Database Develop

Galaxy Tab 8.9 3G Hard bricked?

I've tried to put a new ROM using Clockwork Recovery 6.0.1.2, during process it stuck for 4 hours and was turned off by power button.
After that tab don't react on power button, on pwr+vol up, pwr+vol down, pwr+ both vol buttons, nothing.
It even doesn't show battery icon when charging - screen is always black.
Any advices?
Thanks in advance.

I think the method described here will do the trick: http://forum.xda-developers.com/showthread.php?t=1478361
kallt_kaffe is having the same problem and he describes the procedure as: "basically tape down the power button to force a reboot cycle."

Aecidz said:
I've tried to put a new ROM using Clockwork Recovery 6.0.1.2, during process it stuck for 4 hours and was turned off by power button.
After that tab don't react on power button, on pwr+vol up, pwr+vol down, pwr+ both vol buttons, nothing.
It even doesn't show battery icon when charging - screen is always black.
Any advices?
Thanks in advance.
Click to expand...
Click to collapse
1. Put on your computer headphones and turn the volume up.
2. Plug your tablet into your computer via USB.
3. Hold the power button & Vol - keys together (Volume - is the side that is closest to the power button)
4. Listen for the "USB device connected" or "USB device disconnected" sound on your PC
5. If you can hear that, something has gone bad within the bootloader and the display does not initialize properly. Edit: The ICS installation does indeed attempt to patch the bootloader
6. If there is no sound, then the tablet is stuck in limbo, so go ahead and do the battery drain procedure as described in the above post.
7. If, however, your computer detects a device connecting and makes the sound, you can most likely still enter Download mode. You will have to do it blindfolded though:
-open ODIN 1.85 and see if it shows a connected device. If your PC made a connected sound, then there will most likely be a yellow COM port in ODIN.
- Hold [Power] & [Volume Down] together for 15 seconds or longer whilst monitoring your Device Manager windows to see if you can get the tablet out of APX mode and have it appear as another type of Device. Then press Volume+ several times with 1.5 sec. intervals. With luck, this should get you into Download mode, and ODIN will shine yellow for you.
- While doing all of the above keep your headphones on and listen for connected or disconnected sounds from your PC.
- Make sure you have this firmware for the P7300 which contains a bootloader, which is essential: http://www.hotfile.com/dl/162686792/c693269/P7300ZSKK2_P7300ZZHKK2_TGY.zip.html
- Flash with "Bootloader update" checked in ODIN and see if device is resuscitated. If the tablet boots, it will be in Hong-Kongish, but just select a language you recognize from the dropdown, it has them all.
- It may be a good idea to also throw in a .pit file and check Repartiton
N.B. The firmware link that I have provided is for the Tab 8.9 3G P7300 only! Do not flash it on another version of the 8.9!
You will need to search for a firmware that contains a bootloader.bin.md5 file for your tablet model.
Again, all of this will only be possible if the device registers with your PC on connecting the USB cable.

de3pkeeper said:
1. Put on your computer headphones and turn the volume up.
2. Plug your tablet into your computer via USB.
3. Hold the power button & Vol - keys together (Volume - is the side that is closest to the power button)
4. Listen for the "USB device connected" or "USB device disconnected" sound on your PC
5. If you can hear that, something has gone bad within the bootloader and the display does not initialize properly.
6. If there is no sound, then the tablet is stuck in limbo, so go ahead and do the battery drain procedure as described in the above post.
7. If, however, your computer detects a device connecting and makes the sound, you can most likely still enter Download mode. You will have to do it blindfolded though:
Click to expand...
Click to collapse
Ok, I've disassembled the device, and removed a battery connector for a time.
Didn't help though.
When I'm connecting tab to PC and holding pwr+vol_down, I hear that connect-disconnect sound and there is a device called
NVIDIA USB Boot-recovery driver for Mobile devices blinking in Device Manager with those sounds.
Odin shows no yellow com, all are empty, so download mode is not available.

you are stuck in APX mode , First go to this link and follow the instructions : http://forum.xda-developers.com/showthread.php?t=1130574]
if you get this in nvflash :
Nvflash started
rcm version 0X4
Command send failed (usb write failed)
this means your device is locked and the battery draining is that last thing that might work for you .
i still didn't try it, but i only disconnected the battery and connect it again but my device still dead for a month now .

