlocked?

I am running on 8.0 oreo. Is there a way to update and would this be helpful?

Is remote control via team viewer or others possible or worth a try?

Can the flash memory be removed and extracted or placed in a new s9? - (Someone looks to have attempted this with another device and succeeded. There also seem to be a few other viable methods mentioned? https://forum.xda-developers.com/showthread.php?t=2154652&page=1).

Mobile data recovery service? (this seems the most promising)

Some of these proposals may sound dumb as I'm still very new to this but I am willing to try anything. Thank you very much

Dec 5, 2011

10,513

2,857

Durham

• #2

Flash the latest U1 firmware with ODIN 3.13.1 and use HOME_CSC not CSC to retain data

• #3

Flash the latest U1 firmware with ODIN 3.13.1 and use HOME_CSC not CSC to retain data

Wow don't know how I missed this. I came across odin previously but quickly dismissed it as the impression I got was that data loss was inevitable flashing firmware. Apparently not

Ive looked through multiple guides and see many of them look to be leaving out certain files. Is there any added risk in using HOME_CSC, BL, and CP than just AP alone? Is using AP alone even an option for me?

Also, I remember my internal storage being nearly brimmed before the bootlooping begun. The firmware file looks to be about 4gb which I know I don't have. Is this a problem?

Thanks

Dec 5, 2011

10,513

2,857

Durham

• #4

Wow don't know how I missed this. I came across odin previously but quickly dismissed it as the impression I got was that data loss was inevitable flashing firmware. Apparently not

Ive looked through multiple guides and see many of them look to be leaving out certain files. Is there any added risk in using HOME_CSC, BL, and CP than just AP alone? Is using AP alone even an option for me?

Also, I remember my internal storage being nearly brimmed before the bootlooping begun. The firmware file looks to be about 4gb which I know I don't have. Is this a problem?

Thanks

Leave Odin on default settings, (Dont change anything), flash AP, BL, CP and HOME_CSC together

The firmware will just replace the broken one already installed, no extra storage needed

• #5

Leave Odin on default settings, (Dont change anything), flash AP, BL, CP and HOME_CSC together

The firmware will just replace the broken one already installed, no extra storage needed

I managed to successfully flash the latest firmware but unfortunately my device is still bootlooping. The nature of the bootlooping although is very different. Now it will remain on the samsung logo wirh the blue light much longer than previously. Eventually the blue light will disappear and I will see a "phone is starting" box pop up and will begin optimizing my apps. Afterwards the screen will just go black. If don't interfere I'll later get a recovery mode screen with the message "Your phone could not start normally. Some configuration data may be corrupt. Follow the instructions below" which will then give me the option to retry, erase app data, or suggest taking my device to a service provider if I do not wish to erase data. Unfortunately the majority of my valuable data is app data

Im still able to access download mode and the weird errors I was getting before in recovery mode seem to have gone away. I've messed with a few things in recovery mode as well as cleared cache to no avail. Is there anything I can do from here?

Dec 5, 2011

10,513

2,857

Durham

• #6

I managed to successfully flash the latest firmware but unfortunately my device is still bootlooping. The nature of the bootlooping although is very different. Now it will remain on the samsung logo wirh the blue light much longer than previously. Eventually the blue light will disappear and I will see a "phone is starting" box pop up and will begin optimizing my apps. Afterwards the screen will just go black. If don't interfere I'll later get a recovery mode screen with the message "Your phone could not start normally. Some configuration data may be corrupt. Follow the instructions below" which will then give me the option to retry, erase app data, or suggest taking my device to a service provider if I do not wish to erase data. Unfortunately the majority of my valuable data is app data

Im still able to access download mode and the weird errors I was getting before in recovery mode seem to have gone away. I've messed with a few things in recovery mode as well as cleared cache to no avail. Is there anything I can do from here?

Try making a backup with Samsung Smart switch, then reset the phone, once it is booting and working properly, try restoring the backup, but chances are if it's telling you the problem is app data, it's corrupted anyway and you've already lost it

Important data such as media can be copied manually via USB > PC first

Which "app data" is important?

Texts and such will backup with Smart Switch

• #7

Try making a backup with Samsung Smart switch, then reset the phone, once it is booting and working properly, try restoring the backup, but chances are if it's telling you the problem is app data, it's corrupted anyway and you've already lost it

Important data such as media can be copied manually via USB > PC first

Which "app data" is important?

Texts and such will backup with Smart Switch

The exact message regarding the app data is this

"2. Erase app data
Deleting app configuration data may allow your phone to start in safe mode. Safe mode allows access to basic functions, so you can back up any important data stored on your phone. After backing up your data, a factory reset may be needed to get your phone to start normally"

I have many concerns but the app data i'm most concerned with are my notes and book writing progress which I have stored in non system apps

As for media being copied you mean this in the context of a successful smartswitch backup correct? Or in the current state of my device?

Is flashing again worth a try? Heres some additional info I left out that may be helpful. I used Samfirm v0.3.6 to download latest 9.0 firmware for SM-G960U1, with CSC code XAA. Also used Odin 3.13.1. Maybe try downloading the firmware from a different source or try different versions?

I found this link (https://forum.xda-developers.com/galaxy-s8/help/stuck-bootloop-flashing-aqg5-fix-t3636857) which looks to have resolved a post-odin bootlooping problem with the S8. Would I be able to do something similar?

I also found this (https://www.google.com/amp/s/forum....id/software/patched-odin-3-13-1-t3762572/amp/) updated patched odin which looks to replicate the popular prince comsy version. Would this be useful?

