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My Galaxy Tab 7.0 plus (GT-6200) suddenly died, help please!

The unit has been used for about 2 months and remains quite new. It was quite stable before. Yesterday night, about half an hour after plugged in for charging and with WiFi Hotspot turned on for sharing 3G data to another netbook, the unit suddenly rebooted itself. It then stopped at the start-up screen and remained there for several minutes. I kept holding the power button for a few seconds to turn it off but it then automatically reboot itself afterwards, and stopped at the start-up screen again. It means that even complete turning off is not possible.
Trying to enter into recovery mode showed the following few lines:
# MANUAL MODE #
-- Updating application...
Copying Common Apks.
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Click to collapse
and then it automatically rebooted again. It means that it can't enter into recovery mode normally.
It was possible to enter into download mode. And it was the first time this machine went into download mode. I run Odin Downloader and flashed the official stock ROM. After showing "Pass", the device rebooted itself. Unfortunately, it still stopped at the start-up screen, just showing "Samsung Galaxy Tab 7.0 plus". It is really troubesome. I have experience playing several Android devices before and it is the first time I face such troublesome problem.
The device is an official product. The biggest problem is that the original purchase invoice was lost and most likely that I couldn't get official support, repair service or replacement.
May I ask if anyone would kindly provide me some help or advice. Thanks!

Instead of going into download mode go into recovery mode and see if there are any errors. Your scenario is sounding very similar to the one I had in the past.

I just ran into a nasty snag at boot logo as well. nandroid, stock kernel and factory reset were no help. Try Odin back to Stock, it still may not get past boot logo, hold vol up and power to get into recovery and factory reset. Hope it works for you.

Unfortunately I was unable to get into recovery mode even after odin flashing stock ROM.
It rebooted itself a few seconds after displaying some lines of text. I can't see the normal recovery menu.

help infuse sdmount error, phone wont boot

ok people...in need of help.
back story, my phone has been force closing and freezing frequently, but this is not unusual with this model phone....infuse 4g AT&T....i would have to restart my phone at least 4 or 5 times a day. that's not why i'm posting though... last night around 4am i used my phone for the last time before i went to sleep. it had 100% charge. today when i woke up it was on the samsung logo. i tried to restart for like half an hour trying various methods, hard boot, taking out battery, etc. nothing. still on samsung logo. then i tried to enter recovery and wipe/format.... kept getting an error...all options chosen kept giving me a fail to execute message. last resort, i tried to restore to stock using odin. i did this twice, first time with the re-partition checked (it got stuck), second time without it checked (worked, installed stock rom but still stuck on samsung logo) third time with re-partition checked and it got through the installation just fine, all passes all green lights. phone still boot loops but now not at samsung logo, at "rethink possible" screen. i try to go to ui menu before booting and i cant, it just takes me to recovery where none of the options work. i'll upload the screen that i get when i try to install or select any option. any help appreciated!
M

[Completed] I think I have bricked my SM-T320, help

model: sm-t320 wifi only, just flashed cm13 nightly, i believe it was the one released on the first of February 2016, the tablet was working okay sometimes a bit laggy but that is expected with the nightly not fully developed or whatever. i installed and am still using cm13 on my tablet but i installed it on my friends tablet which is the exact same tablet, color and all, and this happened: it shut of by itself and when i tried to turn it back on it wouldnt. i plugged it in and the battery charging icon turned on but it was only the icon with the loading circle image in the middle. so i let it charge for a good six hours and during that the screen stayed on with the same image. when i unplugged it, after about two seconds the screen dimmed and started flashing on and of as if there was a loose connection. then it just shuts off. when it is unplugged i cant do anything, (turn on, download mode, recovery) the screen just stays blank. when i have it plugged in i can access the first boot screen displaying "samsung galaxy tab pro" and it will not go any further. i can also access download mode perfectly. i cannot access recovery mode, it just goes straight to the first boot screen. i tried flashing the stock rom and was unsuccessful. either because the computer was not supplying enough voltage/amps to keep the tablet running or it just simply would not boot. the flash was successful each time i tried on odin but the same issues happened on the tablet each time. i did not install Gapps because he just wanted to try it out quickly and maybe keep it or go back to stock if (that helps). i believe that is all i know. please help me!

XDA Visitor said:
model: sm-t320 wifi only, just flashed cm13 nightly, i believe it was the one released on the first of February 2016, the tablet was working okay sometimes a bit laggy but that is expected with the nightly not fully developed or whatever. i installed and am still using cm13 on my tablet but i installed it on my friends tablet which is the exact same tablet, color and all, and this happened: it shut of by itself and when i tried to turn it back on it wouldnt. i plugged it in and the battery charging icon turned on but it was only the icon with the loading circle image in the middle. so i let it charge for a good six hours and during that the screen stayed on with the same image. when i unplugged it, after about two seconds the screen dimmed and started flashing on and of as if there was a loose connection. then it just shuts off. when it is unplugged i cant do anything, (turn on, download mode, recovery) the screen just stays blank. when i have it plugged in i can access the first boot screen displaying "samsung galaxy tab pro" and it will not go any further. i can also access download mode perfectly. i cannot access recovery mode, it just goes straight to the first boot screen. i tried flashing the stock rom and was unsuccessful. either because the computer was not supplying enough voltage/amps to keep the tablet running or it just simply would not boot. the flash was successful each time i tried on odin but the same issues happened on the tablet each time. i did not install Gapps because he just wanted to try it out quickly and maybe keep it or go back to stock if (that helps). i believe that is all i know. please help me!
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Click to collapse
Greetings,
Thank you for using XDA Assist.
Based on the model number you've provided, this is the homepage for your device:
Samsung Galaxy Tab Pro 12.2, 10.1, 8.4
Guides and other helpful information can be found in the General Section.
If you create an XDA account, you can ask your questions in the Q&A Section.
Good luck and welcome to XDA!

