This morning I came down to find my Nexus 7 dead... No response from screen, and I was unable to get it into recovery mode.. I have recently unrooted and relocked the device, flashing it with the JRN84D factory image from the google website and then upgrading to the latest firmware OTA.
I thought the battery may be dead, but it's been on charge for two hours and I am still unable to boot. I decided to plug it in, and lo and behold, I get a response! By virtue of Naked Drivers, my computer now recognises a seemingly dead device as an Asus Transformer Prime in APX mode... No ADB or fastboot response...
What can I do from here? I am reluctant to return it because I am leaving for vacation soon and won't be in the country to accept the order..
Any help would be appreciated..
BTW this is my first android device I have rooted, to I'm fairly new to this..
vaudreyt said:
This morning I came down to find my Nexus 7 dead... No response from screen, and I was unable to get it into recovery mode.. I have recently unrooted and relocked the device, flashing it with the JRN84D factory image from the google website and then upgrading to the latest firmware OTA.
I thought the battery may be dead, but it's been on charge for two hours and I am still unable to boot. I decided to plug it in, and lo and behold, I get a response! By virtue of Naked Drivers, my computer now recognises a seemingly dead device as an Asus Transformer Prime in APX mode... No ADB or fastboot response...
What can I do from here? I am reluctant to return it because I am leaving for vacation soon and won't be in the country to accept the order..
Any help would be appreciated..
BTW this is my first android device I have rooted, to I'm fairly new to this..
Click to expand...
Click to collapse
Bump.... Anyone?
vaudreyt said:
This morning I came down to find my Nexus 7 dead... No response from screen, and I was unable to get it into recovery mode.. I have recently unrooted and relocked the device, flashing it with the JRN84D factory image from the google website and then upgrading to the latest firmware OTA.
I thought the battery may be dead, but it's been on charge for two hours and I am still unable to boot. I decided to plug it in, and lo and behold, I get a response! By virtue of Naked Drivers, my computer now recognises a seemingly dead device as an Asus Transformer Prime in APX mode... No ADB or fastboot response...
What can I do from here? I am reluctant to return it because I am leaving for vacation soon and won't be in the country to accept the order..
Any help would be appreciated..
BTW this is my first android device I have rooted, to I'm fairly new to this..
Click to expand...
Click to collapse
I think that it's just frozen. You need to simulate pulling the battery out, try a long hold on the power button and see does that fix it for you.
Mine is in APX mode too. I was using it last night, rebooted it, and nothing. Screen is dead. It is a 16gb model from Staples and all of them are out of stock to replace it.
Any solution?
APX mode is used for NVFlash. I'm tinkering with NVFlash trying to somehow push stock software or something but I keep getting unknown device error. The device doesn't do anything at all. But if I hold Volume Up and while on a PC, it will ding and install the APX driver... but at this point I am completely lost.
This happened with my LG G2x once and I found a script that repartitioned, reformatted, and flashed over a stock image. I haven't seen any mention of NVFlash with the N7 though.
Unplug it from your computer and press and hold the power button for 10-20 seconds. Then release it and try to turn the tablet back on. It may or may not work. If not plug it into your computer and see if it went back to apx mode. If so, unplug from the computer again and try holding the power button until it turns off again and try booting into the bootloader by pressing volume up, volume down and power all at the same time. If you can get to bootloader, you can either flash back to stock using fastboot or try getting into recovery. If none of this works, call Google and tell them what happened and what it does when you plug it in to your computer and maybe they'll know how to fix it or will replace it.
Sent from my Nexus 7 using xda premium
Yea this is not the same case here. I've bootlooped my N7 before and your method would typically work.
But not this time. The screen doesn't even come on. There is no indication the tablet is on or off except the little ding on the PC when it comes up as APX mode.
So ADB and Fastboot commands are not an option. I already tried that. NVFlash is the only thing close to talking to the tablet and its saying unknown device.
I bought this at staples so I guess my only option is to return it. They don't have 16gb models and it doesn't look like they are getting any for weeks.
I can pick up a 8gb model but I don't want to be stuck with that.
