Help recovering SM-T285 - Samsung Galaxy Tab A series Questions & Answers

Hi
I have a device which is managed by an MDM called SOTI Mobiconrtrol.
My client has been asking for some changes to the lockdown/kisok mode, one of which has resulted in complete loss of connectivity. The device just states 'the process com.android.phone has stopped'
I am unable to manage the device from SOTI because it cannot connect.
The policy also prevents the end user from accessing Settings and on top of this it's low on space.
So I'm in a position where it would appear I've bricked a customers tablet and he wants it back like last week.
I feel that the only way to get past the now not-talking MDM is by root but, I can't unlock the bootloader nor can I enable ADB.
Tried ODIN but I'm proper stuck.
Any advice?

Ryzler13 said:
He wanted it back last week August 2018...
Can you access their files to save them/back them up?
After that...
I spent hours looking for solutions and combinations to make this work, even gave up on it and left the phone sitting around for month, I picked it up again the other day....
This worked for me. T285
Google search and DOWNLOAD:
USB Drivers
(Samsung USB driver 1.5.27.0)
Firmware
T285XXS0ARJ3 (Sammobile dot com)
Odin3
Odin 3.13.1 (odin3.en.lo4d dot com)
Steps:
Install USB Drivers
Open Odin
Plug in your phone
50% Charge or more
Press Home, Vol Down, Power from the OFF state
"WARNING A custom OS can cause Critical issues"
"Volume up to Continue"
Press Volume Up
Check Connection with Odin (top left, Green, Com3)
Load AP and BL Only
Press Start
You're Welcome
Click to expand...
Click to collapse
Why do you keep posting this in every thread?
Did you even read the post above? Simply reinstalling the firmware isn't going to solve the issue which is 7 months old any way.

Related

Killed my phone, still in warranty - or not ? please help !

