Right... I spent the last 6 hours reading through the forum and Googling about this problem. I learnt a lot (!), but cannot solve the problem, and I now hope someone can help me
Sorry for the lenghty post, but there's a lot of information to share...
Yesterday, my long-awaited Nexus 7 (8Gb) finally arrived. It worked just fine for an hour or so: I got online without any issue, Calendar, Photos, GMail and Contacts were nicely synching and I was really starting to get impressed about the speed and features.
I did download a couple apps, more specifically Aldiko & Moon+ Reader ebook reader apps, and Facebook).
Suddenly --I believe I just started the Facebook app-- the screen turned black and showed strange stripes. The device rebooted and got stuck on the black screen with the white "Google" text. I let it sit there for a while and then instinctively tried to power-off the device by holding the power button for 10 seconds or so. It did indeed reboot, but when the tablet booted up, it popped back to the black Google screen and just sat there.
FYI: The USB cable was connected all of the time, and the first time I plugged the Nexus in, my Win 7 64bit machine recognized the tablet and loaded the drivers for it.
When it got stuck, I decided to continue charging it, thinking that maybe the battery wasn't fully charged and the cause of the problem. I hooked it up to the official charger in a wall socket and let it sit there for a while, while I started searching the web for a solution. After about 30 minutes, when I had read about the power+volume button combination, I tried this combination (until then the Google page showed for more than 30 minutes). The Nexus indeed showed the Fastboot screen, and I had to plug it back in the PC's USB to get the buttons "start", "recovery mode", "power off" and "restart bootloader" working. None of them had any effect.
The fastboot screen showed the product name "grouper", the lock state as "locked"; the bootloader as version 3.34 and the HW version as ER3.
I downloaded the "Nexus root toolkit" from WugFresh and tried to flash it back to "stock" with Android 4.1.1 JRO03D. The tool did show my serial number, btw.... Until then, I had good hopes, but then it went wrong: the tool downloaded the files, unpacked them and said something about "wiping flash" and everything froze. After about 20 minutes, I concluded it had locked-up and unplugged the device.
It now seems to be completely "bricked"...
I can no longer get to the fastboot screen; Not even with the 3-button trick... it always shows the Google screen and immediately shows the "dead robot" screen with the exclamation mark.
The Nexus does not start up Android, so I cannot activate ADB/ USB debugging...
The device is no longer recognized by my PC; the PC doesn't make the "USB hooked up/disconnected" sound anymore
I tried uninstalling the drivers and installed the "naked drivers", no solution -- they show up with yellow exclamation marks
I installed the SDK, and "fastboot.exe devices" shows nothing
I downloaded the "Nexus 7 Toolkit 2.0"; I cannot access the tablet, no serials show, drivers cannot be installed
FYI: I did not try to root it or unlock it. I rebooted my PC, I power-cycled the Nexus, I changed USB ports, sigh...
I'm afraid I actually bricked my device... If so indeed, and given the fact that I cannot access the device with any of the tools/toolkits, is there anything I can do to put it back to factory settings?
Someone else may chime in with some help, but I think using the toolkit screwed you. Had you just used fastboot while you had the bootloader up you could have reflashed the stock rom yourself using the file from here and these commands.. but since you can't get into the bootloader now I think its hosed, but I could be wrong though.
I just noticed that when I press the power + volume up button, my PC detects it as an "Asus Transformer Prime APX Interface"?
Would this be another "way in"? (found something about NVflash on Google?)
Here are two threads on the topic, however I don't think they restore it that way since mostly its done thru the bootloader
http://forum.xda-developers.com/showthread.php?t=1879228
http://forum.xda-developers.com/showthread.php?t=1882753
and people still continue to use toolkits because its easier. in reality its just easier to mess upon your device. reading through the forums i have yet to see someone that messed up their device with fastboot oem unlock amd fastboot flash recovery recovery.img.
To be honest; I feel the toolkits are great for people that know what they're doing and understand the process and are just looking for a quick way to do it.
People that are new to the rooting scene and don't understand the process are the people that SHOULDN'T be using these toolkits. They need to learn about the process and do it a few times manually before even attempting the toolkits.
OK guys, I got the message and yep, shouldn't have used the toolkit. **guilty** :cyclops:
But what advise do you guys have? Would the APX/NVFlash path make sense?
