Database Develop

[Q]HOW TO RECOVER A HARD Bricked Sony XZC6002?

This is a HARD Bricked phone that first started going berserk after a partial install of a SONY software update. The phone would flash the home screen and continually vibrate. I forced it down with power off. Did not know what I was doing and believe I converted a soft brick to a hard brick. The soft brick at first responded to power button and volume up button to reboot. After that point it became more and more unresponsive to complete death.
It is not recognized by PC (even in the device manager) when plugged into USB port on PC. NO LED or any lights on the phone at all! No red charging LED with charger plugged in, No Sony screen icon, no vibration with power button pushed hard for >10 seconds (with and without pushing up/down volume). The ONLY response I get is an audible windows sound coming from my PC as long as I hold the power and volume up button down.
I have left the phone off a charger for >48 hours and then placed it on the charger for 6-7 hours. Still no red LED while on the phone was on the charger. Reason for me doing this was my reading notes that Sony had a battery error issue that could only be solved by removing the battery or draining it completely. Recharging the battery was suppose to be a fix. A recent poster did this (removed the battery) which is a job and was able to get a red LED but nothing else. There was no reply.
My readings also indicated that there are a number of people with this problem (hard bricked phone) involved with download or install of their software Sony reportedly has a fix to install to correct it. I am a day late and a dollar short.
BTW, the Sony PC companion works up until I connect the phone to the PC and then an error message appears to make sure battery is charged to 80% before proceeding. Ignoring that brings up a troubleshooting screen prompting holding the power button and volume up button for 10 seconds. This is where I get an audible windows connect/disconnect sound coming from my PC that will keep sounding as long ass I hold the buttons down and stops after I remove them. Could this possibly be just a battery issue? Any help is greatly appreciated.

jorthodoc said:
This is a HARD Bricked phone that first started going berserk after a partial install of a SONY software update. The phone would flash the home screen and continually vibrate. I forced it down with power off. Did not know what I was doing and believe I converted a soft brick to a hard brick. The soft brick at first responded to power button and volume up button to reboot. After that point it became more and more unresponsive to complete death.
It is not recognized by PC (even in the device manager) when plugged into USB port on PC. NO LED or any lights on the phone at all! No red charging LED with charger plugged in, No Sony screen icon, no vibration with power button pushed hard for >10 seconds (with and without pushing up/down volume). The ONLY response I get is an audible windows sound coming from my PC as long as I hold the power and volume up button down.
I have left the phone off a charger for >48 hours and then placed it on the charger for 6-7 hours. Still no red LED while on the phone was on the charger. Reason for me doing this was my reading notes that Sony had a battery error issue that could only be solved by removing the battery or draining it completely. Recharging the battery was suppose to be a fix. A recent poster did this (removed the battery) which is a job and was able to get a red LED but nothing else. There was no reply.
My readings also indicated that there are a number of people with this problem (hard bricked phone) involved with download or install of their software Sony reportedly has a fix to install to correct it. I am a day late and a dollar short.
BTW, the Sony PC companion works up until I connect the phone to the PC and then an error message appears to make sure battery is charged to 80% before proceeding. Ignoring that brings up a troubleshooting screen prompting holding the power button and volume up button for 10 seconds. This is where I get an audible windows connect/disconnect sound coming from my PC that will keep sounding as long ass I hold the buttons down and stops after I remove them. Could this possibly be just a battery issue? Any help is greatly appreciated.
Click to expand...
Click to collapse
Firstly, you've made one major mistake when you've turned off your phone by using force. It can completely brick your phone forever.
Secondly, if you can hear any sound when connect your phone to USB, then thats mean, that your phone is still in minimal functionality. However, you can give a try to buy a new battery and see, how it goes.
It's better to buy extra battery, than change the whole phone, am I right?
And try to leave your phone without touching it for couple days I think. Maybe your battery somehow has got any fault or it has been faulted when you've force-shutted the phone.
Just give a try and that's all. You can't do anything else, except if you know and you're ready for phone disassembly. If none of my suggested methods will work, then try some other tutorials, you can search for them in XZ category's. I've forgotten how that thread is named, but you can search by some key-words, like : ultimate recovery, back to life, unbrick and etc.,
I hope my information is all correct and helpful, if not, then sorry for disturbation for nothing

