Database Develop

QHSUSB_DLOAD mode??

Hi everybody,
a friend of mine got his HTC One (black) yesterday and rooted it. He flashed a proper custom ROM on it which I and another one of my work buddy use as well without any issues (InsertCoin). No further flashes done, no other custom kernels, no S-Off, no SuperCID. Just unlocked Bootloader and custom ROM.
He let the device run dry yesterday evening so it shut off itself automatically. He put it on his charger, the phone turned on, he did some surfing and installing apps from the market and set up his alarm. The phone charged over night and he was also able to switch off the alarm this morning.
He got ready for work, got into his car and wanted to switch on the screen on the one for some good tunes. But the screen stayed black.
When I arrived at work, he was a little upset and panicked a little. I thought I was able to recover the device.
After plugging it in to my work computer, the device manager just shows a unknown device called "QHSUSB_DLOAD" so I went to google and looked it up..
Weird thing is: QHSUSB_DLOAD wasnt seen yet on the HTC One (M7) as far as I can see it and it was pretty bad on the HTC One S. It means "Qualcom High Speed USB Download Mode" and on the One S as well as on the Nexus 4 this devices showed up after the bootloader got damaged or the device got stuck in that mode for good.
When plugging the device in (USB / Wall charger) the charging LED doesnt turn on at all, the capacitive buttons dont start to blink while holding down the power button as well.
This thing seems to be gone for good.
But aint it the way that we dont even have any access to the bootloader if its not an official update from HTC? Signature check and stuff? Since the device was rooted, no OTA updates were able to arrive at all. He told me that he didnt try to flash anything after we flashed the custom ROM.
Any advice on that?

Did you even try booting the device first thru hboot/bootloader or holding the power button to force a restart? If you did try connecting the device while on QHSUSB_DLOAD and execute a compatible RUU on your PC. RUU uses android's download mode to flash the ROM so it should be repaired by an RUU.

Already tried, no luck. Tells me the device has not been found.

I am sorry to hear that, man, but from the looks of it your friend now has a paperweight. I'd take it to an HTC service center and hear what they have to say regarding this; of course it will no longer be covered under warranty, but maybe they can fix it for you for a price or something.

Are you sure RUU can't find the phone? If it can't then I guess only a JTAG box can fix it so either send it to HTC for repair or have someone who knows JTAG fix it.
Try4Ce said:
Already tried, no luck. Tells me the device has not been found.
Click to expand...
Click to collapse

I saw this issue on my friend's GS3 once. It was hard bricked and there was no way to recover from what I read (at least on the GS3). I know I saw a thread somewhere here in this forum about the same issue and someone linked to a Sensation thread where there was a way to fix it but I'm not sure if it would apply to the One

Same problem - but the phone magically fixed itself!
I had the exact same problem with my HTC One as described in OP...
My alarm went off in the morning and I set off for work, my battery was low but I thought that I would just charge it when I got to work. I was playing a game (Dungelot) whilst waiting for my bus and was receiving pop up messages about low battery. When it got to 4% left I decided that I would finish the level then close the game down, but as I was just about to finish, the phone went blank...I assumed that I had naturally used up all the battery life and although peeved that I had probably lost my progress in the game, wasn't too bothered.
I got to work and plugged my phone in to charge on my computer. The computer wanted to search for QHSUSB_DLOAD drivers but I thought this must be what it does when my phone isn't switched on and it finds the device. I cancelled the search prompt and tried to switch my phone on...nothing happened.
I tried for the rest of the day, trying to force shut down the bricked phone by holding power in for 30 secs, trying to power into boot mode etc...everything! But the phone would not switch on and the only response I got from it was a little orange LED every now and again and the QHSUSB_DLOAD prompt.
After googling the prompt - I found myself here and REALLY began to sh*t my pants! I've only had the phone less than a month and felt I was tech-savvy enough to flash my phone with a new ROM (Android Revolution HD) to try and get rid of some of the bloatware. I had flashed a new ROM successfully a coupld of weeks before and everything had been fine up that point.
I went home depressed but throught i'd try to plug my phone into a proper mains charger rather than my work's old USB cable (that came with my previous HTC Desire Z) I was going to try a long night of searching the net to try and find a way where I could at least recover the photo's, Zoe's and vids of my new born son but had such a headache that I gave up and went for an early night.
I was woken unexpectedly the next morning by my phone alarm going off! I stopped the alarm and the home just went to Home screen as normal! I don't know how or why these events happened...whether it was the flashed ROM, the game I was playing, the battery running out before the phone could shut down properly, the old USB cable in my work not charging but detecting the device or a combination of all of those, but so far, the phone jumped back into life with the alarm after being charged in the mains all night!
Thought i'd share as it may just help someone else out there who encounters this!