DSHV said:
you are stuck in APX mode , First go to this link and follow the instructions : http://forum.xda-developers.com/showthread.php?t=1130574]
if you get this in nvflash :
Nvflash started
rcm version 0X4
Command send failed (usb write failed)
this means your device is locked and the battery draining is that last thing that might work for you .
i still didn't try it, but i only disconnected the battery and connect it again but my device still dead for a month now .
Click to expand...
Click to collapse
I'm getting exactly what you posted:
Nvflash started
rcm version 0X4
Command send failed (usb write failed)
and right after that tab disconnects from pc and disappear from devices list.
is it possible, that some Samsung Service Center will help me? I think that what I did voids the warranty, but anyway, I'm in Ukraine and getting official support here is almost mission impossible.

Aecidz said:
I'm getting exactly what you posted:
Nvflash started
rcm version 0X4
Command send failed (usb write failed)
and right after that tab disconnects from pc and disappear from devices list.
is it possible, that some Samsung Service Center will help me? I think that what I did voids the warranty, but anyway, I'm in Ukraine and getting official support here is almost mission impossible.
Click to expand...
Click to collapse
unfortunately the sbk (secure boot key) for locked Samsung devices is unknown and i was hoping that someone will be able to provide it since it's now increasing problem for 8.9 and 10.1 tabs especially after ics update . actually this is well known mode(apx) with all Nvidia Tegra devices such as acer a100 tablet and asus transformer ee pad but developers there were able to find the sbk for these devices .
if you are covered by warranty and the battery drain method didn't solve the problem you should go to Samsung and good luck . i am not covered by warranty and the only solution i found after connecting Samsung here in Egypt is replacing the mainboard costing almost as a new device (even Samsung couldn't fix it) .

DSHV said:
the only solution i found after connecting Samsung here in Egypt is replacing the mainboard costing almost as a new device (even Samsung couldn't fix it) .
Click to expand...
Click to collapse
Not very reassuring... Hope they will fix mine. I don't see any way to do it by myself.

Aecidz said:
Not very reassuring... Hope they will fix mine. I don't see any way to do it by myself.
Click to expand...
Click to collapse
Sounds like they want to get your cash.
If things went to sh*t software-wise, they can be fixed the same way.
They could just UART into the board and restore the bootloader. I don't have to expertise to do it, but they should have it.

1. Put on your computer headphones and turn the volume up.
2. Plug your tablet into your computer via USB.
3. Hold the power button & Vol - keys together (Volume - is the side that is closest to the power button)
4. Listen for the "USB device connected" or "USB device disconnected" sound on your PC
5. If you can hear that, something has gone bad within the bootloader and the display does not initialize properly.
6. If there is no sound, then the tablet is stuck in limbo, so go ahead and do the battery drain procedure as described in the above post.
7. If, however, your computer detects a device connecting and makes the sound, you can most likely still enter Download mode. You will have to do it blindfolded though:
Click to expand...
Click to collapse
1-7 okay. And device is "NVIDIA USB Boot-recovery driver for Mobile devices", not APX (because i installed special driver).
But nothing happend when i try to enter Download mode.
USB Disconnect > Connect > Pressing power and vol button for ~7 seconds (why 15+?.. So 15 i tried too) > Sound > Pressing V+ 10 times... Nothing glows in Odin.

eskimono said:
1-7 okay. And device is "NVIDIA USB Boot-recovery driver for Mobile devices", not APX (because i installed special driver).
But nothing happend then i try to enter Download mode.
USB Disconnect > Connect > Pressing power and vol button for ~7 seconds (why 15+?.. So 15 i tried too) > Sound > Pressing V+ 10 times... Nothing glows in Odin.
Click to expand...
Click to collapse
I had a broken bootloader and my display was dead the same way all of youse with bricked tabs describe.
It appears that in your case the bootloader is so badly messed up, that a fail-safe kicks in and sends the tab into APX mode directly.
Consider disassembling your device to disconnect the battery, press Power a few times with ti disconnected and keep it disconnected for a minute or so to force discharge of all capacitors, then reconnecting and attempting a reboot.
Disassembly is really easy - get a plastic knife and stick it under the display near the charging port and work your way around the whole unit. The entire display comes out of the back cover. Flip the display around and there you will notice where the battery connects to the main board, unplug the connector.