Hi all !
I have a Samsung A8 (model SM-A800F) which was working great. I ran Kingo Root to try to install Youtube ad free. The next time I restarted it, it didn't load, and restarted in an endless loop to where "Samsung" logo appears (then restarted again). I booted into System Recovery and chose to reset to factory, but it didn't help. Then I tried flash it using Odin in Download mode. I installed the Windows drivers, downloaded the 6.0.1 firmware for Vietnam (where it was purchased), loaded the file into the AP field, and once verified clicked Start. The progress was frozen when reaching mid-way every time I tried, until it said "an error occured while updating the device software. Use the Emergency recovery function in the Smart Switch PC software"...
I downloaded Smart Switch and installed in Windows, but the drivers were not able to install correctly, and failed on the component referring to the ID or something... while Modem driver was installed correctly and the phone appeared in Device Manager. Smart Switch didn't recognize my phone and said "unsupported device".
Now I cannot get the phone stay constantly ON, and the screen shuts down and loads in an endless loop, to the "Error occured" screen... When trying to boot to the ODIN Download page, it loads, I press UP for Continue, and then it again shuts down and loads to "Error Occured".
I tried to charge over night but it didn't help. It does the same thing when the phone is connected to the charger...
However it seems that by IMEI it is sill under warranty. I'm not sure if I voided it :/
Here's what the Download mode page says:
ODIN MODE
PRODUCT NAME: SM-A800F
CURRENT BINARY: Samsung Official
SYSTEM STATUS: Official
FAP LOCK: ON
Secure Download: Enabled
KNOX WARRANTY VOID: 0
AP_SWREV: 1
Would appreciate any help, this phone is almost new but now it's dead :/
Your warranty is not voided. Your Knox E-Fuse still intact.
Also this is for S8 not A8 forums.
Paradoxxx said:
Your warranty is not voided. Your Knox E-Fuse still intact.
Also this is for S8 not A8 forums.
Click to expand...
Click to collapse
Thanks,
I just couldn't find any A8 forum, and thought there would be more people here who can help.
Would appreciate any help on this... thanks in advance
wurlitzer99 said:
Thanks,
I just couldn't find any A8 forum, and thought there would be more people here who can help.
Would appreciate any help on this... thanks in advance
Click to expand...
Click to collapse
No worries, your phone is not dead.
Try to find a firmware that correspond to the one you got :
http://updato.com/firmware-archive-select-model?exact=1&q=SM-A800F
and use ODIN : http://dl.sammobile.com/Odin3-v3.12.7.zip
You should be good to go.
EDIT : Also for that error occurred thing, try to be faster than it by starting odin flash before it appears.
Thanks,
The problem is that neither the error nor the Odin page would stay on for more than a few seconds. Once they appear, the screen would go dark after 5-10 seconds and then the "error" page would load again (after being darks for another 10 seconds or so). So I can never have ODIN or Smart Switch connecting to the device (the drivers won't connect in Windows)... making it impossible to upload any firmware.
wurlitzer99 said:
Thanks,
The problem is that neither the error nor the Odin page would stay on for more than a few seconds. Once they appear, the screen would go dark after 5-10 seconds and then the "error" page would load again (after being darks for another 10 seconds or so). So I can never have ODIN or Smart Switch connecting to the device (the drivers won't connect in Windows)... making it impossible to upload any firmware.
Click to expand...
Click to collapse
Could you take a picture of that error ? I've never heard/seen such thing
Hi, thanks for the help !
The error is this:
http://statics1.grupoandroid.com/up...1850.jpg.d2bb2a8b77e4fba5fc6467f3d1547886.jpg
I *think* I have some direction... here's what I did/found:
- I installed Smart Switch on my Mac, and chose "Reinstall Device Driver" from the menu. Then restarted the MAC
- I loaded Smart Switch, and Chose "Emergency Software Recovery and Initialization". Then chose the "Device Initialization" tab
- Added the model number "SM-A800F" and the device's serial number (which are physically written on my device).
Smart Switch determined the firmware version to be used for initialization, as:
PDA:QC3 / PHONEG3 / CSCH4(XXV)
- Smart Switch asked to:
1. Power the device down
2. Load recovery mode by pushing Power+Vol Down+Home, then connect the device to the MAC and choose "Continue" to start the initialization...
The problem/s:
My device won't turn on at all, if I do not connect it to either the charger or the MAC (which acts as a supply source?) - which makes me think the battery is fully drained ? i.e when not connected at all, it won't power on.
But when connected to either the charger or MAC, it would bootloop endlessly. i.e it will load the "error" page mentioned above, shut down itself, reload again, shut down and so on.
(I have to mention, that when I first noticed the bootloop, I reset everything to factory settings, cleared cache etc, and it still bootlooped on the Samsung logo).
If when it shuts down during the loop, I push Power+Vol Down+Home, it would boot to ODIN recovery page, where I can push UP for the Download page, but it will still reboot and will again load into the "error" page, which will again reboot endlessly. If I take the charger off the device, it powers off and won't load with any combination of button push.
