Develop Bugs

[help] cannot boot into TWRP or ROM after flashing autorec TWRP

I have two G3 D855 phones and what i did was exactly the same as my primary one, and it's not working
For the secondary phone
1) everything was perfect after I changed 32GB chips (ROM, my friend flashed something wrong and hard bricked the device) from repair shop, but I just lost the IMEI, so it's showing 0 currently (i know i can repair but don't bother yet)
2) phone is normal in 6.0MM nor I use LGUP to downgrade to 5.0 LP
3) used "newest root method v03" from there to root the phone
http://forum.xda-developers.com/lg-g3/general/guide-root-method-lg-devices-t3129197
4) go to playstore, download AutoRec D855 to install TWRP
5) problem starts here
once i reboot to TWRP using reboot widget, or adb command, i can go into TWRP, but phone stuck in LG logo after another reboot
To boot up the OS again, I have to take out the battery for 10+ min, then insert it again and it will boot up, and i can also go into TWRP from the OS
or if i turn off device, I cannot boot up, not until i take out the battery for 10+ min
I have flashed the phone using KDZ twice and same problem, after install TWRP from AutoRec, I have this bootup problem.
Any help please?

missing download mode
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when i try to put it into download mode (holding vol up and plug in USB) or using "ADB reboot download" command
that's what i see, i think i messed up my download mode?
when I follow this guide, it said "failed to erase" in first step
http://mybaseisrace.blogspot.hk/2016/02/how-to-fix-lg-g3-download-mode-not.html

Tab 3 GT-P5210 Failed Root

Hi, I tried to use Odin to root my Galaxy Tab 3 GT-P5210 (Build KOT49H.P5210UEU0CNK1), and it said "Passed" on Odin, but my tablet is now stuck on the "Samsung Galaxy Tab 3" startup screen (it won't boot). Is there a way to remedy this? Also, I can't seem to download any TWRP files, it gets blocked by the antivirus saying that a virus has been detected in the file. The only other option I can access is when I press Volume Down and Power at the same time, it goes into ODIN Mode on my tablet.
Thanks

Try to flash bootloader (BL) with Odin, CSC is not needed but it doesn't hurt to flash it with BL.
In this file, CSC (Country/Carrier Specific Code) is for US region
http://www.mediafire.com/file/c224oin6adfqisg/GT-P5210(2).rar
If it doesn't work, try to flask BL, and AP with Odin.
The stock ROM ( AP ) is here, and Cellular South is for US region
https://www.sammobile.com/firmwares/database/GT-P5210/
I rarely fail when flash Stock Rom with its bootloader ( BL )
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Hi
Is it still possible to root my Tab 3 P5210? And then flash a custom rom of android 6 upwards?
It currently runs on android 4.4.2 but im not sure if that was the version it was purchased with originally. I tried recently when i followed instructions from another thread on here but i soft bricked my device (same as OP - passed on odin, tab stuck on loading screen), although i did recover it back to its previous state eventually. I was using the latest Odin V13, but im not sure if the version of android or odin version needed to be specified for using the right apk files?

Samsung Galagy Tab S4 stuck after rooting ? what i did wrong ?

Hello !
i think i messed up a little with my T830 and now it's kinda stuck on the bootscreen.
i wanted to root it so , i followed an online tutorial but it looks like i did something wrong.
here is the steps i followed :
i installed The Samsung USB drivers
i installed Odin
i sat my tablet in the " OEM Unlock " and forced the download mode in order to install the patched boot.tar in the AP mode in odin 3. the Flash was sucessfull.
once it was done, i installed the " twrp-3.6.2_9-0-gts4lwifi.img.tar " via Odin in AP mode for my tablet, in order to have access to the twrp menu but it don't work.
( the flash was sucessfull )
Now my tablett is stuck on this screen and the only thing i can do is to reboot it.
i can't boot it in download mode anymore.
i guess the last file i flashed was corupted or innapropriate ? but i don't really understand what i did wrong. my tablett is the SM-T830, so it should work fine ?
i'm kind of worry because Odin and adb don't see my tablett anymore and i don't have access to the Download mode anymore.
[Update: sometimes i manage to have Access to the Download mode ( but it's really tricky ) and i can see my tablett on Odin 3, my tablett still can't boot on Android. I don't know what file i need to flash in order to fix my problem ! Help :I ]
[ Update2: i managed to download the stock rom via Frija, and installed it, but my tablet is not rooted anymore, it's still better than nothing i guess ]
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Stuck On Fastboot and SECURE BOOT -yes

Hi everyone,
I need help to fix this problem: Stuck On Fastboot and SECURE BOOT -yes
I use LG G8 with firmware G820N20v Korean Open, the details how it ended up like this was:
1. I did unlock bootloader + magisk root after doin crossflash, it ended up well.
2. then i try to write my IMEI using this methods: https://www.hovatek.com/forum/thread-38608.html but didn't succes,the imei didnt change and my magisk been lost.
3. someone on my local group told me to try disable dm-verity first before write my IMEI. So i search for methods and found this one: https://www.hovatek.com/forum/thread-32719.html yes i flashed that empty vbmeta, and when i restart my phone it ended with white screen sayin that i need to insert pasword with 30x attemps (now still had about 10-15 attempts because it decrease everytime phone restart) because my phone is encrypted but i cannot touch any of my screen.
4. i can u enter EDL mode though, so i tried to restore everything that i backuped before like FTM, BOOT_A, BOOT_B, ABL_A, ABL_B and it ended Stuck On Fastboot with SECURE BOOT -yes. Heres the pic:
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Its even cannot to power off, always goin back to fastboot automatically.
I appreciated any helps or methods here.
Anyone?
Thanks and regards.

my phone's working now following this step https://forum.xda-developers.com/t/tutorial-rescue-from-hard-brick.4351389/ thanks @netmsm

Galaxy Tab S4 stuck at boot after trying to root

Hello together
I tried to root my Samsung Galaxy Tab S4 according to https://appuals.com/how-to-root-the-samsung-galaxy-tab-s4/
There I came up to step 10 (so I flashed the two files). Now the Tablet is kind of stuck in the boot screen showing this (the same for step 8 and 10 but at step 10 i lost the ability to get to the download mode):
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"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
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The only thing possible is to gamble a bit with the keys power, volume up and down to get the yellow sign in the top left showing "kernel" instead of "recovery". Otherwise if I press all three buttons together the following screen comes:
I am a complete noob in that kind of things and got no idea what to do now. There is no possibility to open the download mode to revert something, neither TWRP is shown as it should according to the Description in Link above. If possible I dont want to get anything deleted. What can I do?
EDIT: If possible I still want to root the tablet because I only see advantages in it, even I never found a good (explanatory) tutorial on it.
kind regards
alhuwile

Ok as I was very impatient and tried a bit, the blue screen is actually the "ODIN Download Mode". I reinstalled the stock firmware (loosing all data) (and rooted the device with Magisk later on) so the sm-t830 works perfectly again.

alhuwile said:
Ok as I was very impatient and tried a bit, the blue screen is actually the "ODIN Download Mode". I reinstalled the stock firmware (loosing all data) (and rooted the device with Magisk later on) so the sm-t830 works perfectly again.
Click to expand...
Click to collapse
Which guide did you follow and what firmware are you using?