Or can you advise how to get support from Google/Asus in Belgium (bought tablet in Staples US )
thanks!
Considering it doesn't seem anyone has used NVFlash to restore it looks like you are going to have to return/exchange/RMA whatever option is available to you, unless its figured out
i see you pressing volume up and down and power button to get into the bootloader.. but thats wrong. its power button + volume down to get into the bootloader(maybe thatll make a difference for you). but yea, chances are that youll need to go for an exchange/repair.
Nvflash should work though. I haven't used it since.my last tablet and.unfortunately I forget how to use it. I don't think zip files can be used. I think someone could help him that knows how to set up a folder of files for nvflash.
simms22 said:
i see you pressing volume up and down and power button to get into the bootloader.. but thats wrong. its power button + volume down to get into the bootloader(maybe thatll make a difference for you). but yea, chances are that youll need to go for an exchange/repair.
Click to expand...
Click to collapse
hi, the combination did the job before, but just to be sure, I have tried them all:
power + vol up + vol down: black Google screen, followed by the dead robot with exclamation mark sign...
power + vol down: black Google screen, followed by the dead robot with exclamation mark sign...
power + vol up: Goes into APX mode (and PC chimes)
bigooze said:
hi, the combination did the job before, but just to be sure, I have tried them all:
power + vol up + vol down: black Google screen, followed by the dead robot with exclamation mark sign...
power + vol down: black Google screen, followed by the dead robot with exclamation mark sign...
power + vol up: Goes into APX mode (and PC chimes)
Click to expand...
Click to collapse
robot with an exclamation is the stock recovery. it wants to be flashed with the stock google image https://developers.google.com/android/nexus/images#nakasi
simms22 said:
robot with an exclamation is the stock recovery. it wants to be flashed with the stock google .img
Click to expand...
Click to collapse
Hmm... And how would one do this? What tool should be used?
bigooze said:
Hmm... And how would one do this? What tool should be used?
Click to expand...
Click to collapse
read the page and links provided there, the instructions are there.
simms22 said:
read the page and links provided there, the instructions are there.
Click to expand...
Click to collapse
Dont think you can flash those files thru recovery, I already posted that link for him unfortunately without the bootloader I think hes hosed
In order to use these files, you need to have the fastboot tool in your PATH. That tool is compiled as part of every configuration of the Android Open-Source Project and is the tool used to flash custom builds on your device. On GNU/Linux systems, this also implies that you have configured USB access as mentioned in the machine setup instructions.
Your device needs to be in fastboot mode, with the bootloader unlocked. The relevant key combinations and commands are documented on the page about building for devices.
Click to expand...
Click to collapse
When the android with the red mark comes up, press power+vol up, does the recovery come up?
simms22 said:
read the page and links provided there, the instructions are there.
Click to expand...
Click to collapse
Oops... getting late here -- didn't notice the link...
Anyway, the instructions indicate the use of the fastboot tool, which do not work :crying:
Related
I really need help if anyone can help out.
I followed guide at http://forum.xda-developers.com/showthread.php?t=1622425
to the T with no errors all looked good until it got hung for 3.5 hrs on this message
Flashing Recovery (SOS) stage one - formatting partition..
I try cmd and adb to see if i can see my devices still listed and it was not. I waited a bit more. than reboot the tablet and to my bad luck only the power button light up. nothing on the screen, even tried to do rest via the reset button, no go, held down the vol button with the power still not luck.
Anyone have a fix for this ??????
Rob
rdukes said:
I really need help if anyone can help out.
I followed guide at http://forum.xda-developers.com/showthread.php?t=1622425
to the T with no errors all looked good until it got hung for 3.5 hrs on this message
Flashing Recovery (SOS) stage one - formatting partition..
I try cmd and adb to see if i can see my devices still listed and it was not. I waited a bit more. than reboot the tablet and to my bad luck only the power button light up. nothing on the screen, even tried to do rest via the reset button, no go, held down the vol button with the power still not luck.
Anyone have a fix for this ??????
Rob
Click to expand...
Click to collapse
If your light is on, and the display is black, you are probably stuck in APX mode. Long press the power button and it should go off.
I would also plug into a charger if I were you, before doing anything else.