Sent from my Galaxy Nexus using xda premium
I've tried everything...
I've tried everything, but short of NVflash - which I am reluctant to attempt - nothing works.. Seeing as at the time my device decided to go into APX mode my bootloader was locked and I was running stock ROM, I had no choice but to return it to Google, which is surprisingly difficult to do if you live in the UK...
For some reason Google decided to switch to TNT for us brits, and the customer support agent on the phone was particularly clueless as to how you go about returning an item if you are at the disadvantage of not actually living in the states... After many phone calls and much persuasion, I managed to prise out instructions on how to return an item if living in the UK...
However, a piece of information for anyone in the UK who wants to return an item: TNT do not deal with punters directly; they purely deal with businesses, the consequence of that being you as a customer CANNOT book a collection yourself. Instead you must ask Google to arrange it for you, which they will certainly not be able to, seeing as many of their frontline support agents seem not to have been briefed on this...
I ended up having to use Royal Mail...
Just a bit of info for anyone in the same predicament as me..
Did anyone figure out how to get out of APX mode?
My Nexus 7 was intermittently rebooting/freezing so I ran a 'StabilityTest' (CPU + GPU). Within one minute of the stress test the tablet rebooted and went straight into a blank screen. No matter what buttons, the tablet just won't boot. I plugged in the tablet to the computer, and I get the APX driver not found.
I'm past my 15 days to return the tablet to Google, and besides my tablet bootloader is unlocked. Though I never flashed any ROMS/kernels. Does anyone have any recommendations on how to proceed?
Thanks
SimFox3 said:
Did anyone figure out how to get out of APX mode?
My Nexus 7 was intermittently rebooting/freezing so I ran a 'StabilityTest' (CPU + GPU). Within one minute of the stress test the tablet rebooted and went straight into a blank screen. No matter what buttons, the tablet just won't boot. I plugged in the tablet to the computer, and I get the APX driver not found.
I'm past my 15 days to return the tablet to Google, and besides my tablet bootloader is unlocked. Though I never flashed any ROMS/kernels. Does anyone have any recommendations on how to proceed?
Thanks
Click to expand...
Click to collapse
Unlocking the nexus boot loader does not void your warrant. Return it to Asus.
tomb20 said:
Unlocking the nexus boot loader does not void your warrant. Return it to Asus.
Click to expand...
Click to collapse
I 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.
Mine went back to staples. I could never even get the thing to come back on. Perhaps it blew up.
Had my Google Play model now but this one has some screen lifting going on. Nothing major
Sent from my Nexus 7 using xda premium
Bump...
Seems I also deep-bricked my Nexus 7... Any update on restoring it via APX / NVFlash?
Have a look at this thread on apx: http://forum.xda-developers.com/showthread.php?p=31453465
Sent from my Nexus 7
BillGoss said:
Have a look at this thread on apx: http://forum.xda-developers.com/showthread.php?p=31453465
Sent from my Nexus 7
Click to expand...
Click to collapse
I randomly kept pressing the volume / power button for an hour and the tablet came out of APX mode. Make sure the tablet is in APEX mode by plugging it in to the computer--the APX device drivers should install
SimFox3 said:
I 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
You sir, are a savior! I was on vacation in when I woke up to a black screen on my Nexus 7 and nothing I tried work to get it booted. I tried this on a last hope that it would boot and it completely worked. So glad I won't have to deal with talking to Asus or Google to try and get it repaired.
SimFox3 said:
I 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
MAN! You saved me! I'm hard rebooted to stop a CWM backup and got this problem. THANKS!!!
I had the same problem, and SimFox3's advice got me out of APX mode and booted. This appears in my case to be due to some kind of 'deep discharge' problem, where I let the device run down completely, to the point where it would not charge and was completely unresponsive.
After following SimFox3's "3 finger salute" trick, I got into boot, but then the device immediately shut down with 'connect charger' message before I could boot completely. After this I swapped back to the mains charger, and am now getting the charging animation, so fingers cross It will boot up fully after a couple of hours charging.
There seems to be loads of threads about the Nexus 7 and battery "deep discharge" type problems. Anyone seen any official information about this?