Some phones have miraculously come back from QHSUSB_DLOAD with no explanation of why. Other than that it usually means a hard brick. You can send it to HTC, they will charge you and replace the main board, from what I've heard.
Sent from my HTC One using XDA Premium 4 mobile app
---------- Post added at 08:20 PM ---------- Previous post was at 08:20 PM ----------
Also, its not unheard of. I've seen it happen a few times in these forums.
Sent from my HTC One using XDA Premium 4 mobile app

I wonder if having your alarm set saved you. This phone will actually power itself on so as not to miss an alarm.
Sent from my HTC One using xda app-developers app

lampel said:
I wonder if having your alarm set saved you. This phone will actually power itself on so as not to miss an alarm.
Sent from my HTC One using xda app-developers app
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Click to collapse
Hi Try4Ce,
I am facing the same issue. If your friend's phone is fixed, can you share with me how the fix happened?
Many thanks in advance.
Krishna Menon.

same here
Any idea how to fix it?

Delingerb said:
Any idea how to fix it?
Click to expand...
Click to collapse
Jtag or send it to HTC is the only way.
Sent from my HTC One using Tapatalk

My Solution
Had the same Problem.
My Solution was to Download "HTC One (M7) Toolkit" and force Fastboot.
Pushed Power and Volume Down until Screen was Flashing.
Took about 2 minutes and the Phone was rebooting.
I have no idea what was happening. I have no idea if this helps or works for others. But its worth trying.
Sorry for my bad english.

Try4Ce said:
Any advice on that?
Click to expand...
Click to collapse
CoryTallman said:
Some phones have miraculously come back from QHSUSB_DLOAD with no explanation of why. Other than that it usually means a hard brick. You can send it to HTC, they will charge you and replace the main board, from what I've heard.
Click to expand...
Click to collapse
bkmenon said:
Hi Try4Ce,
I am facing the same issue. If your friend's phone is fixed, can you share with me how the fix happened?
Many thanks in advance.
Krishna Menon.
Click to expand...
Click to collapse
Delingerb said:
Any idea how to fix it?
Click to expand...
Click to collapse
This is some kind of mode that is enabled when you hold power on button when the device battery is completely drained. i.e. when you try to turn device on it will not boot up (Special I was connected to usb cable via PC to charge my phone NEXUS 4 when I get into this mode). I saw a similar mode where nvflash commands are executed something like APX(can't recall correctly) with Tegra 4 device (that time also I was connected with a usb cable and charging the tablet when it was completely drained!). A simple solution to quit this issue is DO not Panic and let the device get a little charge. After that boot normally with the power button. In case if it didn't try other modes to enter such as recovery or fastboot reboot commands if your device is getting recognised..

QHSUSB DLOAD means its a hard bricked phone, No amount of messing about with it will fix it, Send it to a service centre, it will probable have to have the motherboard replaced..Sorry

My device entered in QHSUSB_DLOAD mode after the 4.4 ota was installed and 30 minutes later, I was able to turn up the phone. It restarted itself like 5 times and then it was normal. Miracle..

danielr18 said:
My device entered in QHSUSB_DLOAD mode after the 4.4 ota was installed and 30 minutes later, I was able to turn up the phone. It restarted itself like 5 times and then it was normal. Miracle..
Click to expand...
Click to collapse
What do you mean by "force"? What did you do exactly?