LaurynasVP said:
Firstly, you've made one major mistake when you've turned off your phone by using force. It can completely brick your phone forever.
Secondly, if you can hear any sound when connect your phone to USB, then thats mean, that your phone is still in minimal functionality. However, you can give a try to buy a new battery and see, how it goes.
It's better to buy extra battery, than change the whole phone, am I right?
And try to leave your phone without touching it for couple days I think. Maybe your battery somehow has got any fault or it has been faulted when you've force-shutted the phone.
Just give a try and that's all. You can't do anything else, except if you know and you're ready for phone disassembly. If none of my suggested methods will work, then try some other tutorials, you can search for them in XZ category's. I've forgotten how that thread is named, but you can search by some key-words, like : ultimate recovery, back to life, unbrick and etc.,
I hope my information is all correct and helpful, if not, then sorry for disturbation for nothing
Click to expand...
Click to collapse
My gut tells me that the battery is OK but needs to be recharged. Apparently there is something that will not allow the battery to recharge unless it is removed or drained to zero. I thought I drained it to zero but perhaps not. The other case where the battery was removed and was then able to show a red LED apparently allowed the battery to recycle. That's as far as he got.
In the mean time I'm taking your advise and just letting the phone sit until someone makes a suggestion or I get tired of looking at it.
Thank you for your time and suggestions.

Can you enter the "fastboot" mode (unlocked bootloader) /"flash mode" (locked bootloader) ?
Hold "volume down" button and connect with USB cable to the pc.
So first hold "volume down" button and then connect with USB cable to the pc while holding the "volume down" button. Let go the "volume down" when a green led on your phone appears.
You can still enter the "flash mode" if the green led appears.
Hold "volume up" button and connect with USB cable to the pc.
So first hold "volume up" button and then connect with USB cable to the pc while holding the "volume up" button. Let go the "volume up" when a blue led on your phone appears.
If the blue led appears on your phone you can still enter the "fastboot mode".
There is still hope if the green/blue leds appear on your phone (meaning you can still enter "flash mode" / "fastboot mode".
. But the following question need to be answered:
Has your phone an unlocked bootloader?
Sent from my Xperia Z using XDA Free mobile app

pow3rflow3r said:
Can you enter the "fastboot" mode (unlocked bootloader) /"flash mode" (locked bootloader) ?
Hold "volume down" button and connect with USB cable to the pc.
So first hold "volume down" button and then connect with USB cable to the pc while holding the "volume down" button. Let go the "volume down" when a green led on your phone appears.
You can still enter the "flash mode" if the green led appears.
Hold "volume up" button and connect with USB cable to the pc.
So first hold "volume up" button and then connect with USB cable to the pc while holding the "volume up" button. Let go the "volume up" when a blue led on your phone appears.
If the blue led appears on your phone you can still enter the "fastboot mode".
There is still hope if the green/blue leds appear on your phone (meaning you can still enter "flash mode" / "fastboot mode".
. But the following question need to be answered.
It is HARD Bricked. Unresponsive to all of the above w/o any LED response.
Has your phone an unlocked bootloader?
The phone was purchased from Sony and was factory unlocked. It was running fine until the new update from Sony was installed. I believe the update was related to the OS which is 4.4.4.
Thank you.
Sent from my Xperia Z using XDA Free mobile app
Click to expand...
Click to collapse
It is HARD Bricked. Unresponsive to all of the above w/o any LED response.
Has your phone an unlocked bootloader?
The phone was purchased from Sony and was factory unlocked. It was running fine until the new update from Sony was installed. I believe the update was related to the OS which is 4.4.4.
Thank you.