I interrupted a sideloading flash (didn't think it started anyway) and am getting this problem.
Tried Sim3fox's solution and still not working.
Any suggestions? It seems like fixes are happening at random.
Thanks
SimFox3 said:
I 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
Thanks a lot. Your instruction was correct!! I made my nexus for a 5 minute.
SimFox3 said:
I 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
Absoulte saviour buddy
Mine went totaly dead even thought it was pluged into wall and I thought it was a goner, this just saved me a head ache from kids
I was running stock rooted Android KK 4.4.4 on Nexus 2012 Wifi Only with bootloader as unlocked. I attempted the Lollypop update 5.0.2 by OTA but it gave an error while installing and device rebooted to Kit Kat normally.....working fine. OTA was not getting done for some reason may be because i was rooted.
I downloaded the factory image nakasi-lrx22g-factory-2291c36b.tgz from google and attempted to flash it using Nexus Root Toolkit(v 2.0.2) with option "No Wipe Mode" as selected and then the device ran into fastboot mode... NRT run commands like erase system etc then the script gave an error "Failed" "remote -invalid state" while attempting to write bootloader. I thought that the problem is with "No Wipe" selected so i re-attempted it with "No Wipe" being unselected. BUt same error.
I searched the forum & found that the issue may be due to incorrect/corrupted bootloader. I replaced the bootloader-grouper-4.23.img which was in the factory image with the 4.23 bootloader taken from JWR66V as most people over XDA have said that its the working bootloader.
I had flashed the img downloaded from here - http://forum.xda-developers.com/showpost.php?p=45043044&postcount=15
Flashing succeeded and Nexus Root Toolkit did not give error this time it said "OKAY" instead of "FAILED". But it did not proceed forward to flashing other files like system img etc. NRT was stuck at the Flash Bootloader - OKAY cmd.
I powered of the Tablet and Powered On again it showed "Booting Failed" at the Google Screen. I rebooted into Fastboot mode with "vol- and power" held together. It displayed the same screen as it did before i.e. displaying the information of Bootloader.
Product Name - Grouper
Variant - Not Defined Yet
HW Version - ER3
Bootloader version - 4.23
Baseband version - NA
Signing - Not Defined Yet
LOCK STATE = UNLOCKED
Then I read somewhere that after flashing the Bootloader img you have to run the bootloader by rebooting tablet with vol+,vol- and power button all held together.
I did that and wat i saw on computer screen was "APX device found" (((((
The device went into APX mode and since 2 days has not come out.
I tried pressing Power button for like 3mins with power adapter connected/disconnected by usb
I tried pressing vol- and power button for more than 5min. with system connected/disconnected with usb
Nothing worked...
I am wondering what took the device to APX because the bootloader was good one from "JWR66V". It was flashed with success by Nexus Root Toolkit. the device did run into fastboot mode once after flashing it. The Device went into APX after all the 3 keys "vol+ vol- and power" were pressed together. But according to key combo terms APX mode is activated when "Power" and "vol+" are pressed and it exits when "Power" alone is held for 15+ seconds.
What I feel now is that the device is in APX looping (similar to Bootlooping) due to some reason. Corrupted Bootloader can be one of that but its unlikely as flashing was successful and img used was authentic. One more reason of APX looping may be that nothing apart from Bootloader is present in it, no system no recovery. only bootloader is present.
Now what do I do to come out of APX ? Power button and Power+vol- etc not working tried them numerous times. It won't accept fastboot or adb commands as its in apx mode.
Its Out of Warranty so only 2 options left for me now
1. Battery Removal
2. NVFlash
I want to keep things simple so I am thinking of battery removal first. Does the battery removal reset nexus 7 ?
I have a feeling that its effect is same as the power button holding for 15sec. but will have to try. Although the Warranty is voided but will Asus people agree to provide paid service to me if i myself attempt battery removal by opening the back side of the device.
Incase this dont work I will move to nvflash
But I have a few questions regarding nvflash.
1. Does nvflash require blob n sbk even for an unlocked bootloader?
2. I can generate the SBK for my device using the CCSN number and try though but I want only a simple command which will reboot nexus into fastboot mode exiting APX mode.
any help will be appreciated.
