HELP ! A8+ not detected by computer - Samsung Galaxy A8+ (2018) Questions & Answers

Hello, so for quite some time my A8+ (2018) wasn't detected by my computer, it wasn't bothering me as i didn't really care about it, but now that i need to flash a stock rom into it again, i need USB access so that ODIN can detect it in download mode, so to sum things up:
- My phone is rooted.
- No it doesn't get detected in other computers.
- The cable isn't the cause as i tested the same cable in my S10+ and it works, tested the S10+ cable and it doesn't work on my A8+.
- The phone is being charged by the USB to PC connection, yet it's not detected by neither device manager(Samsung's android drivers are installed) or any android software (kies, adb...).
- In Dev Tools i can only change it to MTP or PTP, neither gets detected, *#0808# is already set to MTP + ADB, rebooted many times to no avail.
I could really use any suggestion, i have TWRP installed if that can help me with anything, a full phone Wipe using TWRP has been done, nothing changed.
Thank you so much in advance.

Related

[Q] Zero connectivity in download mode. £10 for solution. :)

Okay a little backstory:
I was on an early version of CM9 but as i am selling the phone i decided to put a more stable version of it on there and downloaded CM7 -stable.
I flashed this in CWM and it worked fine.
I gave it a quick test and noticed all the google apps were missing, most importantly the market. So i booted into recovery and realised i had forgotten to put the zip on the SD card.
I then went into mounts and mounted USB, nothing happened...
From that point onwards the phone would not talk to the PC. even if i booted up into the phone, it would just show it as charging. I could not find any options in the menus for USB options.
After some extensive reading, i tried a few things, none of them had worked. I found a post mentioning some kernels have issues with USB, so i downloaded the recommended one and flashed it in CWM.
After rebooting, CWM was now orange and not blue and the option to flash from external card has gone.
I have also done some digging and there is a good posibility that the kernal that i flashed was for the GT I9000 (which is the american one, right?)
So as it is at the moment:-
I can get into CWM.
I can get into download mode through the 3 button combo.
I can get into download mode using home made jig.
I can boot the phone, but it boot loops.
I can not get the phone to be detected on the pc.
Things i have checked:
Cable will connect other phones.
Tried different cable to be sure.
Phone used to be detected, but downloaded drivers through kies again to be sure.
Closed Kies using task manager.
Nothing is coming up in network connections in device manager when phone is connected.
I'm out of ideas now, so £10 PayPal donation for anyone that comes up with the solution to fix it
If i can get it detected, i can use Odin to flash what i want.
Sounds like a drivers problem. You may need the 'Google driver' developer.android.com/sdk/win-usb.html
When I had bootloops when I first installed CM9 I used heimdall to flash a the stock CM9 kernel. This gave me back CWM.
heimdall flash --kernel 'kernel.zip'
In the commandline.
Thanks for that,
I already had the Google USB drivers from when i installed the SDK to make some apps.
So i then gave Heimdall a try (Graphical Version), it seemed to suffer the same problem.
Reporting "Failed to detect compatible download-mode device."
I seem to remember the GUI saying I didn't have the correct drivers and it downloaded them for me.
The other thing worth a try is changing the USB port and reinstalling the correct drivers on that port.
I've not seen anything like that, it has not asked me for any drivers.
It's like the phone is not connected at all. nothing will detect it, i have even tried it on another PC.
Sorry, I'm not sure what you mean by installing on a port.
Well sometimes changing USB port will allow you to install new drivers. Although if you've tried it in another computer and it doesn't work then changing port may not help.
Does the phone appear in device manager when it's connected and in download mode?
Nope. Not coming up at all in the device manager. It didn't when it was booting fine. And it still doesn't in download mode. :-( I'm thinking the usb connector on the phone might be faulty.
But it was working up until trying to mount the USB in CWM
Sent from my GT-N7000 using XDA App
I don't suppose you have access to a Linux PC do you? Windows USB drivers are notoriously sucky. If you could plug it into a Linux PC and type 'lsusb' at a command line, that would at least show you that the device is really there.
I think I have a spare pc kicking around that I could use. I'll give it a go when I get home tonight.
Sent from my GT-N7000 using XDA App
Remove all the drivers completely from device manager for Samsung, then install fresh drivers and connect the cable when in download mode, hopefully it will recognize it
Are you sure the connector is clean? e.g. maybe there's dust in it.
I had that problem once, the connector was full of fabric fibers from some coat's pocket I had the phone in.
Suggestion 1 (Linux): I installed ubuntu, did not detected anything to even install any drivers. Detected my new phone fine.
Suggestion 2 (Uninstall drivers from device manager): I could not find any drivers named with the name Samsung in there.
Suggestion 3 (Clean port): I have some compressed air that i sprayed inside, it does look pretty clean and will continue to charge but still not connection on the pc.
To install the drivers for heimdall you have to run zdiag from inside the driver folder. Had to do this earlier on, the phone the other appeared as something other than Samsung composite usb or whatever it normally says
I tried this, and it displayed 9 devices after selecting show all. I seemed to recognise all of the items in the menu.
To be sure, I then disconnected the phone and re ran it to see if one of the items were missing, but it was the same number.
I too had problem with the usb connection on my i9000, and I was pretty sure my usb connector on the phone is somewhat damaged since it sometimes can only go to charging mode without being detected by my pc as a usb device. CWM instal is fine but ODIN can only detect the phone without able to flash the rom to the phone. The flashing will always stuck at the message "Setting Up Connection", I waited for 15 minutes and the flashing will eventually died. I retry the odin flash for 40 to 50 times and eventually the flashing will go through one time. Tried heidmall command line and the result is the same.
I have problem with Odin in the past. I bought a new laptop, running Win7 64 bit. Installed Samsung Kies to install the correct USB drivers for the phone. Then made sure that Kies wasn't running in the background. So tried using Odin. Odin was detecting the phone, but it was hanging at initialising connection. Odin was working fine on my old laptop running Win7 32bit. Long story short, I was having a few issues with my new laptop, reinstalled Win7 64bit, now Odin is working fine, have flashed the phone a few times using the new computer.
After flashing which kernel you started facing this problem?
Wipe ur phone,re-flash CM7(flash the nightly 181,it's completely stable),uninstall KIES,uninstall old usb drivers,install these usb drivers http://forum.xda-developers.com/showthread.php?t=961956 ,check that USB storage mode is set as Mass Storage and then connect your phone. Also try enabling/disabling USB debugging
lovedonator said:
After flashing which kernel you started facing this problem?
Wipe ur phone,re-flash CM7(flash the nightly 181,it's completely stable),uninstall KIES,uninstall old usb drivers,install these usb drivers http://forum.xda-developers.com/showthread.php?t=961956 ,check that USB storage mode is set as Mass Storage and then connect your phone. Also try enabling/disabling USB debugging
Click to expand...
Click to collapse
The point at which i could no longer mount the USB was when i selected "mount usb" from CWM. I later installed a new kernal which downgraded my CWM, removing the install from external SD option.
So I cant flash a re-flash a rom unless i can it onto the phone which without the USB working is near impossible.
Xyis said:
The point at which i could no longer mount the USB was when i selected "mount usb" from CWM. I later installed a new kernal which downgraded my CWM, removing the install from external SD option.
So I cant flash a re-flash a rom unless i can it onto the phone which without the USB working is near impossible.
Click to expand...
Click to collapse
You can directly download the ROM on your internal sd using dolphin browser or opera mobile
I can't do that either as the phone is currently boot looping.
Sent from my GT-N7000 using XDA App