Xperia Z... freeze and brick?

Hey there,
So today I was using my Xperia Z aaaand bam, phone "died".
Battery was at that time 70%, phone was a little bit hot, but in scale of 1 to 10 it was like 6. I had not problems previously with it (besides broken screen that got replaced 3 weeks ago). I was playing a game then suddenly it got closed and my screen got shifted. Like Animation of horizontal menu stucked while going to vertical. I pressed power button many times, I've keept holding it for a short time, long time... nothing. Phone did not respond at all. After 10 minutes it went black. No idea if it went "sleep" or so since power button do not work again.
I tried to reset it with Power + Volume down, Power + Volume up and again, nothing.
I've tried factory reset with Sony Companion but no luck either. Phone is NOT detected by that program.
However, when I plug the phone to PC I hear sound that some device has been found. Phone is presented now as QHSUSB_DLOAD in device manager. I've heard that not a good sign...
When I plug it to PC or Charger nothing happens so I have no idea if phone is getting charged or not.
What even more confusing, when I press power button - nothing, phone is COLD. But when I press Power + Volume down after a while it starts to get warm, after a long time of repeating this really warm.
Any ideas what could I do?
Thanks!

audiofeels said:
Hey there,
So today I was using my Xperia Z aaaand bam, phone "died".
Battery was at that time 70%, phone was a little bit hot, but in scale of 1 to 10 it was like 6. I had not problems previously with it (besides broken screen that got replaced 3 weeks ago). I was playing a game then suddenly it got closed and my screen got shifted. Like Animation of horizontal menu stucked while going to vertical. I pressed power button many times, I've keept holding it for a short time, long time... nothing. Phone did not respond at all. After 10 minutes it went black. No idea if it went "sleep" or so since power button do not work again.
I tried to reset it with Power + Volume down, Power + Volume up and again, nothing.
I've tried factory reset with Sony Companion but no luck either. Phone is NOT detected by that program.
However, when I plug the phone to PC I hear sound that some device has been found. Phone is presented now as QHSUSB_DLOAD in device manager. I've heard that not a good sign...
When I plug it to PC or Charger nothing happens so I have no idea if phone is getting charged or not.
What even more confusing, when I press power button - nothing, phone is COLD. But when I press Power + Volume down after a while it starts to get warm, after a long time of repeating this really warm.
Any ideas what could I do?
Thanks!
Click to expand...
Click to collapse
You phone has locked or unlocked bootloader? If unlocked, give a try to enter Fastboot mode and flash any custom ROM

LaurynasVP said:
You phone has locked or unlocked bootloader? If unlocked, give a try to enter Fastboot mode and flash any custom ROM
Click to expand...
Click to collapse
I havent root or unlock anything :S
Any other idea?

audiofeels said:
I havent root or unlock anything :S
Any other idea?
Click to expand...
Click to collapse
Can you phone enter flashmode ? Does any LED indicator shows up when holding Volume +/- whilst connecting cable in PC (USB)?

N6 power button stopped working, now I can't turn phone on

My power button stopped working a couple days ago but I was still able to wake device with volume buttons. I was worried that if my phone were to shut off I wouldn't be able to turn it back on so I booted into bootloader and was going to try and flash "oem off-mode-charge 0" (which should then make the phone power on when plugged into charger).
At the time I couldn't detect the device using fastboot and as I was searching around on my computer the screen on the phone turned off (was in bootloader at the time). I'm not sure at this point if my phone was on and that both the power and volume buttons were not waking device or if the phone turned itself off.
I have tried the hold the volume down and plug the charger in trick to try and get back into bootloader but nothing happens. When I plug phone into my computer it takes about 20 seconds but I get the little windows ding that something has been connected but phone is still not responsive. I'm starting to think I'm a little screwed here but welcome any input.