You will probably need to NVFlash the bootloader and recovery. If it didn't work well the first time, then you should probably be checking drivers. With the tablet in APX mode (hold pinhole button, press and hold PWR, count to 3 seconds, release PWR, then 1 more second and release pin hole.). Tablet should have black display with lit pwr button.
Plug into USB, and make sure windows recognizes it as a Recovery Device. If not, load the right drivers (I use Google USB Android drivers). Might have to load them manually.
Now, I know you wrote down your UID number somewhere, as you will need it.
I uploaded an old ver3 NVFlash package;
http://www.4shared.com/zip/Lgp9DhiH/NVFLASH_Blackthund3r_3bootload.html
Open a CMD window in the directory you extracted, and type run_all
Make sure you get your tab in APX mode, and windows recognizes it. Then follow the prompts. At the end, if good, it should say "Pass"
It doesn't require USB Debugging. If you can get into APX mode, it may work for you. If not, you might post in the bootloader threads.
Link to converting your UID to SBK is found in the guide you posted earlier.
Good Luck!
MD
download at the top afterota and there should be a get out of apx mode, but in apx mode you hold down the power and the light will go of then you hold it again and it will boot
AFTEROTAhttp://forum.xda-developers.com/showthread.php?t=1675939
Moscow Desire said:
If your light is on, and the display is black, you are probably stuck in APX mode. Long press the power button and it should go off.
I would also plug into a charger if I were you, before doing anything else.
You will probably need to NVFlash the bootloader and recovery. If it didn't work well the first time, then you should probably be checking drivers. With the tablet in APX mode (hold pinhole button, press and hold PWR, count to 3 seconds, release PWR, then 1 more second and release pin hole.). Tablet should have black display with lit pwr button.
Plug into USB, and make sure windows recognizes it as a Recovery Device. If not, load the right drivers (I use Google USB Android drivers). Might have to load them manually.
Now, I know you wrote down your UID number somewhere, as you will need it.
I uploaded an old ver3 NVFlash package;
http://www.4shared.com/zip/Lgp9DhiH/NVFLASH_Blackthund3r_3bootload.html
Open a CMD window in the directory you extracted, and type run_all
Make sure you get your tab in APX mode, and windows recognizes it. Then follow the prompts. At the end, if good, it should say "Pass"
It doesn't require USB Debugging. If you can get into APX mode, it may work for you. If not, you might post in the bootloader threads.
Link to converting your UID to SBK is found in the guide you posted earlier.
Good Luck!
MD
Click to expand...
Click to collapse
Hey MD,
I didn't get that file from you still, but i got my tablet to shwo the logo and the white text again by running the a500apflashtool\nvflash.exe but still not luck with passing Flashing Bootloader (EBT) stage one - formatting partition...
I would love to get more info on how to get pass this.
Robert
rdukes said:
Hey MD,
I didn't get that file from you still, but i got my tablet to shwo the logo and the white text again by running the a500apflashtool\nvflash.exe but still not luck with passing Flashing Bootloader (EBT) stage one - formatting partition...
I would love to get more info on how to get pass this.
Robert
Click to expand...
Click to collapse
IF yr recovery drivers have loaded when you are in apx and yr cpuid is correct
then u may have a tab that has issues with the "bct"... the devs are working on a fix for this....
most of us with this issue rolled back to HC using timmydeans EUU then reflashed the bootloader from there with no probs...go figure???
EDIT: the EUU is for a500 you will not have 3g but its just to get back to HC with - when it comes to flashing the bootloader again be sure to
flash yr chosen ics rom first...
as far as more info take a look at civs b/l or F/R extreme rom threads (last 5-6 pages) - the flash itself should take no more than a minute
or two, i use nvflash as it provides a bit of feedback to you if things aren't quite right
you will need td's EUU link in my sig
and jazzyjames tutorial on how to rollback to HC
you will lose ALL your data not only b/c the EUU wipes it but also
ics system apps dont take kindly to being dragged back to HC so make sure you do a full wipe and format any chance you can
for running a glitch-free ICS
rdukes said:
Hey MD,
I didn't get that file from you still, but i got my tablet to shwo the logo and the white text again by running the a500apflashtool\nvflash.exe but still not luck with passing Flashing Bootloader (EBT) stage one - formatting partition...
