Develop Bugs

Failed to mount EFS, Bootlogo loop N7100

Hello!
My Note 2 died a few days ago and nothing seem to help it live again.
It stays stuck on the Samsung logo when I try to boot it up and accessing the recovery gives me the errors in the picture (can't mount EFS etc...).
It was working fine and it suddendly stopped working.
I can enter download mode fine and everything seems to be ok there, the product name is there, System Status: Official, Current Binary: Samsung Official.
I tried flashing a 4.4 Rom via Odin but it fails giving me a NAND write error, I also tried to use Kies firmware initialization but Kies doesn't detect my phone, it gets stuck on "establishing connection". I'm sure my cable is working fine because I tried connecting another Samsung phone, I also tried all the USB ports and a different PC too.
I read that it could be due to EMMC memory fail and that it can be fixed by replacing the motherboard only, but I also read that people with that problem also get a blank Product Name in download mode, which isn't my case.
Is it really an hardware problem? Can I try some other routes?
It won't let me posts images so here's a link to the problem I encounter in recovery mode
tapatalk.imageshack. com/v2/14/11/06/23af67e9840ce07e390c27f208a523c4.jpg
delete the blank spaces and add http:slashslash

Help request: SM-T111 (no Recovery or Download mode; no Kies Recovery possible)

Hello,
I would like to kindly ask you for help.
Current status of my device SM-T111 (Samsung Galaxy Tab 3 7.0 Lite 3G) is:
- can’t boot normally
- can’t enter Download mode (Pwr+Home+VolDown)
- can’t enter Recovery mode (Pwr+Home+VolUp)
- when charger is connected, device is starts powering on and off in 1 sec. interval and screen flashing, and showing error screen “Firmware upgrade encountered an issue. Please select recovery mode in Kies & try again.”
- when connected to computer via original microUSB cable, there is same issue. Windows 7 Pro x64 indicates USB connecting/disconnecting by typical sound.
-- Kies (which I’ve used in past for backup) is not able to connect device. So I can’t run recovery mode.
-- Odin 3.09 (even I if “kill” all Kies processes before) give is no able to connect device as well. So I can’t flash any AP
- example screen #1 (not from my device) bellow (but flashing on/off in 1 sec. interval)
Step before:
- I’ve rooted my device as written here: http://forum.xda-developers.com/showthread.php?t=2712379 [all worked fine]
- I’ve unrooted device (as I’ve need it) via uploading original ROM via Kies [all has been fine]
- After few months I’ve tried to root device again via same process. But when I uploaded TWRP (same like first time) Screen stuck on TeamWin screen. Example screen #2 (not from my device) bellow.
- I’ve search how to solve this and based on other threads, I’ve tried to flash original ROM via Kies again.
- Unfortunately… it stopped during the process and my device is death
Additional screen info (from my flashing screen):
Odin mode
Product name: SM-T111
Current binary: Samsung Official
System Status: Custom
H/W Version: 0.2
Can you advice what to try to get my device alive again, please?
Any sense making help appreciated.
Quido
Example screen #1:
https://www.google.cz/imgres?imgurl=http://cdn.droidviews.com/wp-content/uploads/2013/09/Firmware-upgrade-encountered-an-issue.jpg&imgrefurl=http://www.droidviews.com/firmware-upgrade-encountered-an-issue-solution/&h=446&w=520&tbnid=37-3W875vfYa6M:&docid=YGevRYPr4h-v1M&ei=n-l2VqGgLsLcO5fuifgM&tbm=isch&ved=0ahUKEwjh68ey_-rJAhVC7g4KHRd3As8QMwgfKAAwAA
Example screen #2:
https://www.google.cz/imgres?imgurl=http://i.imgur.com/InBm0oT.jpg&imgrefurl=http://forum.xda-developers.com/galaxy-s3-mini/help/help-phone-stuck-teamwin-bootloop-t3122781&h=480&w=640&tbnid=0qYE0GQ03oRtxM:&docid=JdrQ8o7jaxsR0M&ei=yel2VsyGK4XJOsrHubAC&tbm=isch&ved=0ahUKEwiMj8jG_-rJAhWFpA4KHcpjDiYQMwgfKAAwAA
Edit 07.01.2016: Any help, please?