I also cannot just make it shut down when the charger is connected, using any of the possible button combinations...
I wonder:
- Is there there's a problem which prevents the battery from being charged at all ?
What's strange is that the original problem which made me get into this whole issue, was that is was endlessly booting to the "samsung" logo - but when I booted to System Recovery or Download/ODIN modes, it stopped rebooting endlessly and stayed on... it was also showing the charging indication when powered off... the battery was charging well ever since.
- Why would it bootloop when connected to the charger ? is it possible that the bootloader went bad during my attept to install firmware using ODIN ? I know it always went through the boot.img and recovery.img successfully and only got stuck at about 50% when installing system.img...
I think the current bootloop problem began only once the battery ran out of power. But why wouldn't it charge at all now ??? It's supposed to still charge in this state, isn't it ?
wurlitzer99 said:
Hi, thanks for the help !
The error is this:
http://statics1.grupoandroid.com/up...1850.jpg.d2bb2a8b77e4fba5fc6467f3d1547886.jpg
I *think* I have some direction... here's what I did/found:
- I installed Smart Switch on my Mac, and chose "Reinstall Device Driver" from the menu. Then restarted the MAC
- I loaded Smart Switch, and Chose "Emergency Software Recovery and Initialization". Then chose the "Device Initialization" tab
- Added the model number "SM-A800F" and the device's serial number (which are physically written on my device).
Smart Switch determined the firmware version to be used for initialization, as:
PDA:QC3 / PHONEG3 / CSCH4(XXV)
- Smart Switch asked to:
1. Power the device down
2. Load recovery mode by pushing Power+Vol Down+Home, then connect the device to the MAC and choose "Continue" to start the initialization...
The problem/s:
My device won't turn on at all, if I do not connect it to either the charger or the MAC (which acts as a supply source?) - which makes me think the battery is fully drained ? i.e when not connected at all, it won't power on.
But when connected to either the charger or MAC, it would bootloop endlessly. i.e it will load the "error" page mentioned above, shut down itself, reload again, shut down and so on.
(I have to mention, that when I first noticed the bootloop, I reset everything to factory settings, cleared cache etc, and it still bootlooped on the Samsung logo).
If when it shuts down during the loop, I push Power+Vol Down+Home, it would boot to ODIN recovery page, where I can push UP for the Download page, but it will still reboot and will again load into the "error" page, which will again reboot endlessly. If I take the charger off the device, it powers off and won't load with any combination of button push.
I also cannot just make it shut down when the charger is connected, using any of the possible button combinations...
I wonder:
- Is there there's a problem which prevents the battery from being charged at all ?
What's strange is that the original problem which made me get into this whole issue, was that is was endlessly booting to the "samsung" logo - but when I booted to System Recovery or Download/ODIN modes, it stopped rebooting endlessly and stayed on... it was also showing the charging indication when powered off... the battery was charging well ever since.
- Why would it bootloop when connected to the charger ? is it possible that the bootloader went bad during my attept to install firmware using ODIN ? I know it always went through the boot.img and recovery.img successfully and only got stuck at about 50% when installing system.img...
I think the current bootloop problem began only once the battery ran out of power. But why wouldn't it charge at all now ??? It's supposed to still charge in this state, isn't it ?
Click to expand...
Click to collapse
Hmmm, the thing is, the battery charging process is actually held on some kind of "mini-boot" OS on Samsung I believe, where the phone boots into a certain state, with that said mini-os to display the battery charging info and this kind of things.
My guess is that you *might* have, or more likely your phone did corrupt the flash at some point for x or y reason.
What I'd do is :
Let the phone on a charger a whole night doing its bootlooping thing. And see from there if the battery would charge.
I'd try another computer with Odin just to be sure something is not triggering the reboot process at some point.
And if all the above fails, you still have the warranty, so beside time, you would not be losing any money..
I'm going to write a long post. But I believe it will help a lot of people having a similar problem.
Long story short - problem solved! but it took much of my nerves (and time).
I'll start with the "warranty". The so-called Samsung "warranty" which basically worths nothing!