Installed XDDual recovery now no recognize

So installed the dual boot recovery. I have it on my phone along with superuser and now my computer wont recognize the phone. Sorry to post so many threads but i need to get post amount up to 10. This locked bootlaoder stuff is weird going from clockwork mod on my g1, g2x. Thanks for all help.
bump
tristan582 said:
bump
Click to expand...
Click to collapse
installing a recovery shouldn't stop the computer from recognising the device, where to is it being failed to recognise? flashtool? usb storage? have you tried removing the drivers from device manager and reinstalling them? have you tried a different usb cable? different usb port?
So the phone is never recognized if I just plug the phone into the computer. No charging light, doesn't show up on computer. Tried 3 different cables and many usb ports that i know work. I have windows 8 so It almost always auto detects hardware and auto installs drivers. I deleted it from hardware and printers and downloaded the sony zperia z driver for windows 8 and it s a zip file. I tried extracting it and it only opens up as a bunch of random files. NO application. I have only installed the XZ dual boot recovery and root with restore v33. It only charges sometimes if I plug it in and reboot it. But it still doesn't show up as a device on my computer.
So when i plug in the phone and reboot it charges the phone and says usb debugging but my computer doesn't show the phone.
I also have ubuntu imstalled on my computer (dual boot) and it doesn't reconize the device in ubunutu either. And when trying to use any of the flash tools it says device not found or connect device.