Even Im Facing the same issue
Even im facing the same issue. But not by trying to flash recovery or rooting my tab t111 , i flash some wrong rom on my device struck on firmware upgrade failed

Sounds like you need a USB jig it forces it into download mode

HELP sgh-t989d is stuck in odin update failed mode

ok so i had the latest cm13 rom on my phone partition is in ext4 had many issues with the rom so i went to flash the stock rom with odin
while the firmware was loading my usb cable failed and an error popped up saying odin process was aborted then the com port went empty (the phone disappeared) no the phone will not go into download mode while trying to get into download mode every thing looks good till you press the up button an you go to odin mode but with a message: firmware upgrade encountered an issue. please select recovery mode in kies and try again.
however my pc will not recognize my phone any more and i can not get into recovery either
in fact if i just plug the phone in it boots up to this message screen without even touching any buttons
I have tried just about everything i can think of even a unified toolkit but nothing will work as i cant access recovery or odin or kies???
I have also gone threw the forums and was not able to find anything pertaining to this directly
please help

Sort of bricked G4, rebooting download mode, no fastboot recognition nor TWRP

Hi all,
I have tried my luck in two different threads already and did hours of research but thus far, no success. I hope somebody can help me.
I installed the official Nougat (V29A) update and after that the Oreo AOSCP ROM. Everything went (seemingly) fine, Oreo was working. I wanted to reflash Oreo to get rid of some Google Apps, but the problem then was, that I could not reboot into TWRP. The only recovery mode is the Android recovery and I cannot reset the phone, neither use ADB sideload, nor do anything else (unknown fs_filetype error). Only thing that is working, is to enter the fastboot mode, but my laptop does not recognize the phone while in fastboot mode.
I also tried resetting the phone to factory defaults from within Android (back when it was still booting up) and now my phone is stuck in a bootloop which ends in the (useless) Android recovery mode.
At first I thought reflashing the stock kdz would not be a problem. I am able to enter download mode, but it only stays in download mode for about 15 seconds and then reboots itself. LGUP or LG flash tool, don't recognize my phone in that short amount of time.
I tried the above mentioned solutions on OS X, Windows 7, Windows 10 as well as FWUL. No system recognizes my phone.
I really am at my wit's end. Any help would be appreciated.
If any further information are needed, I am happy to provide these.

I changed following in hidden menu NT Code, changed as below NT Codes with respect to firmware region... Rebooted after confirmation "NT Code Write OK" message.
V29a Firmware NT Code:
"1","FFF,FFF,FFFFFFFF,FFFFFFFF,11"
V20h Firmware NT Code:
"1","FFF,FFF,FFFFFFFF,FFFFFFFF,51"
Checked in both above firmwares..Worked flawlessly on my h818p...No more annoying message on every boot.
Software Version in about/ settings also changed to region exp. 20h-DS2-XX to 20h-ESA-XX upon reboot.
Is DS2 appears when cust mismatch..?

Firmware Upgrade encountered an issue screen

*****FIXED*****
I attempted to revive a bricked device on boot loop using download mode and ODIN.
Later an error occurred and my table was brought to ''firmware upgrade encountered an issue" screen.
I am unable to use Kies because it cannot detect my device as I cant boot into download mode , as soon as I power on, I am taken to the same screen.
*short: I can't get PC to recognise device and cannot enter download mode.(I have installed drives)
Is there any solution to this?
Thank you!
EDIT: I just found out about USB jigs, will any jig work with my device or do I need a certain compatible one (Can't seem to find anything)