Calling Samsung international service center, they "informed" me that I must contact Samsung Vietnam, where I bought the device, although I am not there anymore... Needless to say the local dealer in my country refused to take care of this situation, saying Samsung's warranty is regional based, rather than international... which means, only Samsung in the original country where the device was sold in, are responsible for the warranty (and therefore repair!). I had a chat with a Samsung Vietnam representative, who just kept saying "I'm sorry", and refused to let me sent the device out to them for repair! asking me to "bring it to them", although I noted him a few times that I bought it as a tourist and I am not in Vietnam anymore.... Thank you Samsung !! From now on every traveler in the world will know they basically have NO WARRANTY if they buy any Samsung device in a "foreign" country while traveling abroad!
Now for the solution:
I started by letting the device staying connected to the charger overnight, which didn't help. With the OS now installed, I realize that the battery was NOT CHARGED ! it was completely drained, although connected to a charger for long hours... So, know from now on that if your boot data is corrupted, it may cause the device NOT TO CHARGE THE BATTERY at all. Luckily, my desktop PC could use the device while connected to it although the battery was empty, until the problem was sorted out. I did get a crash on my MAC tough (Log said it was USB related), while using Smart Switch, so one option is that it could not supply enough power to the device to keep it keep working at all, or working correctly... So my suggestion is to use a desktop Windows PC in this case, which can potentially provide more power to a device with 0% battery power.
After scratching my head, and considering removing the front panel for replacing the battery (a very risky procedure) I decided to keep on investigating....
I followed a youtube video who suggests that you should install Smart Switch on a PC, choose "reinstall driver" from the menu, restart the PC, then use Emergency Recovery and Initialization, enter the phone model number in the search box (as appearing on the back of the device) , and once it recognizes the model, also to enter its serial number. Here's the video:
https://www.youtube.com/watch?v=1yXQUFrEWg4
This basically brings up a popup message saying Smart Switch detects a compatible firmware for this device, and is about to download and install it. It then asks the user to do the Power+Vol Up+Home push combination trick + pushing UP once the page is loaded in order to "Continue" and bring up the ODIN Download screen, which worked for me if did that as soon as the device shuts down (in the middle of the bootloop). As I couldn't make it load at all with no charger connected, I had it connected to the charger, and once I saw the Smart Switch message asking to do the push combination, I quickly connected it to the computer using another cable which was already connected to the PC USB port on its other end.
Somehow, I could at last make Smart Switch finally start downloading the firmware from the web, and the device again disconnected (bootlooped), but luckily Smart Switch didn't care about it disconnecting, and kept on downloading the firmware. At about 85% of the progress bar state, I could find the downloaded firmware on the temp folders, which are described in this thread:
http://forum.gsmhosting.com/vbb/f777/samsung-firmware-download-belongs-his-serial-number-2038404/
I had to make sure it wasn't still downloading, and watched the "last modified" state of the file to make sure they are not being downloaded anymore. CAUTION: although the AP was not downloading anymore, I know it was probably not good as ODIN couldn't verify it when I tested it. USE ONLY SMART SWITCH !
I quickly copied the folder to which the app extracted the BL and AP files it downloaded, and finally had an officialy bootloader (BL) image, which I could use in ODIN in order to reupload a correct, "official" bootloader to the device....
I hoped the device won't bootloop in the middle, but luckily ODIN was fast enough to send the image successfully, with a "PASSED" status, and the device booted with a nice "Samsung" logo directly to a System Recovery page!
What I exactly did, was loading ODIN, then loading ONLY the BL file into the BL field in ODIN, having it verifying it, and once verified I connected the device, and as soon as ODIN recognized it, pushed START. It managed to upload the image into the device in a few seconds! It seems then, that the bootloop was not caused by a bad battery, but as a result of a corrupt upload of an AP image through ODIN - or because I possibly was using an incorrect version when I tried to upload an AP files to the device on my first attempt to flash it.
Note that I did search for the correct, compatible AP file, by country and model (on Sammobile) but it didn't' work (stuck at 50% in ODIN) ! so I really suggest everyone TO ONLY USE SMART SWITCH if they want to be sure that the correct firmware is being used, and avoid similar situations...
I then deleted the temp files from the PC (the actual ones which were in the temp folder), reinstalled the drivers from inside Smart Switch (just in case), booted the device to Download mode (WHICH DIDN'T BOOTLOOP this time), let Windows installing the drivers (checked in Device Manager), then restarted the PC, and ran Smart Switch again. I repeated the procedure of loading Emergency and Initialization, entering the model and serial number, having it fully downloading the firmware (again) from the web, and installing the firmware into the device. This time it completed the process, and I finally had the device installing and booting into a fresh version 6.0.1 of Android!
Hope it helps!