My device wouldn't do anything, and it was in QHSUSB_DLOAD . But when I later pushed the power button for a minute, it worked.

danielr18 said:
My device wouldn't do anything, and it was in QHSUSB_DLOAD . But when I later pushed the power button for a minute, it worked.
Click to expand...
Click to collapse
mine spent the night carrying on waking took the charger and the green light for continued access, tried to turn it on but could not. After reading your response, I tried to hold the power button for longer. After 15 seconds the phone rang and the light came on, everything works perfect so far

Today while I was updating firmware phone gone to QHSUSB_DLOAD mode.
I am guessing it's end of road. :crying:

[Q] Hard briked S3 mini out of nowhere

I have the feeling I'm going to get repetitive here guys, but I've been reading the troubleshooting threads for over an hour and couldn't find an answer to help me.
Last saturday I was to lazy to move from the couch, so I watched as my S3 Mini ran out of battery. I got the "phone is turning off" screen as usual. Later I went to bed, but as I needed my alarm to go off in the morning I tried turning it on again, and nothing* happened. Plugged it on the wall, nothing*. Replaced the battery, nothing*. Gave it a good half hour plugged, and as you can guess, nothing*.
* when I say nothing, I mean it won't light up, won't vibrate, won't wink for me, won't load any kind of error, it's actually just like if you were trying to turn on a phone without any battery connected, no grasp of life comes from its poor soul.
The only moment I could see some action on the device is when I tried connecting it on the PC a few hours ago, as it installed drivers to Windows. Right after installing the drivers however, it won't show in the file explorer. I've tried to detect it with a few development tools such as ORT and Odin and there was no sucess either. Download or Recover mode will not work as well.
One thing I think worth mentioning, is that ever since I rooted it a couple of years ago, whenever I tried to recharge it while it was off, the standard "green charging battery" would never appear. What would appear on the screen was a freezed loading icon (the one that keeps roling again and again, but frozen). This particular issue never came off, even reseting it or installing new ROMs.
I always used Maclaw's, some of the latest 4.x, because I tought the 5.x was to heavy for the s3 minis.
I've read some about USB JIGs and stuff, but what makes me very curious is what the heck?! The phone was working just fine, the battery runs out and I have a brick? Is this possible? Can anyone tell me any work around?
I apologize for possible grammar mistakes.

ScrewedImei said:
I have the feeling I'm going to get repetitive here guys, but I've been reading the troubleshooting threads for over an hour and couldn't find an answer to help me.
Last saturday I was to lazy to move from the couch, so I watched as my S3 Mini ran out of battery. I got the "phone is turning off" screen as usual. Later I went to bed, but as I needed my alarm to go off in the morning I tried turning it on again, and nothing* happened. Plugged it on the wall, nothing*. Replaced the battery, nothing*. Gave it a good half hour plugged, and as you can guess, nothing*.
* when I say nothing, I mean it won't light up, won't vibrate, won't wink for me, won't load any kind of error, it's actually just like if you were trying to turn on a phone without any battery connected, no grasp of life comes from its poor soul.
The only moment I could see some action on the device is when I tried connecting it on the PC a few hours ago, as it installed drivers to Windows. Right after installing the drivers however, it won't show in the file explorer. I've tried to detect it with a few development tools such as ORT and Odin and there was no sucess either. Download or Recover mode will not work as well.
One thing I think worth mentioning, is that ever since I rooted it a couple of years ago, whenever I tried to recharge it while it was off, the standard "green charging battery" would never appear. What would appear on the screen was a freezed loading icon (the one that keeps roling again and again, but frozen). This particular issue never came off, even reseting it or installing new ROMs.
I always used Maclaw's, some of the latest 4.x, because I tought the 5.x was to heavy for the s3 minis.
I've read some about USB JIGs and stuff, but what makes me very curious is what the heck?! The phone was working just fine, the battery runs out and I have a brick? Is this possible? Can anyone tell me any work around?
I apologize for possible grammar mistakes.
Click to expand...
Click to collapse
try to plug in the phone into charger & leave it there like 20 mins or more. battery loads then.
then try access samsung download mode, if you cant the phone is probably useless (brick for ever) because itslike mthe last standing thing.
& sorry i say that but thats typically samsung behaviuor. there allways this kind of threads in the samsung forums of xda... other manufacturer can mostly be restored or atleast you know what make it dead.