Have you tried?
And wut i must do after that?
---------- Post added at 11:46 AM ---------- Previous post was at 11:11 AM ----------
Disassemble, disconnect battery, press power, short + and - (on device, not on battery lol)... After that connect battery and connect via usb ... the same. cant enter download menu.(

Will try this > http://forum.xda-developers.com/showthread.php?t=1478361
If wont work - service center

Aecidz said:
I've tried to put a new ROM using Clockwork Recovery 6.0.1.2, during process it stuck for 4 hours and was turned off by power button.
After that tab don't react on power button, on pwr+vol up, pwr+vol down, pwr+ both vol buttons, nothing.
It even doesn't show battery icon when charging - screen is always black.
Any advices?
Thanks in advance.
Click to expand...
Click to collapse
Hi, may I know what new ROM did you flash? And your previous ROM before flashing. So that we can all avoid that ROM until somebody can fix this mess cause by brickbug. Thanks.

Nah. Samsung service sucks.
They said that motherboard should be replaced.
I don't understand how software problem couldn't be fixed w/o hardware replacement.
Screw that, I'll go get Nexus 7.

nexus_g said:
Hi, may I know what new ROM did you flash? And your previous ROM before flashing. So that we can all avoid that ROM until somebody can fix this mess cause by brickbug. Thanks.
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1789464 <- that one. Version with N7UI (Build 11 Beta 9: (link) (Stable Build)(N7UI))
Not sure if it's ROM problem though.
Maybe it's just my karma.

Aecidz said:
http://forum.xda-developers.com/showthread.php?t=1789464 <- that one. Version with N7UI (Build 11 Beta 9: (link) (Stable Build)(N7UI))
Not sure if it's ROM problem though.
Maybe it's just my karma.
Click to expand...
Click to collapse
Actually it turns out to be the problem with CWM 6.0.1.2. You should use 6.0.0.8 or less.

manpete said:
Actually it turns out to be the problem with CWM 6.0.1.2. You should use 6.0.0.8 or less.
Click to expand...
Click to collapse
too late anyways.
but thanks for the info.

de3pkeeper said:
I had a broken bootloader and my display was dead the same way all of youse with bricked tabs describe.
It appears that in your case the bootloader is so badly messed up, that a fail-safe kicks in and sends the tab into APX mode directly.
Consider disassembling your device to disconnect the battery, press Power a few times with ti disconnected and keep it disconnected for a minute or so to force discharge of all capacitors, then reconnecting and attempting a reboot.
Disassembly is really easy - get a plastic knife and stick it under the display near the charging port and work your way around the whole unit. The entire display comes out of the back cover. Flip the display around and there you will notice where the battery connects to the main board, unplug the connector.
Click to expand...
Click to collapse
My tab was bricked and I followed your post but there is ghost, my tab is still on after 4 hours without the big battery, the secondary battery is so strong (I dont know where its placed)... I dont know how to drain it fastest.
the big battery connector are 5 wires, 2 red, 1 blue and 2 black, are they????

de3pkeeper said:
7. If, however, your computer detects a device connecting and makes the sound, you can most likely still enter Download mode. You will have to do it blindfolded though:
-open ODIN 1.85 and see if it shows a connected device. If your PC made a connected sound, then there will most likely be a yellow COM port in ODIN.
- Hold [Power] & [Volume Down] together for 15 seconds or longer whilst monitoring your Device Manager windows to see if you can get the tablet out of APX mode and have it appear as another type of Device. Then press Volume+ several times with 1.5 sec. intervals. With luck, this should get you into Download mode, and ODIN will shine yellow for you.
- While doing all of the above keep your headphones on and listen for connected or disconnected sounds from your PC.
- Make sure you have this firmware for the P7300 which contains a bootloader, which is essential: http://www.hotfile.com/dl/162686792/c693269/P7300ZSKK2_P7300ZZHKK2_TGY.zip.html
- Flash with "Bootloader update" checked in ODIN and see if device is resuscitated. If the tablet boots, it will be in Hong-Kongish, but just select a language you recognize from the dropdown, it has them all.
- It may be a good idea to also throw in a .pit file and check Repartiton
Click to expand...
Click to collapse
My tab has a blank screen and went through the steps you mentioned. ODIN has a yellow com port and when I try to flash the firmware+bootloader ODIN stops in "SetupConnection".. I tried to change port, cable, odon version to no avail. Any ideas? Thanks!