Bricked J3 2016 (SM-J320FN)

Hey there, I think my J3 2016 is bricked.
I accidently disabled the "OEM Unlock" in Developer Settings and now I am stuck at the samsung boot screen with a green text in left upper corner saying "Custom Binary blocked by FRP Lock".
I tried to flash the stock firmware with latest version of Odin, but the device isn't showing up. I have windows 7 and I reinstalled several times the drivers. My computer is recognizing it just as an Unknown Device.
Please help me, this is my only phone and at the moment I can't efford another one.
s4ss0 said:
Hey there, I think my J3 2016 is bricked.
I accidently disabled the "OEM Unlock" in Developer Settings and now I am stuck at the samsung boot screen with a green text in left upper corner saying "Custom Binary blocked by FRP Lock".
I tried to flash the stock firmware with latest version of Odin, but the device isn't showing up. I have windows 7 and I reinstalled several times the drivers. My computer is recognizing it just as an Unknown Device.
Please help me, this is my only phone and at the moment I can't efford another one.
Click to expand...
Click to collapse
It can be recovered (I've done that myself). Install Kies and smart switch for the drivers, reboot PC, Open Odin, put the stock firmware (preferably from sammobile) in the AP section, in options turn off auto-reboot, start phone in download mode (volume down, home button and power button together) and connect it,flash the firmware. When it's done reboot using vol up, down, home and power together until it turns on then switch on normally.
That's what worked for me, step by step.
Wulfie217 said:
It can be recovered (I've done that myself). Install Kies and smart switch for the drivers, reboot PC, Open Odin, put the stock firmware (preferably from sammobile) in the AP section, in options turn off auto-reboot, start phone in download mode (volume down, home button and power button together) and connect it,flash the firmware. When it's done reboot using vol up, down, home and power together until it turns on then switch on normally.
That's what worked for me, step by step.
Click to expand...
Click to collapse
The problem is that the phone isn't even showing in Device Manager. Installing and reinstalling drivers isn't useful.
s4ss0 said:
The problem is that the phone isn't even showing in Device Manager. Installing and reinstalling drivers isn't useful.
Click to expand...
Click to collapse
Hmm, I occasionally have issues if I use the wrong cable, have you tried changing that over?
The drivers should have sorted it out and made the phone visible really. I seem to remember that mine doesn't pop up in device manager if its in download mode (though that may be me remembering it wrong).
Wulfie217 said:
Hmm, I occasionally have issues if I use the wrong cable, have you tried changing that over?
The drivers should have sorted it out and made the phone visible really. I seem to remember that mine doesn't pop up in device manager if its in download mode (though that may be me remembering it wrong).
Click to expand...
Click to collapse
I have 6 cables, I've tried them all, not a single one works.
s4ss0 said:
I have 6 cables, I've tried them all, not a single one works.
Click to expand...
Click to collapse
Update; sometimes, if i connect the cable, the phone gets phisically found, but it isn't found like a device, just like "Unknown device". Can I do something?
s4ss0 said:
Update; sometimes, if i connect the cable, the phone gets phisically found, but it isn't found like a device, just like "Unknown device". Can I do something?
Click to expand...
Click to collapse
If no cables are working at all then I'm out of ideas sorry.
Ignoring Windows is a good bet, in download mode it often doesn't show up, focus more on whether or not you can see it in Odin, trying different versions of Odin can't hurt either I suppose.
Wulfie217 said:
If no cables are working at all then I'm out of ideas sorry.
Ignoring Windows is a good bet, in download mode it often doesn't show up, focus more on whether or not you can see it in Odin, trying different versions of Odin can't hurt either I suppose.
Click to expand...
Click to collapse
hey there, i just used an older version of odin as you told me and now it works. thanks for the help!
s4ss0 said:
hey there, i just used an older version of odin as you told me and now it works. thanks for the help!
Click to expand...
Click to collapse
No problem s4ss0, I'm glad it ended up being something fairly simple so you could get your phone back.
Connection issues
It is possible to get round the connection issue: Turn off the phone. Turn on the phone in download mode (vol-down, home, power). Connect a Samsung USB cable. Launch ODIN on your PC. Wait a few moments and you should see green text on top left of phone 'ODIN MODE'. Your phone is ready to take downloads.