Exactly the same problems happening to me.
This is my thread:
http://forum.xda-developers.com/galaxy-s3-mini/help/sgs3-mini-dead-t3085031
Can you try to follow what appears on this link? (I can't by now because my PC is broken)
I think won't do nothing because you won't be able to access to the recovery mode on android, as me, but to try...
http://forum.xda-developers.com/showthread.php?t=1840030

bejunk said:
try to plug in the phone into charger & leave it there like 20 mins or more. battery loads then.
then try access samsung download mode, if you cant the phone is probably useless (brick for ever) because itslike mthe last standing thing.
& sorry i say that but thats typically samsung behaviuor. there allways this kind of threads in the samsung forums of xda... other manufacturer can mostly be restored or atleast you know what make it dead.
Click to expand...
Click to collapse
Hi there,
Thank you for your interest but I have passed this point already. Tried a brand new battery I had laying down in the drawer (which was fully charged with an universal charger) and there is no answer to any attempt of turning it on. Via recovery, download or normal boot.
CrashOverride93 said:
Exactly the same problems happening to me.
This is my thread:
http://forum.xda-developers.com/galaxy-s3-mini/help/sgs3-mini-dead-t3085031
Can you try to follow what appears on this link? (I can't by now because my PC is broken)
I think won't do nothing because you won't be able to access to the recovery mode on android, as me, but to try...
http://forum.xda-developers.com/showthread.php?t=1840030
Click to expand...
Click to collapse
Hello there,
I'm sorry to hear I'm not the only one affected by this bug (lets call it a bug). This shows there is a lack of concern from Samsung on dealing with this issues, and thus we see that old programmed obsolescence.
I will try that later on the weekend, and I come back here with an report.
Cheers

ScrewedImei said:
Hi there,
Thank you for your interest but I have passed this point already. Tried a brand new battery I had laying down in the drawer (which was fully charged with an universal charger) and there is no answer to any attempt of turning it on. Via recovery, download or normal boot.
Hello there,
I'm sorry to hear I'm not the only one affected by this bug (lets call it a bug). This shows there is a lack of concern from Samsung on dealing with this issues, and thus we see that old programmed obsolescence.
I will try that later on the weekend, and I come back here with an report.
Cheers
Click to expand...
Click to collapse
this guide useless for you. how u want flash things with odin if u cant enter download mode at all??
im really sorry for you that this phone is dead. just can give you 1 advice, dont buy samsung in future.

I have been repaired my phone successfully!!!
I just needed to change two capacitors on its motherboard, and that's it.
Here the video where I have found the info and how to do that. It's in Spanish but easy to understand for you I think. But if you need some help, send me a PM.

can you take a picture from the location of the 2 capasitors and the types of it

Hi everyone.
I have some news. It took me a while but I followed CrashOverride93's advice on that video. It actually solved one issue, as I now can turn it on, but now I have a second problem, I'm stuck on a boot loop, with acess to Download mode ONLY. No recovery.
Considering where my issue started, and where I am now, I have tried the following:
- Flashed via Odin stock ROM, kernel;
- flashed Wipe;
- flashed PARAM;
- three button combo.
So far I couldn't get it pass the boot loop. Any thoughts?

