Develop Bugs

[Q] Tab 3 8.0 not charging, no boot, no download mode. Any help?

Hello friends. I´m new in the forums, but I have now a huge problem in my hands.
I have a Samsung SM-T311 and it stopped working days ago. It wouldn't boot or charge. Recently, a message appeared in the screen, "Firmware upgrade encountered an issue. Please select recovery mode in Kies & try again".
I can start in Download Mode screen sometimes, with the USB cable in my PC. But as soon as I press "vol up" to enter the Download Mode, it restarts into the "Firmware upgrade encountered..." screen.
So, I have now an incredibly unstable tablet, that won´t boot or charge unless connected in my PC. And even connected, the only thing it shows is that message in the screen. Download Mode is not reachable, so I cant restore it in Kies or Odin, since it cannot be detected.
I know, it´s a mess. But before I send it to any repair services, there´s anything I can do to try and restore my device?
Thanks in advance.

ylfaer said:
Hello friends. I´m new in the forums, but I have now a huge problem in my hands.
I have a Samsung SM-T311 and it stopped working days ago. It wouldn't boot or charge. Recently, a message appeared in the screen, "Firmware upgrade encountered an issue. Please select recovery mode in Kies & try again".
I can start in Download Mode screen sometimes, with the USB cable in my PC. But as soon as I press "vol up" to enter the Download Mode, it restarts into the "Firmware upgrade encountered..." screen.
So, I have now an incredibly unstable tablet, that won´t boot or charge unless connected in my PC. And even connected, the only thing it shows is that message in the screen. Download Mode is not reachable, so I cant restore it in Kies or Odin, since it cannot be detected.
I know, it´s a mess. But before I send it to any repair services, there´s anything I can do to try and restore my device?
Thanks in advance.
Click to expand...
Click to collapse
Download your stock firmware from sammobile.com. Flash it using Odin.
The "firmware encountered an error" screen should work the same as the download mode screen. Just connect to pc when you get to that screen and make sure that it is detected in Odin.
Sent from my SCH-I605

gr8nole said:
Download your stock firmware from sammobile.com. Flash it using Odin.
The "firmware encountered an error" screen should work the same as the download mode screen. Just connect to pc when you get to that screen and make sure that it is detected in Odin.
Sent from my SCH-I605
Click to expand...
Click to collapse
It´s not detected by Odin. But thanks for the quick answer anyway.
EDIT: Well, after some effort, could start in download mode. But my computer can´t recognize the device anyway, either in Odin or Kies. It was working perfectly before, don´t think it´s hardware related.

Try reloading the Samsung drivers onto your PC. This may, or may not help. However, not reloading the drivers will keep you in the same state you are in now. Connecting the device and having Odin not recognize it is there tells me the drivers are invalid or corrupted or no longer there. It could also mean your device bootrom is badly damaged.
You may also want to try different USB ports on the PC. When you plug in the device to the computer, you can go to Computer Management / Device Manager and see which port the Samsung is trying to access.
Can you access recovery mode?

Also, try different USB cables.. They are NOT all created equal.
Some will charge.... but not connect to PC for file transfer..
It's real.. try different cables once you've reached D/L mode..
good luck
PS easy way to goto D/L mode is hold 'power' and 'Vol down' together, ONLY
Dont even mess with trying to hold the 'Home" button too..

[Q] (HELP) Cant Enter Download mode

I have a plan to re-flash my LGOGP E988 stock kitkat not rooted and i already downloaded the files i need but when i try to enter download mode based on what i read in all thread regarding to my unit (vol+ & vol - + usb plug into computer), thers no luck for me.. It always go to charging and not in download mode. I already installed required driversCan you help me?
Combination i tried that was no luck(usb plug in computer);
1. Off phone>remove battery>hold both volume>reinsert battery>plug micro usb
2. Off phone>hold both vol.>plug micro usb
3. Off phone>hold +vol >plug micro usb(vice versa, also use -vol)
4. Off phone> hold both vol. >Power button (go to hard reset)
5. Remove battery> hold both vol.>insert micro usb
Please help me i will update things that i already try.
Thanks in advance..
And i know thia will be benefit other members that getting hard times to enter download mode.

robtoman said:
I have a plan to re-flash my LGOGP E988 stock kitkat not rooted and i already downloaded the files i need but when i try to enter download mode based on what i read in all thread regarding to my unit (vol+ & vol - + usb plug into computer), thers no luck for me.. It always go to charging and not in download mode. Can you help me?
Combination i tried that was no luck;
1. Off phone-remove battery-hold both volume-reinsert battery-plug usb to computer
2. Off phone- hold both vol.-plug usb to computer
3. off phone- hold +vol -plug usb tomputer (vice versa alao use -vol)
4. Off phone- hold both vol. Power button (go to hard reset)
Please help me i will update things that i already try?thanks in advance..
Click to expand...
Click to collapse
Skip the reinsert battery part in your item #1:
1) Remove battery
2) Hold Volume plus and minus keys down
3) Insert USB cable while still continuing to hold down those two buttons.
WIthin 1-2 seconds you should have download mode. When download mode appears, then re-insert battery. For sure you're not going into charging mode with no battery to charge. This is the method I always use, and it always works (aside from hard-brick situations, but you can access battery charging mode/graphics, which surely means that ain't you).