You just looking to get the screen to light up so you can implement a way to use the device without the power button? You could try gravity screen or something but first things first...
If its not lighting up on plugin have you tried connecting to a computer and opening ADB and issuing the command adb devices followed with adb reboot. If you wanna go back to bootloader just adb reboot-bootloader. That will restart device so screen is back on and I would turn on the Ambient Display mode so when you pick it up the screen comes on or get a volume power button app or gravity screen app that turns on when you take it out of pocket. Thats all I can suggest and hope any of this helps.

With phone plugged into computer, nothing shows up when I check adb devices or fastboot devices. I guess I'm unsure on what state my phone is in. None of the buttons do anything and nothing happens when I plug my phone into my wall charger (no charge light or screen on). The only response I can get is when I plug the phone into my computer windows makes a noise.
Anyone know what happens when a powered off phone gets plugged into the computer? Does windows make the little noise indicating a device has been plugged in even with it off?

It does not make a noise if its off.. That much I know. Interesting though. Are you sure you have the correct drivers installed for your nexus phone if you are on windows. Go into hardware manager by right clicking on my computer and make sure that its reading it correctly in usb devices without a yellow triangle next to it.

I should have the correct drivers. I just went ahead and reinstalled them through the nexus toolkit. In device manager it says: unknown USB device (device descriptor request failed).
I checked adb devices before all this happened and it displayed correctly. I then rebooted into the bootloader but the fastboot devices command did not show anything. It was shortly after that that the screen turned off. Will the screen normally time out when in the bootloader? I'm wondering if my phone is still in the bootloader with the screen off and both power and volume buttons non functional.

Only thing I can think of is to wait for it to die, then volume down + plug in to pc and when bootloader screen appears issue command fastboot continue and it should boot up. Then get something to remap key or an app. If this all fails after it dies and you restart it assuming debugging wasnt on or its just reading phone as media device of sorts not allowing adb then you may have to get the power button assembly possibly and install it yourself or open the back case and hit the power contact under the button and see if you can get it on. Thats all the ideas I have.
I'd also suggest that after you reinstalled drivers make sure you did a reboot and then plug in the device and also try using a different USB port and or USB cord also as odd as that sounds Ive seen it work before. Im pretty tapped on ideas tho. Do you know if you had usb debugging enabled?

Wireless charger
Sent from my Nexus 6 using XDA-Developers mobile app

Power Button replacement is pretty easy and cheap, there's a Tutorial
On YouTube

coremania said:
Power Button replacement is pretty easy and cheap, there's a Tutorial
On YouTube
Click to expand...
Click to collapse
Ok, cool. I'll take a look.
Managed to get it back into the bootloader this morning. So I guess this is a PSA, if your screen times out while in the bootloader, the volume keys will not wake device so since my power button is broken I couldn't wake it. At that point, the phone is in a state where it cannot receive any fastboot commands, even though it is in bootloader with the screen off. What I had to do was wait overnight for the battery to drain and have the phone power itself off. At this point the volume down plus plug in charger trick worked to get it back into the bootloader with screen on. At that point I was able to 'fastboot reboot' back into system.
Thanks for the insight people

double post

coremania said:
Power Button replacement is pretty easy and cheap, there's a Tutorial
On YouTube
Click to expand...
Click to collapse
It's easy but also annoying. Removing the 18 screws is the most annoying part

clapper66 said:
It's easy but also annoying. Removing the 18 screws is the most annoying part
Click to expand...
Click to collapse
I think the Nexus 6 deserve it

brumby05 said:
I should have the correct drivers. I just went ahead and reinstalled them through the nexus toolkit. In device manager it says: unknown USB device (device descriptor request failed)......
Click to expand...
Click to collapse
Driver issue.
Remove/uninstall the drivers from your PC when the phone is connected.
After that reinstall the adb/fastboot drivers.