I would love to get more info on how to get pass this.
Robert
Click to expand...
Click to collapse
Heck, I e-mailed it to you also earlier.
Well, Dibb's is pretty good on this stuff, so I'll pass it to him. Try his steps. He's pretty good on unbricks also.
For me, it's a bit late. Work tomorrow mate.
Also, make sure you are using a good USB cable. You can't always use phone cables. The newer HTC USB cables work for me. This has been known to make things go wonky.
MD
Hey all, requesting some assistance...
I had used the nexus 7 toolkit to unlock the bootloader and root my tablet.
Earlier this afternoon, I decided to cave and flash cm10 on my tablet. Before doing so, instructions stated to wipe. In my ignorance, I wiped one too many things and also wiped the internal memory.
As a result, I am unable to get my tablet to fastboot and when I searched for the .zip to flash, I was presented with an ominously empty file directory to my sdcard's root. I have tried various things with the nexus 7 toolkit and have been unsuccessful in my endeavors, as many of those functions require the tablet to be in fastboot mode before any of them will work.
The device is stuck on the Google screen, and if I push the volume buttons with the power button, it will flicker and eventually return to this screen.
I do have a nandroid backup stored on my machine, but I am unable to use it as I am unable to even boot to the recovery (because I can't get to fastboot)... Any suggestions? I really hope I didn't brick this...
I believe you can get to fastboot mode with the v4.13 bootloader from any other mode so long as the battery is not dead and the screen is working.
When the battery has a good charge, hold the power button down until the google logo appears (could be up to 15-18 seconds). At that very moment that the black-and-white google logo image appears, press the Vol-down button.
Voila. Fastboot.
You do need to see that screen appear though; maybe that's the rub. Note that the timing is important - you only get one second or two to do this immediately after the image first appears.
As a bonus, glance at the bottom of that image. Shows an unlocked padlock for an unlocked bootloader, nothing if locked.
It worked! Thanks a bunch!
qwertyx7 said:
It worked! Thanks a bunch!
Click to expand...
Click to collapse
No worries. Glad it worked. Actually, I only stumbled across a reference to that button sequence a couple days ago.
If you see someone else reporting that they "can't get to fastboot", let them know - you can get there from ANY MODE.
[REF] Nexus 7 Button Combinations
Don't be this guy...
I have installed 4.2.2 on nexus 7. As I had skipped account login at welcome screen, i could not login the account. I altered the apk of login. After factory reset my device has hanged on setup on welcome screen. I tried installing custom rom through stock bootloader but the bootloader says installation failed. How do I solve thia problem guys???
subin.nexus7 said:
don't know the exact steps, but i got it out of the APX mode and into the bootloader.
1. Tablet plugged into computer.
2. Held Volume Down + Volume Up + Power (simultatenously) for three seconds
3. And then released all, and pressed Power again.
4. Tablet booted into bootloader.
I thought that unlocking the bootloader ALWAYS voided the warranty, but in anycase I flashed reflashed ALL stock and locked the bootloader. Will be sending it to ASUS now. Thanks again!
EDIT:
So I wanted to verify that it was a CPU problem, and I downloaded StabilityTest again and ran the CPU load test. It crashed within two minutes, and went into AXP mode again. To get it out of AXP mode, the correct instructions:
1. Plug in the usb into computer
2. Hold Volume Down + Volume Up + Power simultaneously for like 15 seconds
3. The bootloader should show up.
4. If it doesn't, unplug the usb cable, and plug it back in and then repeat the these procedures.
Click to expand...
Click to collapse
Very helpful! I don't have a problem but I've read about others stuck in APX mode. This should be pinned if it works for those stuck in APX. Maybe you should change the thread title to something about APX solution so it draws some attention.
kieso said:
Very helpful! I don't have a problem but I've read about others stuck in APX mode. This should be pinned if it works for those stuck in APX. Maybe you should change the thread title to something about APX solution so it draws some attention.
Click to expand...
Click to collapse
Well... being stuck in APX doesn't necessarily mean your hardbricked. (Corrupt or erased bootloader).
But being hardbricked DOES mean your device will default to APX mode.
To use a mathematical metaphor, one is a SUBSET of the other.