Lumia 620 Romania - stuck on NOKIA logo with red background

Hello to everyone!
I have read everything I could find and tried a long list of things but unfortunately I am at a loss.
So I've come to you, as I can see that here there are a lot of people that have been through a lot.
Long story short: my Lumia 620 had Windows 8.1 GDR2 on it. Some cool thought said: install Windows 10 Insider Prev.
Well it installed, but I then wanted to revert. I first tried to do a hard reset using the button combination and the phone got stuck on the spinning gears.
I managed then to get the phone into the thunder logo mode. Unfortunately Windows Phone Recovery Tool did not recognize my phone.
There were a lot of tries until i came across the way with Nokia Product Support Tool.
So I did what was said there. And my phone got to reboot into a red background with NOKIA logo and a progress bar. It made it to the first quarter and then Nokia Product Support gave an error. I tried restarting the program, the phone, etc... only God knows what I did not try...
Now my phone is stuck at the NOKIA logo with red background and will not be seen either by Thor2, PST, WPRT and I can't even find it in the device manager.
WHAT ELSE CAN I TRY?!
LATER EDIT: I know why it died now.
I recently did the same thing with another 620, but this time the battery was full. I think that the other phone's battery died in the process of rewriting the firmware thus resulting in a hard brick. - mystery solved.

flash your phone
same problem with my lumia 620....flash your phone

Yay, I didn't think of that!
But seriously, I can't - the PC doesn't recognize it at all.
aqibpk said:
same problem with my lumia 620....flash your phone
Click to expand...
Click to collapse

ashesofpain said:
Yay, I didn't think of that!
But seriously, I can't - the PC doesn't recognize it at all.
Click to expand...
Click to collapse
check device manager, does it flick when you connect the phone?
use a usb viewer to uninstall all the drivers related to your phone.

surya467 said:
check device manager, does it flick when you connect the phone?
use a usb viewer to uninstall all the drivers related to your phone.
Click to expand...
Click to collapse
h t t p:// s27.postimg.org/x858v1rhf/Capture4.png
It flicks only when the phone is off, or the battery is out.
As soon as the phone starts up and shows NOKIA in white over red background, nothing exists in Device Manager related to the phone.

ashesofpain said:
h t t p:// s27.postimg.org/x858v1rhf/Capture4.png
It flicks only when the phone is off, or the battery is out.
As soon as the phone starts up and shows NOKIA in white over red background, nothing exists in Device Manager related to the phone.
Click to expand...
Click to collapse
use some usb viewer..uninstall all drivers related to ur phone...reinstall Nokia usb drivers.Restart computer. Try again..u could do a manual dead phone flash with product support tool.

LATER EDIT: I know why it died now.
I recently did the same thing with another 620, but this time the battery was full. I think that the other phone's battery died in the process of rewriting the firmware thus resulting in a hard brick. - mystery solved.

Yes, but can be reflashed

How can it be reflashed?
Can you do a how-to guide?
augustinionut said:
Yes, but can be reflashed
Click to expand...
Click to collapse

Yes you can reflash with nokia flash tool

Turn off your phone.
Note If your phone is currently stuck on the manufacturer's logo, try removing the battery to turn it off.
Disconnect your phone from the USB cable.
Hold down the camera button.
Continue holding down the camera button and connect the USB cable between your phone and computer.
Continue holding down the camera button until you see the connect-to-computer screen.
Release the camera button.
Leave the phone restart alone, will take around 4/5 minutes.
I hope this will surely works for you, if not then visit Nokia Lumia 620 Manual- guideusermanual.com/product-name-lumia-620-manual&po=672223&lang=English for help.