N6 - Power mapped to VOL DOWN; turned off and can't get it back on
Hi all, I had to remap my power button - I mapped it to VOLUME DOWN. The other day I voluntarily powered down my N6 at a test center.....and haven't been able to get it to respond since. I do have a Pixel 2 XL on the way - but not that sure I'll want to keep it. The N6 is so sweet.
I've tried holding the volume buttons (POWER and VOLUME UP) for like a minute, but nothing. When I charge it, I see the battery symbol (full) but only for about 5 seconds.
ADB does not see any connected devices. Wug's NRT does not see any connected devices. I'm at a loss and afraid that I've lost my N6 and will have to use the Pixel 2 XL regardless what I think about it.
Any other ideas?

JMacD said:
Hi all, I had to remap my power button - I mapped it to VOLUME DOWN. The other day I voluntarily powered down my N6 at a test center.....and haven't been able to get it to respond since. I do have a Pixel 2 XL on the way - but not that sure I'll want to keep it. The N6 is so sweet.
I've tried holding the volume buttons (POWER and VOLUME UP) for like a minute, but nothing. When I charge it, I see the battery symbol (full) but only for about 5 seconds.
ADB does not see any connected devices. Wug's NRT does not see any connected devices. I'm at a loss and afraid that I've lost my N6 and will have to use the Pixel 2 XL regardless what I think about it.
Any other ideas?
Click to expand...
Click to collapse
Wow - just got my N6 to boot using this little tip I found on Reddit - https://www.reddit.com/r/AndroidQue...ny_way_to_turn_on_phone_without_power_button/
I was holding down the Vol Up and Power buttons (which are both the Volume bar since I remapped my power to Vol Down), but I hit 'enter' on the 'fastboot continue' text in the CMD prompt just after I plugged in the USB and the battery icon came up. It booted into bootloader mode briefly first, then went into system reboot. Whew!

I think your button assembly is broken and I would replace it. You could try the work around in Broken power button, any way to boot? by altarity, post #3.
"Good judgment comes from experience, and a lot of that comes from bad judgment." - Will Rogers

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...

[SM-T510/T515] 2019 Galaxy Tab A 10.1 Hard Resets

Here's a quick reference for how to reboot and reset your 2019 Galaxy Tab A 10.1 (SM-T510/T515) using the hardware buttons:
Force restart:
- If your device is frozen and unresponsive, press and hold the Volume Down + Power keys simultaneously for more than 7 seconds to restart it.
Boot to Recovery Mode:
- Power off the device
- Press and hold the Volume Up + Power keys at the same time.
- Release both keys when you see Recovery Mode.
Boot to Download Mode:
- Disconnect the USB cable
- Power off the device
- Press and hold the Volume Down + Volume Up keys
- Insert the USB cable
Boot to Safe Mode:
- Power off the device
- Press and hold the Power key.
- When the boot logo appears, release the Power key and then press and hold the Volume Down key.
- Continue to hold the Volume Down key until the device finishes restarting.
- Safe Mode will display in the bottom left corner of the screen.
Since there is no Bixby button, these combinations are different than the Galaxy S10. If you know of additional combinations, please contribute to the discussion below and I'll consolidate here.

If there’s no response on your device or you're stuck in a boot loop, then you might need to wait for the battery to drain. The 2019 Galaxy Tab A 10.1 has a non-removable battery pack, so disconnecting that isn't an option. Hopefully, the system reverts to its normal function with a cold boot. This can take time if the battery has high charge left at time of failure. Depending on how fast your battery drains, this can mean waiting for a few hours to several days.
UPDATE: With the right timing, you can break out of a boot loop into Download Mode...but it's tricky:
Insert USB Type C cable connected to your PC
Press and hold the Power and Volume Down keys for exactly 7 seconds (hard reset)
Release the Power key and press and hold both Volume Up & Down keys (enter Download Mode)
If you don't see the blue bootloader unlock warning screen, keep repeating the above two steps
The trick here is that you're trying to time your switch to the Download Mode keys for the exact moment the hard reset takes effect. If you see the boot logo while still holding the first key combination, it's too late. If you switch too early, you won't trigger the hard reset.