-------
bftb0 has posted an exhaustive list of Nexus 7 button press combos here...
http://forum.xda-developers.com/showthread.php?t=2133986
... which includes how to pro-actively get into APX mode... although until somebody figures how to nvFlash the N7, APX is sort of redundant.
Rgrds,
Ged.
Delete
subin.nexus7 said:
I have installed 4.2.2 on nexus 7. As I had skipped account login at welcome screen, i could not login the account. I altered the apk of login. After factory reset my device has hanged on setup on welcome screen. I tried installing custom rom through stock bootloader but the bootloader says installation failed. How do I solve thia problem guys???
Click to expand...
Click to collapse
I'm sort of confused about the relationship between your edited post and what (apparently ?) kieso quoted, but I'll throw out a few suggestions:
1) AFAIK, there is no way to flash a dev ROM using fastboot (only the boot image of a dev ROM can be flashed this way). You said "bootloader", not "custom recovery" ... so that implies using fastboot. If that is not the case, then your use of terminology is not correct. (It's a computer - reporting details correctly is incredibly important).
2) If you bypass the WiFi login, an account can be added at any time later using the settings menu or simply by launching the Google Play (market) app - there is no need to "alter the apk of login", whatever that means.
3) I would recommend at this point that you start completely over by flashing a factory ROM using fastboot - see the sticky thread about returning to stock using fastboot. If you already have the 4.18 bootloader installed, I recommend you avoid like the plague any operation involving flashing the bootloader.
4) It should be obvious from the trouble that you got yourself into that you should learn what nandroid backups are and that you START USING THEM. The first thing you do after rooting is "make a backup", not "flash a ROM"
good luck
Thanq so much.But still some clarification needed
Now What do I do? My nexus 7 can't pass through at welcome screen saying saying unfortunately setup wizard has stopped. and in recovery{i have no custom recovery, I use bootloader 4.18} i cant flash any rom. I just want to start device any how.. any way.. Is there any way??
subin.nexus7 said:
Now What do I do? My nexus 7 can't pass through at welcome screen saying saying unfortunately setup wizard has stopped. and in recovery{i have no custom recovery, I use bootloader 4.18} i cant flash any rom. I just want to start device any how.. any way.. Is there any way??
Click to expand...
Click to collapse
I guess I am having trouble understanding the sum total of information you have provided - I guess you have omitted some information or mis-stated something. No custom recovery sort of implies a full stock device, but yet you previously mentioned modifying/changing an .apk in /system... normally that would be possible only with a rooted ROM or a custom recovery to do that.
If your tablet is 100% stock, a factory reset of the tablet should allow you to boot once again - at the cost of deleting everything you put on the device, including all files you put on the (pseudo-) SD card.
If that is the case:
- press and hold power+vol-down until the bootloader screen shows up
- use vol-up/vol-down to select "start recovery" and press the power button
- an android lying on it's back should show up; this is the stock recovery splash screen, so
- press power+vol-up simultaneously for about one second - the stock recovery menu should show up
- select factory reset (with vol-up/vol-down) and press the power button.
good luck
bftb0 said:
I guess I am having trouble understanding the sum total of information you have provided - I guess you have omitted some information or mis-stated something. No custom recovery sort of implies a full stock device, but yet you previously mentioned modifying/changing an .apk in /system... normally that would be possible only with a rooted ROM or a custom recovery to do that.
If your tablet is 100% stock, a factory reset of the tablet should allow you to boot once again - at the cost of deleting everything you put on the device, including all files you put on the (pseudo-) SD card.
If that is the case:
- press and hold power+vol-down until the bootloader screen shows up
- use vol-up/vol-down to select "start recovery" and press the power button
- an android lying on it's back should show up; this is the stock recovery splash screen, so
- press power+vol-up simultaneously for about one second - the stock recovery menu should show up
- select factory reset (with vol-up/vol-down) and press the power button.
good luck
Click to expand...
Click to collapse
when you say at the cost of deleting everything, does this include deleting everything in the bootloader because thats what I did when I used the command "fastboot erase bootloader"
I was trying to do the 4.2.2 upgrade via CWM 10.1 Everything seemed to be working ok but that the radio was working and could not connect with AT&T. Tried to go back to 4.1.2 with Nesux Root Toolkit. Now it will just sit there at the Google screen. I can't get into the bootloader at all. When I use fasttboot devices there is not list. Looking in device manager nothing is there. I've d/l'ed and re-installed the windows (7) drivers, re-installed Java as well as the SDK.