HTC ONE M7 - Not turning on

Hey everyone,
I apologise if this has been asked many times before; but I need some assistance with my HTC one M7.
I was using the phone with low battery - with power saver turned on, it turned off completely after a few moments.
I have put the phone on charge, but the LED indicator is not showing up nor the phone turning on or charging at all.
I went through forums, and tried the power button + volume down button to bring up the boot menu, this menu did actually appear - but me being the fool I am - I selected the power down option.
I have been unable to bring the menu up again with the power + volume button combination.
I then connected the phone to my PC - where its installs a driver - qhsusb_dload. I have tried the power + volume button combination with it being connected to my PC - where I hear the device detected bing and device disconnected bing while I hold these buttons down, still unable to charge/power on/ or bring up the boot menu.
I have also left the phone on wall charger for over 12 overs again to no avail.
Can anyone provide any advice - or any method I can salvage the data stored on it i.e. photos?
Thanks for reading - appreciate any help!

AntMans123 said:
I then connected the phone to my PC - where its installs a driver - qhsusb_dload.
Click to expand...
Click to collapse
http://forum.xda-developers.com/showpost.php?p=67835309&postcount=2805
any method I can salvage the data stored on it
Click to expand...
Click to collapse
Not possible if its not booting...

AntMans123 said:
Hey everyone,
I apologise if this has been asked many times before; but I need some assistance with my HTC one M7.
I was using the phone with low battery - with power saver turned on, it turned off completely after a few moments.
I have put the phone on charge, but the LED indicator is not showing up nor the phone turning on or charging at all.
I went through forums, and tried the power button + volume down button to bring up the boot menu, this menu did actually appear - but me being the fool I am - I selected the power down option.
I have been unable to bring the menu up again with the power + volume button combination.
I then connected the phone to my PC - where its installs a driver - qhsusb_dload. I have tried the power + volume button combination with it being connected to my PC - where I hear the device detected bing and device disconnected bing while I hold these buttons down, still unable to charge/power on/ or bring up the boot menu.
I have also left the phone on wall charger for over 12 overs again to no avail.
Can anyone provide any advice - or any method I can salvage the data stored on it i.e. photos?
Thanks for reading - appreciate any help!
Click to expand...
Click to collapse
If you get it to go into that boot menu again. You sometimes have to hold the power and volume down for about 15 seconds, then release them and again start holding the volume down. This is something I had to do to get into recovery back when my bootloader was still locked.
The power may not coming on, but if you are getting usb sounds from plugging it in maybe the computer you are connecting to could be switched.
I had hard times connecting before from certain machines cause they wanted to run an HTC Sync program. You could try a different machine.
Often people say regarding the behavior of the 3.0 vs 2.0 USB ports, that it is 2.0 that will work. And you might try a Vista machine to get fastboot working.

kruc Ire said:
If you get it to go into that boot menu again. You sometimes have to hold the power and volume down for about 15 seconds, then release them and again start holding the volume down. This is something I had to do to get into recovery back when my bootloader was still locked.
The power may not coming on, but if you are getting usb sounds from plugging it in maybe the computer you are connecting to could be switched.
I had hard times connecting before from certain machines cause they wanted to run an HTC Sync program. You could try a different machine.
Often people say regarding the behavior of the 3.0 vs 2.0 USB ports, that it is 2.0 that will work. And you might try a Vista machine to get fastboot working.
Click to expand...
Click to collapse
qhsusb_dload is a well known issue, not caused by the computer you are coonecting to. Its can be caused by a bad firmware flash (flashing an incompatible firmware.zip) or because of an hardware failure. Easy to know what is the cause. Did the phone randomly went in qhsusb_dload mode? Yes ---> Hardware,will most likely need a motherboard replacement. Did the phone went in qhsusb_dload directly after flashing something? Yes ---> Software problem can be fixed with the unbrick project.