BrightHeart said:
I was running stock rooted Android KK 4.4.4 on Nexus 2012 Wifi Only with bootloader as unlocked. I attempted the Lollypop update 5.0.2 by OTA but it gave an error while installing and device rebooted to Kit Kat normally.....working fine. OTA was not getting done for some reason may be because i was rooted.
I downloaded the factory image nakasi-lrx22g-factory-2291c36b.tgz from google and attempted to flash it using Nexus Root Toolkit(v 2.0.2) with option "No Wipe Mode" as selected and then the device ran into fastboot mode... NRT run commands like erase system etc then the script gave an error "Failed" "remote -invalid state" while attempting to write bootloader. I thought that the problem is with "No Wipe" selected so i re-attempted it with "No Wipe" being unselected. BUt same error.
I searched the forum & found that the issue may be due to incorrect/corrupted bootloader. I replaced the bootloader-grouper-4.23.img which was in the factory image with the 4.23 bootloader taken from JWR66V as most people over XDA have said that its the working bootloader.
I had flashed the img downloaded from here - http://forum.xda-developers.com/showpost.php?p=45043044&postcount=15
Flashing succeeded and Nexus Root Toolkit did not give error this time it said "OKAY" instead of "FAILED". But it did not proceed forward to flashing other files like system img etc. NRT was stuck at the Flash Bootloader - OKAY cmd.
I powered of the Tablet and Powered On again it showed "Booting Failed" at the Google Screen. I rebooted into Fastboot mode with "vol- and power" held together. It displayed the same screen as it did before i.e. displaying the information of Bootloader.
Product Name - Grouper
Variant - Not Defined Yet
HW Version - ER3
Bootloader version - 4.23
Baseband version - NA
Signing - Not Defined Yet
LOCK STATE = UNLOCKED
Then I read somewhere that after flashing the Bootloader img you have to run the bootloader by rebooting tablet with vol+,vol- and power button all held together.
I did that and wat i saw on computer screen was "APX device found" (((((
The device went into APX mode and since 2 days has not come out.
I tried pressing Power button for like 3mins with power adapter connected/disconnected by usb
I tried pressing vol- and power button for more than 5min. with system connected/disconnected with usb
Nothing worked...
I am wondering what took the device to APX because the bootloader was good one from "JWR66V". It was flashed with success by Nexus Root Toolkit. the device did run into fastboot mode once after flashing it. The Device went into APX after all the 3 keys "vol+ vol- and power" were pressed together. But according to key combo terms APX mode is activated when "Power" and "vol+" are pressed and it exits when "Power" alone is held for 15+ seconds.
What I feel now is that the device is in APX looping (similar to Bootlooping) due to some reason. Corrupted Bootloader can be one of that but its unlikely as flashing was successful and img used was authentic. One more reason of APX looping may be that nothing apart from Bootloader is present in it, no system no recovery. only bootloader is present.
Now what do I do to come out of APX ? Power button and Power+vol- etc not working tried them numerous times. It won't accept fastboot or adb commands as its in apx mode.
Its Out of Warranty so only 2 options left for me now
1. Battery Removal
2. NVFlash
I want to keep things simple so I am thinking of battery removal first. Does the battery removal reset nexus 7 ?
I have a feeling that its effect is same as the power button holding for 15sec. but will have to try. Although the Warranty is voided but will Asus people agree to provide paid service to me if i myself attempt battery removal by opening the back side of the device.
Incase this dont work I will move to nvflash
But I have a few questions regarding nvflash.
1. Does nvflash require blob n sbk even for an unlocked bootloader?
2. I can generate the SBK for my device using the CCSN number and try though but I want only a simple command which will reboot nexus into fastboot mode exiting APX mode.
any help will be appreciated.
Click to expand...
Click to collapse
U have done it in wrong way
U should have flashed the recovery and system and bootloader manually without nrt
Are able to detect your device via computer in fastboot mode
shivambhai said:
U have done it in wrong way
U should have flashed the recovery and system and bootloader manually without nrt
Are able to detect your device via computer in fastboot mode
Click to expand...