The only way I can get it to shut off is to hold all three buttons down. Not really sure where to go from here. I'd be happy to just get it back to stock.
UPDATE: I've not been about to get into it no matter what I've tried. I've held down VOL+DN Power for over 10 min. Nothing. VOL+UP gives me a black screen. I've tried different usb cable and different ports. Now, having it plugged into the computer and doing VOL+DN I hear it make a sound after about 30 seconds going up like da-TA than right back down like TA-da.
Not really sure what else to do at this point. I have no problem with opening it up at this point.
I've re-installed the win 7 drivers, system still will not see the N7. Should I just throw myself on the mercy of Google and send it in for repair/replace? What will they do and what will it end up costing me? I would just buy a new one, but I keep hearing that the second Gen is coming out in just a month...
aklesh3 said:
I was trying to do the 4.2.2 upgrade via CWM 10.1 Everything seemed to be working ok but that the radio was working and could not connect with AT&T. Tried to go back to 4.1.2 with Nesux Root Toolkit. Now it will just sit there at the Google screen. I can't get into the bootloader at all. When I use fasttboot devices there is not list. Looking in device manager nothing is there. I've d/l'ed and re-installed the windows (7) drivers, re-installed Java as well as the SDK.
The only way I can get it to shut off is to hold all three buttons down. Not really sure where to go from here. I'd be happy to just get it back to stock.
Click to expand...
Click to collapse
Hi, aklesh3...
The Google Logo (white text on a black background, with an unlocked padlock symbol if unlocked) IS the bootloader.. as is the white battery charging animation whilst charging.
You're just not in FASTBOOT mode....
From a fully powered down state... press and hold VOL DOWN, whist holding press the POWER button. Your device should now boot into the bootloader in FASTBOOT mode.
If you can't get shut the device down (eg. it's wedged/bootlooping), press AND hold both VOL DOWN and the POWER button for a good 30 seconds or more... the device should boot into the bootloader in FASTBOOT mode.
From here...
Code:
fastboot devices
...should yield a serial number indicating you have a FASTBOOT connection. You should now be free to run whatever FASTBOOT commands you like.
----------------------------------
Checkout this list of Nexus 7 button combinations for more specific details on how to break out of a bootloop....
http://forum.xda-developers.com/showthread.php?t=2133986
Rgrds,
Ged.
Nothing.
Thanks for the quick reply. I tried every one of the combos, but nothing. It still just sits at the bootloader screen. fastboot devices shows nothing in the list. What should I try next?
GedBlake said:
Hi, aklesh3...
The Google Logo (white text on a black background, with an unlocked padlock symbol if unlocked) IS the bootloader.. as is the white battery charging animation whilst charging.
You're just not in FASTBOOT mode....
From a fully powered down state... press and hold VOL DOWN, whist holding press the POWER button. Your device should now boot into the bootloader in FASTBOOT mode.
If you can't get shut the device down (eg. it's wedged/bootlooping), press AND hold both VOL DOWN and the POWER button for a good 30 seconds or more... the device should boot into the bootloader in FASTBOOT mode.
From here...
Code:
fastboot devices
...should yield a serial number indicating you have a FASTBOOT connection. You should now be free to run whatever FASTBOOT commands you like.
----------------------------------
Checkout this list of Nexus 7 button combinations for more specific details on how to break out of a bootloop....
http://forum.xda-developers.com/showthread.php?t=2133986
Rgrds,
Ged.
Click to expand...
Click to collapse
Hello everybody,
I hope somebody can help me to save my N7 (2012).
I installed TWRP without problems and after that I tried to flash a custom rom - which, for some reasons, didn't work.
After reboot my Nexus is stuck at Google logo with an opened lock at bottom...
I can't get to fastboot because when I power on while pushing VOL - button it just get stuck at the same logo screen.
If I keep power button pressed for about 10s, it shuts down but after a few seconds it boots again just to get stuck again at the logo screen...
The only way to shut it down completely is to keep VOL+ button pressed while pressing the power button.