[Help] Galaxy Tab A SM-T580 displaying error

Hey guys! Greetings from Spain
I've a Tablet Samsung Galaxy Tab A SM-T580 and it displays the following error each time I power on: "An error has ocurred while updating the device software. Use the Emergency recovery function in the Smart Switch PC software.".
I can not go to any menu or somewhere else and I've seen it's a common troubleshoot when root or flash custom ROMs, but I've never done anything like that.
I've already tried the following things:
Connect it with Smart Switch, but the software says my model is not supported. As I've seen in some guides with this troubleshooting, I've tried to test with an older SmartSwitch release or try some options with "More" button, like reinstall device drivers or use Emergency recovery software tool, but device was not displayed on the list and any of these options have worked.
Connect it with Samsung Kies, but device is on "Connecting" status everytime and nothing else happens.
Try to reinstall an official ROM with Odin, however, is not possible to put it in Download Mode as when I press Home + Power + Vol Down it reboots displaying again the same error.
Contact with Samsung support, but they just asked me to follow stupid steps for newbies and conclude telling me I should go to an official technical service and pay as is not under warantee anymore.
Any suggestions?
Thanks in advance.
sergioas96 said:
Hey guys! Greetings from Spain
I've a Tablet Samsung Galaxy Tab A SM-T580 and it displays the following error each time I power on: "An error has ocurred while updating the device software. Use the Emergency recovery function in the Smart Switch PC software.".
I can not go to any menu or somewhere else and I've seen it's a common troubleshoot when root or flash custom ROMs, but I've never done anything like that.
I've already tried the following things:
Connect it with Smart Switch, but the software says my model is not supported. As I've seen in some guides with this troubleshooting, I've tried to test with an older SmartSwitch release or try some options with "More" button, like reinstall device drivers or use Emergency recovery software tool, but device was not displayed on the list and any of these options have worked.
Connect it with Samsung Kies, but device is on "Connecting" status everytime and nothing else happens.
Try to reinstall an official ROM with Odin, however, is not possible to put it in Download Mode as when I press Home + Power + Vol Down it reboots displaying again the same error.
Contact with Samsung support, but they just asked me to follow stupid steps for newbies and conclude telling me I should go to an official technical service and pay as is not under warantee anymore.
Any suggestions?
Thanks in advance.
Click to expand...
Click to collapse
The only thing I can suggest is to unplug it while showing the error screen, and let the battery run down completely. Then plug in a charger while holding the three buttons.
sergioas96 said:
Hey guys! Greetings from Spain
I've a Tablet Samsung Galaxy Tab A SM-T580 and it displays the following error each time I power on: "An error has ocurred while updating the device software. Use the Emergency recovery function in the Smart Switch PC software.".
I can not go to any menu or somewhere else and I've seen it's a common troubleshoot when root or flash custom ROMs, but I've never done anything like that.
I've already tried the following things:
Connect it with Smart Switch, but the software says my model is not supported. As I've seen in some guides with this troubleshooting, I've tried to test with an older SmartSwitch release or try some options with "More" button, like reinstall device drivers or use Emergency recovery software tool, but device was not displayed on the list and any of these options have worked.
Connect it with Samsung Kies, but device is on "Connecting" status everytime and nothing else happens.
Try to reinstall an official ROM with Odin, however, is not possible to put it in Download Mode as when I press Home + Power + Vol Down it reboots displaying again the same error.
Contact with Samsung support, but they just asked me to follow stupid steps for newbies and conclude telling me I should go to an official technical service and pay as is not under warantee anymore.
Any suggestions?
Thanks in advance
Click to expand...
Click to collapse
Pilot error.
You're not holding the 3 buttons for long enough. Keep held down until download mode appears.
Hi,
I have this problem with this same tablet. I've spent several days trying every option on xda.
The one solution that seem to work for some people is referenced in this post:
https://forum.xda-developers.com/showpost.php?p=79232815&postcount=40
I've tried to do this as well but odin fails while trying to flash system.img. Hopefully it works for you.
(somewhere in that same thread it said to get the "cellular south" firmware from sammobile and try to flash that as it is supposed to not have the FRP-lock feature which (among other things) blocks flashing from odin.)
After much grief with this tablet I think the best use case for it is to recycle it for parts, to use it as a paper weight or to throw it really hard into the head of the CEO of Samsung.