Click to collapse
I used NRT normally as its directed in NRT's thread. Bootloader taken from "JWR66V" was flashed successfully but NRT didnot proceed forward. I powered of the tablet then pressed both volume plus & minus buttons along with power button simultaneously, I read somewhere that pressing all 3 butons is needed to start the bootloader, This resulted in device going in APX mode, although APX mode is activated by holding only vol plus and power button simultaneously. The device seems to be looped in APX i.e. not coming out of it.
It was detectable as a fastboot device earlier but after it went into APX its detected as an "Unknown Apx device" asking for driver, The Asus Transformer Pas driver is installable for it, but i doubt will it work in nvflash.
I jus need a little information about battery removal & nvflash. I have googled about them already but had a couple of queries which I have posted above.
Thanxxxx
Update
Okay last night I attempted battery removal from the device. I took off the back panel of nexus 7 and disconnected the battery cable which is connected to motherboard socket. I reconnected it after 10mins and still no success. I removed it again and connected the device to computer by USB and I found something very strange. the computer detected the Nexus 7 as "Unknown APX Device" even after the battery was disconnected. I was wondering from where is the device drawing power to run? Is it by computer's USB port alone or is there any other power source in nexus7's motherboard like a CMOS cell is present in Computer's MotherBoard which keeps the clock ticking.
Whatever may be the case but it seems that APX Mode is capable of running in minimal power input.
Next test which I performed was to Hold the power button while it was connected to system by USB. After about 7-8secs the device powered off as the computer displayed USB device disconnected message and sound but it repowered on its own in next couple of seconds and again it was detected as "APX device" . Same result observed with simultaneous holding of volume minus+power button as well.
Now I have every reason to believe that device is hard bricked and looped in APX i.e. The Bootloader is corrupted or is not running due to some reason. The device has no option but to go in APX and sit there forever unless its flashed at low level.
I would like to give nvflash a try but i know that theres no1 yet who has made it success and then the only option remaining for me is to visit Asus service center and get some paid service done.
Query - If I visit Asus service center then will they perform software reprogramming i.e. Bootloader fixing or will they replace the hardware ? Incase if they replace the hardware then will they replace the whole board or just the memory unit(which contains Bootloader) from the board?
Experts here please put some light on this
No idea brightheart
Did you have any luck with this BrightHeart? I seem to be in the same boat now...
BrightHeart said:
Okay last night I attempted battery removal from the device. I took off the back panel of nexus 7 and disconnected the battery cable which is connected to motherboard socket. I reconnected it after 10mins and still no success. I removed it again and connected the device to computer by USB and I found something very strange. the computer detected the Nexus 7 as "Unknown APX Device" even after the battery was disconnected. I was wondering from where is the device drawing power to run? Is it by computer's USB port alone or is there any other power source in nexus7's motherboard like a CMOS cell is present in Computer's MotherBoard which keeps the clock ticking.
Whatever may be the case but it seems that APX Mode is capable of running in minimal power input.
Next test which I performed was to Hold the power button while it was connected to system by USB. After about 7-8secs the device powered off as the computer displayed USB device disconnected message and sound but it repowered on its own in next couple of seconds and again it was detected as "APX device" . Same result observed with simultaneous holding of volume minus+power button as well.
Now I have every reason to believe that device is hard bricked and looped in APX i.e. The Bootloader is corrupted or is not running due to some reason. The device has no option but to go in APX and sit there forever unless its flashed at low level.
I would like to give nvflash a try but i know that theres no1 yet who has made it success and then the only option remaining for me is to visit Asus service center and get some paid service done.
Query - If I visit Asus service center then will they perform software reprogramming i.e. Bootloader fixing or will they replace the hardware ? Incase if they replace the hardware then will they replace the whole board or just the memory unit(which contains Bootloader) from the board?
Experts here please put some light on this
Click to expand...
Click to collapse
Same Issue!
seanet1970 said:
Did you have any luck with this BrightHeart? I seem to be in the same boat now...
Click to expand...