I've had to hold down both volume up and volume down while plugging in usb to get the unlock screen to populate. Canadian Wifi variant.

Jambii1987 said:
I've had to hold down both volume up and volume down while plugging in usb to get the unlock screen to populate. Canadian Wifi variant.
Click to expand...
Click to collapse
Thanks, that was an error in my initial post. I was figuring these out by trial and error, but it turns out that our hard resets are basically the same as for the Galaxy M30, which also uses the Exynos 7904 SoC and has no Bixby key.
https://www.hardreset.info/devices/samsung/samsung-galaxy-m30/download-mode/
UPDATE: Also the same as for the Galaxy A30 and some others.
https://www.hardreset.info/devices/samsung/samsung-galaxy-a30/download-mode/

Jambii1987 said:
I've had to hold down both volume up and volume down while plugging in usb to get the unlock screen to populate. Canadian Wifi variant.
Click to expand...
Click to collapse
Yes, I did the same way
US version
1. Enable OEM Unlock
2. Turn the tablet off and unplug the cable
3. Press and hold both volume up and volume down buttons and plug USB cable to host computer
4. You will get wipe screen. Long press volume up to unlock the bootloader.
Now I have to find matching ROM and patch the boot.img and flash.
I believe you have to disable Vault Keeper to keep root intact.

Brand new out the box 11am this morning.
Opened the parcel cool no damage. Powered up fine, had a mess with it, no problems check the speakers were fine and no issues plugged it on charge to 100% took it off and left it for an hour or so, went back to it and physically used it to use Facebook and play candy crush cool no problems. Took a few photos and no problems again. Put it on the side still on near 90% and went back to it 30 minutes later completely off and won’t turn back on, tried charging it nothing no sign of life, tried rebooting it and still nothing. Please tell me that this is not the end and I need to get a replacement... ?*

christina98 said:
Opened the parcel cool no damage. Powered up fine, had a mess with it, no problems check the speakers were fine and no issues plugged it on charge to 100% took it off and left it for an hour or so, went back to it and physically used it to use Facebook and play candy crush cool no problems. Took a few photos and no problems again. Put it on the side still on near 90% and went back to it 30 minutes later completely off and won’t turn back on, tried charging it nothing no sign of life, tried rebooting it and still nothing. Please tell me that this is not the end and I need to get a replacement... ?*
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Have you tried getting into download mode? Or recovery for that matter.

Triscuit said:
Have you tried getting into download mode? Or recovery for that matter.
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I’ve not even been able to get it back on, I’ve attemp a reboot countless of times and still nothing rectifys it. I spoke with Samsung they feel it’s a major fault with the tablet and have told me to request a replacement from my provider or even a refund.

Forgot pattern password, unable to power 510 Tab A off since pattern password is required. How to wipe tab or reset to factory without powering off?

Magendanz said:
If there’s no response on your device or you're stuck in a boot loop, then you might need to wait for the battery to drain. The 2019 Galaxy Tab A 10.1 has a non-removable battery pack, so disconnecting that isn't an option. Hopefully, the system reverts to its normal function with a cold boot. This can take time if the battery has high charge left at time of failure. Depending on how fast your battery drains, this can mean waiting for a few hours to several days.
UPDATE: With the right timing, you can break out of a boot loop into Download Mode...but it's tricky:
Insert USB Type C cable connected to your PC
Press and hold the Power and Volume Down keys for exactly 7 seconds (hard reset)
Release the Power key and press and hold both Volume Up & Down keys (enter Download Mode)
If you don't see the blue bootloader unlock warning screen, keep repeating the above two steps
The trick here is that you're trying to time your switch to the Download Mode keys for the exact moment the hard reset takes effect. If you see the boot logo while still holding the first key combination, it's too late. If you switch too early, you won't trigger the hard reset.
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Ay, thanks i finally got it into download mode, it gave an error at the top left like kernel rev check fail or smth, it was boot looping and with this trick i got it into the bootloader imma flash stock again, THANKS AGAIN!