Idol4S (Android) - No power, blinking LED

Hello everyone,
Having major issues with my Idol4S. It is the unlocked version (Cricket). It was working just great until a few days ago when I plugged it into the car charger. Phone instantly shut off, and got stuck with a blinking (rapid) LED light. This happens if plugged into my PC, or my Alcatel charger (both the wall and car).
The phone has suffered no damage (had a cover, but it was never dropped or exposed to external weather damage, nor water - I took great care of it), and was working quite well. I'm unable to boot it into any sort of recovery mode (as the screen is black, so I wouldn't be able to see anything anyways). The only indication of life is the flashing LED when plugged in ..(charging loop, maybe?)
I am using my idol4S Win10 (TMO/unlocked) phone in the meantime, but the base model was working just fine before this happened. I was also mindful of checking voltage/Amps when using chargers, so I would not have exposed it to any incorrect input/output. QuickCharge worked great too (sorely missed on Win10 model).
The phone was never rooted so it has the stock ROM, and whatever the last update Alcatel had pushed out for it. I did have developer mode and USB debugging on for MSVC/NSDK.
Is there anything I can do? After awhile being plugged in, the LED shuts off. I kind of need it as I was porting my game engine to it (using the SDK), plus it was my primary. I love the Win10 version too, but the Android idol4S was my primary phone. Kind of disappointed in Alcatel - I read it doesn't have an external battery otherwise I would attempt to transplant the battery (if that is even the issue). . .
Any tips, advice, or suggestions would be greatly appreciated! <3

what you describe is what the phone does when it's plugged into the PC in download mode. Since you have the Cricket version which is also what I have, it is very easy to start from scratch and reflash everything. I have released a newer version TWRP and also have the ~CricketRom~ available if you're interested.

PizzaG said:
what you describe is what the phone does when it's plugged into the PC in download mode. Since you have the Cricket version which is also what I have, it is very easy to start from scratch and reflash everything. I have released a newer version TWRP and also have the ~CricketRom~ available if you're interested.
Click to expand...
Click to collapse
Okay, but would it work even though the phone gives no indication of being plugged in to the computer, or the chargers for it? I plugged it into the PC just now, brief flash of light and then nothing. .
Should mention again that the screen does not turn on, ever since that day, the screen has not came back on -- so I really can't do anything, even accessing 'download mode' does not show anything on-screen, nor does Windows 10 alert me of the USB device being connected.
I wouldn't mind starting from scratch at this point. I'm definitely interested in getting up and running again! It's not like I can do anything else at this point except spend money and get it repaired by TCL.
Would it be rude of me to ask for links to the TWRP/CricketROM from you? Maybe a quick-start guide, I pick up on things easy, but I've never properly flashed with TWRP =)
Also @PizzaG, THANK YOU for your help!! Definitely appreciated <3
Oh! @PizzaG, I also have an older Onetouch Idol 3 that has the _exact_ same symptoms, I wonder if that too could be recovered? ... ^__^

well I guess the first thing to do would be plug it into the PC. Hold volume+ and volume- then hold power until you feel the buzz and let go of power. Hopefully you get the red Download mode screen? I didn't realize it had no life at all, I thought it was just messed up. It's sounding like more may be wrong then just a simple reflash.
New TWRP and ~CriketRom~ Beta5: https://forum.xda-developers.com/idol-4s/development/rom-twrp-recovery-t3792659

Samsung Galaxy A71 died after updating to Android 11

Ok, so here is to explain what happened, so you can have a clue what am I talking about.
I bought Galaxy A71 a month ago (give or take), so out of the box it had Android 10. The phone was working flawlessly. Battery life awesome, pictures from camera great, etc. So, few days ago on March 26, 2021, an update to Android 11 came in. I am a tech nerd, I know about phones, rooting, flashing, etc.
So, I saw that I have around 78-80% of the battery so it was enough to download and install Android 11.
Downloading and installing and optimizing apps after went smooth as silk. I usually soft restarting my device after any software update, so I did that after the installation of Android 11 was entirely finished.
But, this is what happen when I restart my phone the normal way. I press and hold the power button, the dialog of Power off, Reset and Airplane mode came out, tapped twice the reset button and phone went restarting and just.... died. I remember that when I soft restarted my phone, the battery was on 72%. So I tried any trick in the books to turn on my phone again like combinations of pressing buttons, then with USB cable, charger, etc, but nothing was responsive. It's like the phone was clinically dead.
My phone is still under warranty and I will probably end up taking it to the T-mobile store, but the point of this thread is to inform others of the situation like mine and see if someone else had the same problem?
Maybe someone will post a solution what to do in situations like this?
If I find any solution, I will update this post with all the details.