Click to collapse
Looks like this problem is quite common and mostly affecting Nexus 7 2012 devices. Mine to got botched after a OTA update. Any possibilities of Google fixing this /RMA beyond warranty ?
My Nexus 7 (2012 wi-fi) won't turn on anymore. The screen doesn't show anything, not even the bootloader. When we plug it to the PC, it seems to be recognizing a different device (such as a camera, I don't know) and just for a second not even installing the drivers.
After asking a technician, he found that the battery (working with another N7) was working properly and no damage was found. Is there any hope? Anything we can do?
Model: Nexus 7 wi-fi (2012) - 32Gb
Was running: A custom ROM/kernel based on android 5.1.1
When Plugged to pc: APX device
Thanks
If you are lucky, the device is stuck in APX mode. Let it charge for some time (1-2 hours) and then press the power button for at least 20 seconds. In that case the devcie should leave APX mode and you should be able to boot to bootloader / recovery / ... again. If not, I suppose some hardware issues with your device.
I didn't work
AndDiSa said:
If you are lucky, the device is stuck in APX mode. Let it charge for some time (1-2 hours) and then press the power button for at least 20 seconds. In that case the devcie should leave APX mode and you should be able to boot to bootloader / recovery / ... again. If not, I suppose some hardware issues with your device.
Click to expand...
Click to collapse
I did that, I checked the battery charge with my other nexus 7 (my mother has the same tablet) and I long pressed the power button but nothing happened. In the other hand, I plug it to the pc again and it recognized an APX device "installing" the drivers (are installed but don't do anything). I read other forums about APX mode and i tried the button stuuf plug/unplug they were talking about other things that i don't unerstand.
I will edit the original post to bring more information. Thank you
I was able to unlock my bootloader via fastboot (using the tegra note 7 oem unlock commands). My s7e rebooted and everything was working normally. I loaded the bootloader again to go in and do a cache wipe and my 3 year old bumped into me as I was holding down the volume+ and power buttons and I ended up tapping the volume- at the same time. Now I'm stuck in ADX mode (black screen but recognized by my pc, have tried connecting to charger, volume+ and power, volume - and power, nothing works) . I've read that Advent has released apx files for the Vega Note 7 and you can use Tegra Note 7 Super Tools to restore the Nvidia Note 7. I downloaded those and used the Nvidia APX Forced Flash with Serial Fix found here: http://forum.xda-developers.com/nvidia-tegra-note-7/general/nvidia-tegra-note-7-apx-images-t3149839 but nvflash hangs at the chip uid before trying the serial fix error I got the invalid serial number error.
I have read that some other devices can be recovered from APX mode by removing the battery and plugging the tablet up and letting it boot fully before replacing the battery. I might try this but the battery is soldered on.
Does anyone have any other software fixes that I can try?
red_dragon7 said:
I was able to unlock my bootloader via fastboot (using the tegra note 7 oem unlock commands). My s7e rebooted and everything was working normally. I loaded the bootloader again to go in and do a cache wipe and my 3 year old bumped into me as I was holding down the volume+ and power buttons and I ended up tapping the volume- at the same time. Now I'm stuck in ADX mode (black screen but recognized by my pc, have tried connecting to charger, volume+ and power, volume - and power, nothing works) . I've read that Advent has released apx files for the Vega Note 7 and you can use Tegra Note 7 Super Tools to restore the Nvidia Note 7. I downloaded those and used the Nvidia APX Forced Flash with Serial Fix found here: http://forum.xda-developers.com/nvidia-tegra-note-7/general/nvidia-tegra-note-7-apx-images-t3149839 but nvflash hangs at the chip uid before trying the serial fix error I got the invalid serial number error.
I have read that some other devices can be recovered from APX mode by removing the battery and plugging the tablet up and letting it boot fully before replacing the battery. I might try this but the battery is soldered on.
Does anyone have any other software fixes that I can try?
Click to expand...
Click to collapse
You need the APX images directly from HP as they have a different setup when it comes to the bootloader and signature. So long as it still is going to APX mode there is a chance that you can recover the tablet but you'll need to contact HP for the APX images as it has to be signed by HP for it to work.
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
--------------------------------
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