ZUK Z2 not booting anymore after restore

Hey,
so I was running cm13 (some version from november) and i wanted to go back to zui so i restored a backup that i created when i first got the phone. i booted into twrp, pressed on restore and selected my backup. after waiting for the backup to restore i saw that the process failed. then i pressed on the return to system or whatever button and now my phone wont boot anymore. when i hold power it just vibrates and the notification led flashes once. when i plug it in to charge the notification led doesnt light up. also when connecting it to my pc it is recognized (sound when you plug something in/out) but its not recognized as a phone or storage. what do i do?

Hi,
small question.
Did you do a full wipe?
Please delete system and data partition.
Because you come from cm13 to stock.

Are you able to enter fastboot? Press and hold volume down button and then hold the power button. Alternatively if your phone is off just unplug it and leave it for a few minutes, then whilst holding just the volume down button plug it into your PC and then check with "fastboot devices" in your terminal (I'm assuming that you do have adb and fastboot tools on your phone since you had a custom ROM).

@djsven I just went into twrp and tried to restore my back up not more not less. I cant delete the data and system partition as my device isnt turning on and my pc doesnt recognize the phone as a storage device.
 @Uivalf39 by holding volume down and power button i cant enter. all it did was vibrate + led flash. I think its on 0% power now because holding power now just makes the led flash once (no vibration anymore). can you tell me what exactly you mean by "check with "fastboot devices"".
thanks to everyone trying to help

mdeoinko said:
@djsven I just went into twrp and tried to restore my back up not more not less. I cant delete the data and system partition as my device isnt turning on and my pc doesnt recognize the phone as a storage device.
@Uivalf39 by holding volume down and power button i cant enter. all it did was vibrate + led flash. I think its on 0% power now because holding power now just makes the led flash once (no vibration anymore). can you tell me what exactly you mean by "check with "fastboot devices"".
thanks to everyone trying to help
Click to expand...
Click to collapse
You'll first need to install adb and fastboot tools, as well as drivers for the phone and google utilities. I assume you already have these since you must have unlocked your phone and flashed twrp to install CM13.
Sending the "fastboot devices" command through an adb/fastboot enabled terminal will show you if your phone is fastboot-enabled. Your phone is bricked, the only way to go back to the original software is to follow the guide (available both here and on zukfans), TWRP backup won't work with stock ROMs.
Don't worry though, you should be able to recover it, but it'll be a lot of trial and error.
Have a read through here and here and here, seems like a lot of good troubleshooting material for bricked devices.
Let us know how you get on.

My phone was recognized as QUSB_BULK in device manager. i installed qhsusb drivers and now its in ports and its called "qualcomm hs-usb diagnostics 900e (com10)". trying to find out what to do now.

mdeoinko said:
My phone was recognized as QUSB_BULK in device manager. i installed qhsusb drivers and now its in ports and its called "qualcomm hs-usb diagnostics 900e (com10)". trying to find out what to do now.
Click to expand...
Click to collapse
Oh dear, from the stuff I found on Google, it sounds like you'll have to disconnect the battery to force the phone to shut down everything before carrying on.
Check out this thread on zukfans, specifically these comments: [1] [2]
This is the danger of having phones with non-removable batteries. Sounds like you might have to remove the back glass, shouldn't be TOO difficult, looks like it's just glued down without any clasps so you'll need a heat gun (hair dryer should do). Here is a guide on doing that.
If you do end up doing that, would you be willing to film it and upload it to YouTube afterwards? I can't find any video of such a feat and it would be useful for anyone else who needs to do that. Maybe even add some comments of whether there are any clasps, how long you had to heat it up, etc.
In the past I've been successful in unbricking my phones by draining them until the battery protection circuitry wouldn't allow for any more power to be drawn. This would roughly be equivalent to unplugging the battery so it might work for you depending what the phone is currently doing. If the screen comes on then you should be able to drain it, if only your notification light flashes then it's a fool's errand.
NB: The zukfans poster's step 1 was to fully charge your phone as you'll need full battery for the solution. What I described above will probably not work but there's always multiple solutions to every problem and if you're weary of removing the back you can try that, don't hold me on this, but I it shouldn't do any damage.