You probably done it.But have you plugged it into A computer to see if the computer can detected it?

Essex_Hal said:
You probably done it.But have you plugged it into A computer to see if the computer can detected it?
Click to expand...
Click to collapse
Yes i did, nothing shows in Device Manager. As I said, I tried every possible trick to wake the phone up, but it was unsuccessful.
I end up taking it to the carrier store cuz it is still under warranty. They told me if they can't fix it, they'll probably give me a new one or to wait for Galaxy A72 To arrive in 2 weeks. We'll see what happens.

BorisMKD said:
Yes i did, nothing shows in Device Manager. As I said, I tried every possible trick to wake the phone up, but it was unsuccessful.
I end up taking it to the carrier store cuz it is still under warranty. They told me if they can't fix it, they'll probably give me a new one or to wait for Galaxy A72 To arrive in 2 weeks. We'll see what happens.
Click to expand...
Click to collapse
Least you still have A warranty to help you.
Good luck with it.Hope you don't lose your data if it's still on the phone.

Essex_Hal said:
Least you still have A warranty to help you.
Good luck with it.Hope you don't lose your data if it's still on the phone.
Click to expand...
Click to collapse
They fix it, it said it was software problem, got stuck on rebooting. I get it today (2 weeks later) and it worked. They managed to turn it on but without a factory reset, every app was there, every picture, video, contacts, call history, etc. I don't know how they did it, but they did. So when I got my phone back I tried to restart it normal way, long press of the power button, then tap Restart and again restart. The phone restart it without a problem. I was happy. Then later that day (2 hours ago when I'm writing this, I notice that always on display when i touch the phone screen will show up but doesn't switch off after 10 seconds (I set it up like that), instead it started to blink in intervals like i was touching the screen continuously. Then I did a deep soft reset. You know, when you press Volume down and Power button at the same time and.... got the same problem again. Phone is non functional, none combination of pressing buttons worked, just like i describe it in the OP. Just for information, I did the same on my previous phone Galaxy A7 2018 and never had this problem. I did it on this phone too, never had a problem. Then I remember it that on both phones when i do that and not having problems were running on Android 10. this phone now update it to Android 11 and that buttons combination is probably bricking the phone. It's just a thing I notice. So I am planning to call the official service that fixed the phone how did they do it, so maybe I can do it myself too. I don't want to wait for another 2 and a half weeks.

I am facing the same issue. And I think my warranty is out. Did you get to ask them how can you turn it on yourself!!
I would really appreciate some help here!

BorisMKD said:
Ok, so here is to explain what happened, so you can have a clue what am I talking about.
I bought Galaxy A71 a month ago (give or take), so out of the box it had Android 10. The phone was working flawlessly. Battery life awesome, pictures from camera great, etc. So, few days ago on March 26, 2021, an update to Android 11 came in. I am a tech nerd, I know about phones, rooting, flashing, etc.
So, I saw that I have around 78-80% of the battery so it was enough to download and install Android 11.
Downloading and installing and optimizing apps after went smooth as silk. I usually soft restarting my device after any software update, so I did that after the installation of Android 11 was entirely finished.
But, this is what happen when I restart my phone the normal way. I press and hold the power button, the dialog of Power off, Reset and Airplane mode came out, tapped twice the reset button and phone went restarting and just.... died. I remember that when I soft restarted my phone, the battery was on 72%. So I tried any trick in the books to turn on my phone again like combinations of pressing buttons, then with USB cable, charger, etc, but nothing was responsive. It's like the phone was clinically dead.
My phone is still under warranty and I will probably end up taking it to the T-mobile store, but the point of this thread is to inform others of the situation like mine and see if someone else had the same problem?
Maybe someone will post a solution what to do in situations like this?
If I find any solution, I will update this post with all the details.
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have same issue too anyways to fix it?