HELP; ONN Tablet ONA19TB, NOT LOADING AFTER SPTOOLS

Hi all. If anyone could help me out I"d greatly appreciate your time and any advice.
So I got this tablet from my brother, working and all, but Google FRP was on it and he couldn't remember the credentials from when he first set it up. "No worries," I proclaimed like some advanced Android tech, lol, "I'll get it running" First thing, I downloaded the "stock.img" firmware from the only other ONN tablet page. Then SPFLASH tools. Then I plugged in the tablet; holy crap theres instant connection (this is better than ODIN haha). I immediately click the Download tab, load the scatter file, the stock directory, etc and hit "Download" after only a couple of minutes, SUCCESS.
So it reboots.
Oh, wait wait, I did nothing to format the tablet and so I'm just back at FRP.
Back to fastboot.
Open SPFlash Tools and goto format, formal all except bootloader, Start. Now though, as I'm waiting, I look over and my niece is pressing buttons on it, nothing seemed to have happened tho on my PC except I noticed moments before, likely when my niece started pressing buttons out of my view, that the little red bar that normally shows progress turned completely red and filled from 0 to 100 in a split second. I left the device and PC alone, only to get a notification after just a couple of minutes reading:
"ERROR : S_FT_ENABLE_DRAM_FAIL (4032)
[EMI] ENABLE DRAM FAILED!
[HINT]:
Please check your load which matches to your target which is to be downloaded"
**I'm noticing that my PC, for whatever reason, is bouncing between seeing the device as USB Serial COM5 and "MK6***" So when the device bounces is when the connection seems to be losing. I'd be happy to share my output for format if this makes sense to anyone.
The only thing is, I cannot get any screen whatsoever to show up on this tablet. I've tried holding down power, power+vol down, power+vol up+vol down, for up to 30 seconds and yet nothing comes up. It's almost like I don't have a bootloader or anything anymore as the device just kind of seems stuck. Even if I try using the DOWNLOAD tab, I still get the message as above. If I try to do READBACK I get a slightly different message. The READBACK will start and the red bar doesn't fill up instantly but after a couple of minutes I get:
"ERROR : S_COM_PORT_OPEN_FAIL (1013)
[COM] FAILED TO OPEN COM PORT
[HINT]:
1.retry a new COM port (tried switching to another USB with no success);
2.retry a new cable;
3.retry a new device;
4.restart the computer and try again.
Am I missing drivers? I communicate with my MOTO on this laptop just fine because of the google usb_driver, but maybe I'm missing a driver? Or maybe the device is bricked in just a tiny instant of someone tapping a button?
Any help would be much appreciate. Thanks a lot!

"SECURE CHECK FAIL" on T295

Howdy,
I've used the Tab A for a couple of months now as literally a daily driver, since I modified it to fit into the multimedia slot in my car. It was rooted, had TWRP and even Viper4Android on it.
Long story short:
Since it's laggy I thought to test project Treble on it, since it's supported.
I wiped the tablet with TWRP and installed arm64 A/B (since it's Android 10) and it wouldn't boot anymore. It showed "Samsung Galaxy Tab A", shut off, vibrated and repeat. Also tried "Only A". Same result.
I thought to install it via fastboot. Since TWRP effectively replaced Fastbook afaik, I tried to flash the original "BL" downloaded form sammobile for this exact model. Flashed it, it succeeded and then...
It turns on with a blue screen that essentially says "This phone has been modified and is locked" with red letters on top stating "SECURE CHECK FAIL: recovery.img"
I can't get into download, it always jumps to this message. I tried all possible combinations, plugged the tablet into my pc while holding down buttons - nothing.
If I hold the pwr+down for circa 10-15 seconds while in this screen, it reboots and goes to a slightly different message stating: "SECURE CHECK FAIL: boot.img"
My PC doesn't recognize any USB devices, not even in the device manager.
What should I do? Any help would be greatly appreciated.
(I guess no music on the daily commute tomorrow lol)
Tried a Samsung JIG adapter. Still no success
Finally good news!
I tried it again with new combinations.
Turns out, if you hold all three buttons (pwr, down and up) eventually DOWNLOAD mode appears.
Worked here and am flashing stock now.
For rooting on latest bootloader (Rev:4, U4) which is the one you've installed already, you must purchase a subscription on this page and download that file for root:
https://support.halabtech.com/index.php?a=downloads&b=file&id=452768
As you described, it seem that you updated the bootloader and there's no way to get back at Rev:3 U3 bootloader, having the same trouble in rooting terms, I just hope a developer or an advance user that have a subscription in such page can help us and share the file that is on that page
Mafworld said:
For rooting on latest bootloader (Rev:4, U4) which is the one you've installed already, you must purchase a subscription on this page and download that file for root:
https://support.halabtech.com/index.php?a=downloads&b=file&id=452768
As you described, it seem that you updated the bootloader and there's no way to get back at Rev:3 U3 bootloader, having the same trouble in rooting terms, I just hope a developer or an advance user that have a subscription in such page can help us and share the file that is on that page
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No it wont work i have tried it. It gets secure check fail boot.img

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