@Uivalf39
I managed to remove the battery connector. after putting it back in and now im trying to do the sequence i still dont understand because of bad phrasing (hold vol up then hold power then after 0.5s plug usb in? hold vol up hold power for 0.5s after plugging in? idk). all i now get is a slow flashing led when connecting it to anything via usb no matter what i press. i dont even know if its charging

mdeoinko said:
@Uivalf39
I managed to remove the battery connector. after putting it back in and now im trying to do the sequence i still dont understand because of bad phrasing (hold vol up then hold power then after 0.5s plug usb in? hold vol up hold power for 0.5s after plugging in? idk). all i now get is a slow flashing led when connecting it to anything via usb no matter what i press. i dont even know if its charging
Click to expand...
Click to collapse
After doing that, what do you have on device manager? Is it still as before with the 900e?
Alright, so from what I understand it goes something like this:
Unplug battery connector
Wait 10-15 seconds with the connector unplugged
Plug back battery connector
Press and HOLD volume up button
Whilst holding volume up press power button and hold it down
After 0.5s of holding power button plug in the usb (connected to the PC) - still keep holding the volume up and power button
Keep holding volume up and power button, and the ZUK logo should pop on the screen and phone should vibrate
Now release buttons and your phone should appear in device manager as port 9008
How did you find removing the glass back? How did you do it and how difficult would you say it was?

@Uivalf39 Im pretty sure im getting the timing right but all i get is a slowly flashing nofication led. no vibration and no logo. also my device doesnt get recognized at all on my pc i cant find it in device manager.
removing the back was pretty easy i just heated the 3 corners (the ones without a camera) on max for like 2 min each with a hair dryer. then i pushed in a plectrum and went around the edges with it.

@mdeoinko That's really strange, maybe we'll need to think a bit outside the box. What version of Windows are you using? Do you have the qualcomm/zuk/google drivers installed properly?
Here's one comment that might be useful.
Also, Francko from zukfans (main ROM guy so I guess he knows his stuff) did some trickery with the USB cable, not entirely sure what it is and how it works, but it looks like it does so you might want to look into this.
I'd say that you should maybe post to zukfans, you'll get more help there.
Godspeed my son!

@Uivalf39 damn i completely forgot about modifieng the cable brb hopefully i can fix it now

@mdeoinko
Hiya, any update? Hoping that your lack of posts means that you solved the issue and no longer need help. If so, could you post here what you did to solve it? Such that anyone else with this issue that comes across this thread might know what works and what doesn't.
Cheers!

i need help, cant signup into zukfans giving error as spam activity, cant go into 9008 mode, tried everything accept removing back of the fone. any guesses...

HTC One M7 wont start and no charging light as well

Hi Guys,
My HTC One M7 suddenly slowed down a bit yesterday. So generally i restart it and it works fine. So i did the same this time. But this time once it powered off it didn't start again. It was at 90% charge when i restarted it. Now when i put it on charge there is neither screen display nor the charging light glow red or green.
I have put it on charge for almost a day and still no response. I also tried a lot of things by now like holding down the power button for a minute or so / holding down the power button + vol down for a minute or so / power button + vol up for a minute or so. Even tried the power button + vol down near a bright light source. Nothing works till now.
Please help me out to figure out what is going wrong. Any help is deeply appreciated.

Dan9876 said:
Hi Guys,
My HTC One M7 suddenly slowed down a bit yesterday. So generally i restart it and it works fine. So i did the same this time. But this time once it powered off it didn't start again. It was at 90% charge when i restarted it. Now when i put it on charge there is neither screen display nor the charging light glow red or green.
I have put it on charge for almost a day and still no response. I also tried a lot of things by now like holding down the power button for a minute or so / holding down the power button + vol down for a minute or so / power button + vol up for a minute or so. Even tried the power button + vol down near a bright light source. Nothing works till now.
Please help me out to figure out what is going wrong. Any help is deeply appreciated.
Click to expand...
Click to collapse
Any sign of life when connected to a computer (look in Windows devices manager when connecting the phone)?

alray said:
Any sign of life when connected to a computer (look in Windows devices manager when connecting the phone)?
Click to expand...
Click to collapse
Thank you for the response.
Yes, when I connect to my computer it is listed under the section -
> Ports(COM & LPT)
Qualcomm HS-USB QDLoader 9008 (COM3)