not works.
culot said:
Skip the reinsert battery part in your item #1:
1) Remove battery
2) Hold Volume plus and minus keys down
3) Insert USB cable while still continuing to hold down those two buttons.
WIthin 1-2 seconds you should have download mode. When download mode appears, then re-insert battery. For sure you're not going into charging mode with no battery to charge. This is the method I always use, and it always works (aside from hard-brick situations, but you can access battery charging mode/graphics, which surely means that ain't you).
Click to expand...
Click to collapse
I realy appreciate your help but i try it several time but still not enter download mode. Just always show the boot logo of LG then off then show again the boot logo. Why am i getting this? Can anyone has their own solutions?

robtoman said:
I realy appreciate your help but i try it several time but still not enter download mode. Just always show the boot logo of LG then off then show again the boot logo. Why am i getting this? Can anyone has their own solutions?
Click to expand...
Click to collapse
What does your computer say when you plug it in? If in Windows check Device Manager and see what your phone is being recognized as. Can you access the phone's contents via USB cable from your computer? Does ADB recognize it at all? Or does it just loop like that, not starting?
Also, it sometimes takes several tries to get it into download mode, as if you're holding the buttons down and not timed just right, the phone ignore your attempt. Make sure you do not let go of both volume buttons even after you plug in the USB cable, you must continue to hold them down for a couple of seconds (until the DL mode appears). Don't even think about putting the battery back in until you see that download mode box. Try that a few times maybe? If it doesn';t work ,maybe you're boned.

robtoman said:
I realy appreciate your help but i try it several time but still not enter download mode. Just always show the boot logo of LG then off then show again the boot logo. Why am i getting this? Can anyone has their own solutions?
Click to expand...
Click to collapse
remove battery and place it again. then press both volume+ and Volume - . By keeping pressed both buttons insert your usb cable. don't release pressed buttons until its in download mood. by the way install unified adb driver for android by koush if your using windows 8.1 otherwise lg official driver is ok

Samsung Galaxy J6+ flashing crash - Boot loop endlessly

Hello,
I have a problem with my phone : Samsung J6+ (SM-J610FN/DS)
I have crached a flashing Rom with Odin and I'm sure it is because of that my phone can't start by pressing the power button.
Now my phone has the message : An error has occurred while updating the device software. Use the emergency recovery function in the smart switch PC software ...
The thing is that it is rebooting and looping without end every 2 seconds on that green screen with that message ...
Only thing I can do is, with the USB cable connected, when the green screen is up, I can push VOL down + VOL up and I can go in download mode.... Then I can push on VOL up but right after the phone reboot in loop again and again ...
Another thing is that without USB cable connected I can't start the phone.
What can I do ?
First thing, I can't start my phone if it's not connected with the USB cable.
Second thing, when I connect my phone with the USB cable, it starts automaticaly even if I didn't push the power button and it's looping and blinking and rebooting endlessly.
Also the phone don't seems to know how charging himself when USB cable connected.
Is it a Bricked samsung phone ?
If it is, how unbrick it ?

Bro, its just discharged when you flashed it

Help Please
User said:
Bro, its just discharged when you flashed it
Click to expand...
Click to collapse
I am getting same issue but each time its on charge it reboots and I can see the screen getting laggier ! And its 3 hour in charge and It still persisits. So should I charge it overnight while its still in boot loop?
---------- Post added at 06:40 PM ---------- Previous post was at 06:35 PM ----------
iddik said:
Hello,
I have a problem with my phone : Samsung J6+ (SM-J610FN/DS)
I have crached a flashing Rom with Odin and I'm sure it is because of that my phone can't start by pressing the power button.
Now my phone has the message : An error has occurred while updating the device software. Use the emergency recovery function in the smart switch PC software ...
The thing is that it is rebooting and looping without end every 2 seconds on that green screen with that message ...
Only thing I can do is, with the USB cable connected, when the green screen is up, I can push VOL down + VOL up and I can go in download mode.... Then I can push on VOL up but right after the phone reboot in loop again and again ...
Another thing is that without USB cable connected I can't start the phone.
What can I do ?
First thing, I can't start my phone if it's not connected with the USB cable.
Second thing, when I connect my phone with the USB cable, it starts automaticaly even if I didn't push the power button and it's looping and blinking and rebooting endlessly.
Also the phone don't seems to know how charging himself when USB cable connected.
Is it a Bricked samsung phone ?
If it is, how unbrick it ?
Click to expand...
Click to collapse
Did you fix the issue? please Help me if you did. I am getting same issue right now on my moms fone same brand j610f please do help.