Help required S7 DUOS [SM-G930FD] hanging during update after flashing stock ROM.

I have been given an S7 SM-930FD [Dual Sim] that was supposed to be bricked. It wouldn't boot into anything but I have successfully got it into download mode and been able to successfully flash a stock ROM downloaded from Sammobile [several times] with no errors. Each time I have used the full set of AP,CP,CSC files and the previous owner is not sure what ROM it was on or what he tried to install. I have tried different versions of the firmware for this model for various android versions and regions simply to try and get it to boot, but without success. I have tried HOME CSC and CSC files too.
But each time it starts to install the update / reboot it hangs. Either when it installing the update on the blue screen with the robot and its "erasing" - small rotating symbol just stops and nothing happens OR it loads to the GALAXY S7 normal boot screen then hangs.
When it hangs it will only respond to one key combination Power + Vol Down. It then "switched off" and will not reboot in any mode. When I say "switched off" I mean the screen goes black. However if I then connect the charger, it won't show the charging symbol UNLESS I leave it for a few hours and the battery goes flat. It will then charge and I can boot into download / recovery mode but normal boot starts installing the update and it will hang all over again. On one occasion it hung with and black screen and blue flashing light but again no key combinations worked and I had to wait for the battery to drain.
Also tried Smart Switch Emergency Recovery. Even with the drivers freshly installed it does not recognise the phone, it does accept the model number during initialisation, but once the S/N is entered it comes back and says it can't find the model, S/N or IMEI in the database!
I have researched the web for hours and watched every relevant youtube video and tried their suggested key combinations etc and they just don't work.
So I'm hoping someone can help me resolve this frustrating situation, not least because of the delays between attempts!
Presumably as I can consistently get it into download mode there is a solution out there somewhere???????
What am I doing wrong? Should I be looking at a custom ROM or trying something else?
All help appreciated.

Having various problems trying to flash my S7 out of a boot loop

Had it for 3 years now, it first looped in October 2017, broke all the sensors but has otherwise been working fine since. I also rooted it about 7 months ago in case that makes any difference with recovery. During both of these loops I have been unable to reliably get into recovery/download mode. I left it alone for an hour earlier today and came back to find that it was somehow in Odin/download mode with the text in the top left but still on the boot screen. So I plugged it into my computer, it was detected and then I flashed it with the correct G930T firmware and home csc. Got the success message in Odin and it seemed to be working but it was just stuck on the boot screen now. So now I've just been trying to flash it again with the other csc but it has been failing for a lot of different reasons and I don't know what any of them mean. I did manage to get it to power on a lot more reliably and into download mode, but still having problems. The biggest problem is when I get to either the download screen or warning screen, the screen suddenly gets all glitchy and I can't do anything. Whenever that happens it also shuts off after 10 seconds. This also happened on the Smart Switch emergency recovery screen when I cancelled a stalled flash and then tried to flash it again from that screen. I've also gotten errors when trying to flash from the download/boot screen. The ones I can remember are "unsupport dev_type", "secure check fail : tz eMMC write fail : tz" and "secure check fail : hyp eMMC write fail : hyp". I can't even find anything else on these errors and have no idea what they mean. I also have no idea how it is getting into Odin mode on the boot screen but so far that is the only way I have been able to do anything since I can't get into download mode the proper way. Lastly I tried to check in Smart Switch to recover it but it says the device is unsupported and there is nothing in emergency recovery.

Operation Ivy said:
Had it for 3 years now, it first looped in October 2017, broke all the sensors but has otherwise been working fine since. I also rooted it about 7 months ago in case that makes any difference with recovery. During both of these loops I have been unable to reliably get into recovery/download mode. I left it alone for an hour earlier today and came back to find that it was somehow in Odin/download mode with the text in the top left but still on the boot screen. So I plugged it into my computer, it was detected and then I flashed it with the correct G930T firmware and home csc. Got the success message in Odin and it seemed to be working but it was just stuck on the boot screen now. So now I've just been trying to flash it again with the other csc but it has been failing for a lot of different reasons and I don't know what any of them mean. I did manage to get it to power on a lot more reliably and into download mode, but still having problems. The biggest problem is when I get to either the download screen or warning screen, the screen suddenly gets all glitchy and I can't do anything. Whenever that happens it also shuts off after 10 seconds. This also happened on the Smart Switch emergency recovery screen when I cancelled a stalled flash and then tried to flash it again from that screen. I've also gotten errors when trying to flash from the download/boot screen. The ones I can remember are "unsupport dev_type", "secure check fail : tz eMMC write fail : tz" and "secure check fail : hyp eMMC write fail : hyp". I can't even find anything else on these errors and have no idea what they mean. I also have no idea how it is getting into Odin mode on the boot screen but so far that is the only way I have been able to do anything since I can't get into download mode the proper way. Lastly I tried to check in Smart Switch to recover it but it says the device is unsupported and there is nothing in emergency recovery.
Click to expand...
Click to collapse
When you flash with Odin tick "'re partition" in Odin options.
When "pass" appears disconnect phone from pc. Force reboot by holding home+volume down+power.
As soon as screen goes black press volume up while keeping home and power pressed. When recovery menu appears choose wipe / factory reset. Then reboot.
What is obviously very important is you are flashing the correct firmware for the device in the first place.