My Windows 7 computer won't recognize the N7 at all anymore, but when I shut it down completely (Power & VOL+), windows says "Unknown device".
Is my Nexus still to be saved or I can throw it away?
Thank you in advance for each advice.
Conrad
Conrad-007 said:
Hello everybody,
I hope somebody can help me to save my N7 (2012).
I installed TWRP without problems and after that I tried to flash a custom rom - which, for some reasons, didn't work.
After reboot my Nexus is stuck at Google logo with an opened lock at bottom...
I can't get to fastboot because when I power on while pushing VOL - button it just get stuck at the same logo screen.
If I keep power button pressed for about 10s, it shuts down but after a few seconds it boots again just to get stuck again at the logo screen...
The only way to shut it down completely is to keep VOL+ button pressed while pressing the power button.
My Windows 7 computer won't recognize the N7 at all anymore, but when I shut it down completely (Power & VOL+), windows says "Unknown device".
Is my Nexus still to be saved or I can throw it away?
Thank you in advance for each advice.
Conrad
Click to expand...
Click to collapse
Hi, Conrad-007...
This is very strange - your Nexus 7 is clearly 'bootable' (sort of), with a functioning bootloader, ie., it's not hardbricked... or you wouldn't be seeing the Google logo.
In the distant past, back when I used to experiment with custom kernels on my Nexus 7, it sometimes required the POWER BUTTON+VOL DOWN buttons be pressed and held down for a good 30 seconds or more, to generate the necessary 'interrupt', and force the device into the bootloader.
My first instinct, is to suggest you may possibly have a problem with your VOL DOWN button, and maybe it's stuck somehow or not making contact.
It also occurred to me, that you might be able to access the bootloader with...
Code:
adb reboot bootloader
...or possibly...
Code:
adb reboot fastboot
...and even...
Code:
adb reboot recovery
But unfortunately, I'm pretty sure you need to be running fully booted Android or booted into a custom recovery (eg., TWRP) before you can issue ADB commands. I haven't tinkered around in this area of Android for a couple of years now, so my memory of the specifics is a little hazy.
Anyhow, here's a fairly comprehensive listing of Nexus 7 button presses/interrupts, which maybe of some use...
https://forum.xda-developers.com/showthread.php?p=37606945#post37606945
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Anyway, just some thoughts that might give you some clues/ideas, that may resolve your problem.
Good luck, and I hope you find something that works.
Rgrds,
Ged.
Thanks Ged for the detailed answer.
Unfortunately it seems that my Nexus is not booting complete (not finishing the booting sequence due to corrupted bootloader?) and so I cannot send to it any adb or fastboot command...
I read in the meantime that holding the VOL up button while powering up the Nexus, it will bring it in the APX mode (whatever this mean) and indeed, my computer recognize it as "APX" device.
I hope at least that this is a good sign and a first step to bring my Nexus back to life... but I have no idea what is the APX mode and what can I do in this mode to attempt to save my device...
Do you (or somebody else) have (has) an advice or tutorial for me concerning this?
Regards,
Conrad
Hi Conrad.
I'm in exactly the same situation (I've mistakenly posted a duplicate thread here https://forum.xda-developers.com/nexus-7/general/bricked-tilapia-t4005149). Let's continue here. So:
1. I spent 4 hours trying all possible button press combinations, including VERY long presses. I didn't notice any APX device or Uknown device connected to Windows. I might have missed it, you gave me hope. I will check again.
2. APX mode enables low level access to the chipset via nVidia tool nvflash. You probably came accross these threads here on xda:
https://forum.xda-developers.com/nexus-7/general/tutorial-how-to-unbrick-nexus-7-using-t3342364
https://forum.xda-developers.com/showthread.php?t=2564615
https://forum.xda-developers.com/showthread.php?t=2455927
https://forum.xda-developers.com/showthread.php?t=2340237
I haven't so far, as I was not aware of the visibilty of the tablet in Windows. I will check again.
Well, I must have been blind not to have seen all the posts here on xda and everywhere else. I went through the threads and now I know:
1. I can see the tablet in APX mode in Windows. Possibly I could correctly set up the driver.
2. This would be totally useless, since I hadn't backed up necessary blob.
I have a new paperweight