Hello, I got the same problem. This happen because the battery is empty and the only way to charge again is open the phone and extract the battery to charged it with a external power supply

I recently tried to install a custom ROM in my samsung j6+ but halfway through it my PC turned off.
Then the problem starts i decided to reboot my phone but it shows this error "No command" " #Reboot recovery cause is [[check_bootmode]RebootRecoveryWithKey]#
Block-based OTA
Supported API: 3
# MANUAL MODE v1.0.0#
E:Failed to mount / cache: Invalid argument
The error message keeps appearing for just a fraction of a second then disappear and appear again
I tried to go to recovery mode but no luck i cant get to it
I drained the battery to turn off the device then go download mode but after get to it, it also keep restarting
help me please. thank you

iddik said:
Hello,
I have a problem with my phone : Samsung J6+ (SM-J610FN/DS)
I have crached a flashing Rom with Odin and I'm sure it is because of that my phone can't start by pressing the power button.
Now my phone has the message : An error has occurred while updating the device software. Use the emergency recovery function in the smart switch PC software ...
The thing is that it is rebooting and looping without end every 2 seconds on that green screen with that message ...
Only thing I can do is, with the USB cable connected, when the green screen is up, I can push VOL down + VOL up and I can go in download mode.... Then I can push on VOL up but right after the phone reboot in loop again and again ...
Another thing is that without USB cable connected I can't start the phone.
What can I do ?
First thing, I can't start my phone if it's not connected with the USB cable.
Second thing, when I connect my phone with the USB cable, it starts automaticaly even if I didn't push the power button and it's looping and blinking and rebooting endlessly.
Also the phone don't seems to know how charging himself when USB cable connected.
Is it a Bricked samsung phone ?
If it is, how unbrick it ?
Click to expand...
Click to collapse
Have you got the issue fixed on you phone?

Since you can reach download mode - why not doing a clean flash with the correct firmware?

S9 download mode straight into emergency recovery function (loop)

hi all,
appreciate any feedback/help on a weird issue i am facing with my old S9
i might have flashed with a corrupted S9 stock firmware - but here's the current situation post previous flash:
when i power up into pre download mode, before i can even press "volume up" to get into actual download mode, the screen jumps straight into emergency mode, where it says "an error has occurred while updating the device software. use the emergency recovery function in the smart switch PC software"
the phone currently boots directly into the emergency recovery function, tried connecting to PC via USB, PC does not detect the phone at all
tried to connect to ODIN during download mode, but the connection last about 2 seconds as the download mode jumps straight into emergency mode and connection to ODIN is disconnected hence not able to reflash

jbzai said:
hi all,
appreciate any feedback/help on a weird issue i am facing with my old S9
i might have flashed with a corrupted S9 stock firmware - but here's the current situation post previous flash:
when i power up into pre download mode, before i can even press "volume up" to get into actual download mode, the screen jumps straight into emergency mode, where it says "an error has occurred while updating the device software. use the emergency recovery function in the smart switch PC software"
the phone currently boots directly into the emergency recovery function, tried connecting to PC via USB, PC does not detect the phone at all
tried to connect to ODIN during download mode, but the connection last about 2 seconds as the download mode jumps straight into emergency mode and connection to ODIN is disconnected hence not able to reflash
Click to expand...
Click to collapse
Did you already solve this? I have the same problem, help please

A70 stuck in samsung logo and declines port.

I rooted my Galaxy a70 using vbmeta,Twrp and magisk. All was going well. Suddenly my phone turned off and when I press power button its shows download mode .so I tried odin to flash but every time it fails.After many tries I realise that its port are not connecting to pc ,its only charging and my pc also can't detect my phone ..now when I connect the phone to pc its shows samsung logo.its also not showing the battery percentage .
(My pc is ok it have all driver installed and odin works)
Is there anyway to solve.
Thanks.

reboot pc just to be sure.
connect phone and pc
on the phone in download mode screen, hold vol down and power till screen goes blank immediately let go and hold vol up and down to boot back into download mode. the letting go when screen goes blank to holding up and down needs to be fast.
now once back in download mode, is odin showing port number?
also make sure your using odin 3.13.3
if still no go, try uninstalling samsung usb drivers, reboot then reinstall and try the process again.

When I put cable in my phone it directly shows the logo....
Its not showing the battery

I tested my another Samsung phone to be sure that my softwares are working. And it's working but when I put my A70 in. Nothing happened