Dan9876 said:
Thank you for the response.
Yes, when I connect to my computer it is listed under the section -
> Ports(COM & LPT)
Qualcomm HS-USB QDLoader 9008 (COM3)
Click to expand...
Click to collapse
Yeah that's what I thought, your phone went in QHSUSB mode and that is not good news. There are 2 known causes of the M7 going in QHSUSB mode:
1-You manually updated your firmware using an incomplete/partial firmware.zip (a firmware.zip not containing all the required .img files) and this caused incompatibility in the firmware. This can be solved using this method
2- You did nothing special before it happened, phone just went in this mode by itself = Hardware failure. Motherboard most likely need to be replaced, there is no "software" fix in this situation.

alray said:
Yeah that's what I thought, your phone went in QHSUSB mode and that is not good news. There are 2 known causes of the M7 going in QHSUSB mode:
1-You manually updated your firmware using an incomplete/partial firmware.zip (a firmware.zip not containing all the required .img files) and this caused incompatibility in the firmware. This can be solved using this method
2- You did nothing special before it happened, phone just went in this mode by itself = Hardware failure. Motherboard most likely need to be replaced, there is no "software" fix in this situation.
Click to expand...
Click to collapse
I think my case is the case-2. I just did a restart and it happened. Seems like hardware failure. This sounds like an expensive fix for an old phone

Someone tried this? (ROG2 don't turn on after gaming and charging same time)

Aleatory YouTube videos explaining the problem and possible fixes, I don't recommend this channel, I don't know the YouTuber.
ROG2 here turns off and not power on again after gaming and charging same time (it's dead). Someone here tried one of this with success?
Change IC PM8150B
Reballing the CPU

Hello there!
I have no experience with your problem. Just going to say that from the top. I've never torn a phone down, and when hardware components need replacing that's when I usually decide I need to pick up a new phone.
I just recommend you make sure the phone you're trying to fix like this actually needs it. I've messed with my tencent rog ii quite a bit lately and I have had the phone go completely black - thinking I had thoroughly destroyed my phone, but I was able to get it running again.
It's possible that the complete "power off" that you are reporting is the phone being in EDL mode as the phone gives no indication whatsoever that it is on when in EDL mode. As a hail mary maybe you should quickly try this before tearing your phone down.
go to this guide, and download the zip file in the main post.
Repair your ROG2 phone with EDL mode，Official firmware！
Success is disgusted by some people, and will not share any files for free in the future.
forum.xda-developers.com
extract the zip, then go the the folder "qpst.win.2.7_installer_00453.2" and run "QPST.2.7.453.msi" - this installs the drivers necessary to communicate with your phone when in EDL mode (this may not be necessary, as your pc may identify a usb connection without this, but just to check 100% I'd install the drivers anyway.)
charge your phone for at least 30 minutes. just to make sure it's got juice.
use a DIFFERENT USB-C <-> USB-A cable than came with your phone (pick one up at the shop if you're not sure. ALSO plug your [charged] phone into your PC using the side USB port on the phone (Not the bottom usb port). This is because ASUS's cables don't seem to support flashing, so I'm suspicious if they'd work appropriately in this case, and because the side port is the only one that works for flashing and the like.
now open device manager (press windows key, type "device manager"). with that screen open, plug your phone in. On device manager you're hoping that a device appears under the menu "Ports (COM & LPT)" probably named something to do with Qualcomm.
if nothing shows up, unplug the usb port from the side and hold all three side buttons down for 20 seconds (vol +, vol -, and pwr) and keep an eye on the upper left side of the device where you MAY see a red light flash indicating signs of life. then plug it in again. if nothing happens unplug the phone, and hold the power button for 5 seconds, and plug it in again. if nothing happens, unplug it and try holding down just power and volume up for 20 seconds, then plug in again. If nothing happens, try power and volume down for 20 seconds, then plug in again. (you see where I'm going?) just make absolutely sure your phone has a hardware problem and can't connect to your PC in any way before performing surgery. If the device does show up under this "Ports (COM & LPT)" device it means your phone OS is thoroughly trashed. check out that same guide I linked, as well as this youtube for some ideas how to get it going again.
If your phone doesn't connect no matter what, and you're certain you've gotta get into the hardware, then I wish you the best of luck. I really wish I could be of any further assistance with regards to hardware. maybe if you do take that road let us know how it goes.
good luck!