Thanks

Dec 5, 2011

10,513

2,857

Durham

• #8

The exact message regarding the app data is this

"2. Erase app data
Deleting app configuration data may allow your phone to start in safe mode. Safe mode allows access to basic functions, so you can back up any important data stored on your phone. After backing up your data, a factory reset may be needed to get your phone to start normally"

I have many concerns but the app data i'm most concerned with are my notes and book writing progress which I have stored in non system apps

As for media being copied you mean this in the context of a successful smartswitch backup correct? Or in the current state of my device?

Is flashing again worth a try? Heres some additional info I left out that may be helpful. I used Samfirm v0.3.6 to download latest 9.0 firmware for SM-G960U1, with CSC code XAA. Also used Odin 3.13.1. Maybe try downloading the firmware from a different source or try different versions?

I found this link (https://forum.xda-developers.com/galaxy-s8/help/stuck-bootloop-flashing-aqg5-fix-t3636857) which looks to have resolved a post-odin bootlooping problem with the S8. Would I be able to do something similar?

I also found this (https://www.google.com/amp/s/forum....id/software/patched-odin-3-13-1-t3762572/amp/) updated patched odin which looks to replicate the popular prince comsy version. Would this be useful?

Thanks

Have you not tried safemode yet to remove the faulty app(s)?

To boot your S9 or S9+ into Safe mode, start by pressing and holding the power button until the power menu appears on your screen. From there, long press the "Power Off" button until it turns into a "Safe Mode" button. Simply tap on "Safe Mode" once it appears and your device will automatically reboot to safe mode.

• #9

Have you not tried safemode yet to remove the faulty app(s)?

To boot your S9 or S9+ into Safe mode, start by pressing and holding the power button until the power menu appears on your screen. From there, long press the "Power Off" button until it turns into a "Safe Mode" button. Simply tap on "Safe Mode" once it appears and your device will automatically reboot to safe mode.

I have tried this but unfortunately it seems i'm unable to access my device to the degree where that would be possible. The screen that pops up with the app data message is in the recovery mode interface. Meaning volume up/down to move, power to select, etc. Ive tried accessing safe mode with the power/volume down method as well with no success

I was able to use the method you're describing before flashing firmware however, also with no luck

Dec 5, 2011

10,513

2,857

Durham

• #10

Sounds to me like the partition is corrupted which will require re-flashing with Odin but using CSC to force the partitions to be re-written and phone reset

Without being able to get back into Android your options are limited

Try flashing with HOME_CSC as many times as you like, unlikely to help but try older firmware (But make sure it's still Pie or Oreo, you cannot downgrade from Pie to Oreo without resetting and expect the phone to work properly)

Other than that, remember to make regular backups next time and reset the phone

• #11

Sounds to me like the partition is corrupted which will require re-flashing with Odin but using CSC to force the partitions to be re-written and phone reset

Without being able to get back into Android your options are limited

Try flashing with HOME_CSC as many times as you like, unlikely to help but try older firmware (But make sure it's still Pie or Oreo, you cannot downgrade from Pie to Oreo without resetting and expect the phone to work properly)

Other than that, remember to make regular backups next time and reset the phone

Oh man this doesn't sound good

For this should I just focus on flashing HOME_CSC or should I mess around with the others as well? Also, if i'm downloading the same firmware with the same product code and everything does it necessarily matter where I'm getting it from or is it all the same?

Do you think I should prioritize trying the same firmware with different product codes or older firmware as you mentioned(but still pie/oreo)?

As for the functionality problems downgrading to Oreo, will the amount of function I receive(If I'm lucky enough for this to work) be enough to back up?

Thanks

Dec 5, 2011

10,513

2,857

Durham

• #12

Oh man this doesn't sound good

For this should I just focus on flashing HOME_CSC or should I mess around with the others as well? Also, if i'm downloading the same firmware with the same product code and everything does it necessarily matter where I'm getting it from or is it all the same?

Do you think I should prioritize trying the same firmware with different product codes or older firmware as you mentioned(but still pie/oreo)?

As for the functionality problems downgrading to Oreo, will the amount of function I receive(If I'm lucky enough for this to work) be enough to back up?

Thanks

If you flash from Pie to Oreo without resetting, the phone will crash more than it already is, if it boots at all, the apps are not backwards compatible, you could end up worse off

Different product/region codes will make no difference

Don't just flash HOME_CSC, always flash all 4 sections at once, I meant you can keep flashing the firmware as many times as you like using HOME_CSC rather than CSC

All firmwares will be the same regardless of where you obtain them, only the build number / date of firmware makes any difference, and even then most of them are just different security updates

The problem is not with the firmware from the sounds of it, it is from your DATA partiton, which does not get touched when you flash unless you flash with CSC, so every flash will likely result in the exact same outcome

Firmware is fine - data partition is corrupted, only likely solution is factory reset I'm afraid, and if that doesn't fix it, there could be a hardware problem with the NAND (storage chip)

AP - System partition
CP - Modem partition
BL - Bootloader partition
CSC - Country Specific Code with repartition
HOME_CSC - Country Specific Code without repartition

DATA partition is not part of the flashing process unless you flash with CSC in which case it will be erased as part of the repartitioning process

Your problem appears to be the DATA partition, so you can see your issue now with the above firmware information

• #13

@*Detection* @NewguyS9 I'm very uneducated in all the stuff said in this thread but I have the exact same issue going on, and don't want to factory reset my phone as I have pictures and videos I don't want deleted. Was there ever a fix? If so, what can I do to fix it?

Similar threads

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Source: https://forum.xda-developers.com/t/please-help-me-recover-my-s9-data.3906308/

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