Hard brick help 911

I'm in a big predicament. A few weeks ago I installed the MOAR ROM on my Note 5. After installing this ROM I was no longer able to connect my phone to PC. I tried a Windows 8 PC which says I have an unrecognized USB device plugged in. I tried going into Developer settings to set USB mode to MTP but the option didn't exist. I had all USB drivers installed as well. My wife's phone is recognized no problem. When plugging the phone into my linux machine absolutely nothing happened. It used to show the phone in the left navigation panel in my window manager but after installing MOAR ROM it was no longer detected.
Anyway, today I was trying to play Cartoon Wars 3 and since my phone is rooted it wouldn't let me play. I decided to go into the Super User app and disable it to see if the game would work and it didn't. When I went to re-enable the app it said installation failed and asked me to reboot. I clicked reboot and was sent into a boot loop. I thought okay no big deal, I'll just restore a backup in TWRP. When I go to restore the backup and select the backup file it asks which partitions to restore, but there are no boxes to check. It usually has options like system and data but now it's just blank. I tried a factory reset and I'm still in a bootloop. I'm at a complete loss. I don't know what else to do. I've tried download mode and everything but no matter what I do my phone isn't detected by my pc.
I appreciate any help. I don't know what to do. I'm out of a phone right now and don't have a backup. Not to mention I'm in between jobs right now and can't afford a new one right now.
Just flash a stock rom from sammobile.com
Pre req:
*Odin(any vers)
*Stock rom
Steps
*Extract the downloaded stock rom in your PC
*In twrp wipe everything except internal, then boot in to download mode.
*Once in download mode, connect your phone to your pc, then open Odin.
*In Odin, check the "AP" section and locate the downloaded stock rom(the extracted one)
*Hit start.
Hpe that helps
herculesPh said:
Just flash a stock rom from sammobile.com
Pre req:
*Odin(any vers)
*Stock rom
Steps
*Extract the downloaded stock rom in your PC
*In twrp wipe everything except internal, then boot in to download mode.
*Once in download mode, connect your phone to your pc, then open Odin.
*In Odin, check the "AP" section and locate the downloaded stock rom(the extracted one)
*Hit start.
Hpe that helps
Click to expand...
Click to collapse
Thank you for your reply but it seems you didn't read my post. My phone is not recognized by any pc.
What is the terminal command to restore a backup? That's pretty much my last ditch effort.
Well I broke my recovery so I'm screwed. I contacted Samsung and they said they would service it for free. Wish me luck.
What would cause the phone to stop being recognized by the PC? I narrowed it down to the MTP software or the micro usb charge port. My Windows computer says Device Descriptor Request Failed. Linux box does nothing. No USB devices are listed when I run lsblk.
weinerwad3000 said:
I'm in a big predicament. A few weeks ago I installed the MOAR ROM on my Note 5. After installing this ROM I was no longer able to connect my phone to PC. I tried a Windows 8 PC which says I have an unrecognized USB device plugged in. I tried going into Developer settings to set USB mode to MTP but the option didn't exist. I had all USB drivers installed as well. My wife's phone is recognized no problem. When plugging the phone into my linux machine absolutely nothing happened. It used to show the phone in the left navigation panel in my window manager but after installing MOAR ROM it was no longer detected.
Anyway, today I was trying to play Cartoon Wars 3 and since my phone is rooted it wouldn't let me play. I decided to go into the Super User app and disable it to see if the game would work and it didn't. When I went to re-enable the app it said installation failed and asked me to reboot. I clicked reboot and was sent into a boot loop. I thought okay no big deal, I'll just restore a backup in TWRP. When I go to restore the backup and select the backup file it asks which partitions to restore, but there are no boxes to check. It usually has options like system and data but now it's just blank. I tried a factory reset and I'm still in a bootloop. I'm at a complete loss. I don't know what else to do. I've tried download mode and everything but no matter what I do my phone isn't detected by my pc.
I appreciate any help. I don't know what to do. I'm out of a phone right now and don't have a backup. Not to mention I'm in between jobs right now and can't afford a new one right now.
Click to expand...
Click to collapse
you can try this code and test if it work
*#0808#
Familiaaa said:
you can try this code and test if it work
*#0808#
Click to expand...
Click to collapse
The phone does not boot. Recovery does not boot. The only thing the phone does is go into download mode. The phone does not connect to any computer so I cannot use odin.
weinerwad3000 said:
The phone does not boot. Recovery does not boot. The only thing the phone does is go into download mode. The phone does not connect to any computer so I cannot use odin.
Click to expand...
Click to collapse
when your phone is in download mode,it doesn't work to connect it with samsung kies on your pc?
You could try using the Kies software to reload the stock firmware. Here's an overview of what to do:
- if you don't already have the Kies software installed on your PC, download it (just search Google) and install it. The first time it runs it'll update itself to the latest version so make sure you run it once before proceeding.
- put your phone in Download mode: with the phone completely off, press and hold the Volume Down and Home and Power buttons simultaneously, and release them all when you see the Samsung splash screen
- connect the phone to your PC with the USB cable that came with the phone
-- if you've never had the phone connected to your Windows-based computer before, you'll see messages about installing drivers, etc - just wait until this is done (may take 5 or 10 minutes) [I don't know what happens if you have a Mac - it probably just works]
- in the Kies software, select the second item in the Tools menu and just follow the prompts to enter the model number (in CAPS) and IMEI/Serial Number (both found under the battery - it's ok to remove the battery at this point)
- the Kies software should start downloading the correct firmware for your phone from the Internet; once that's done (depending on your Internet connection speed) it'll begin downloading that to the phone (this probably takes 10 minutes or so)
jubei79 said:
when your phone is in download mode,it doesn't work to connect it with samsung kies on your pc?
You could try using the Kies software to reload the stock firmware. Here's an overview of what to do:
- if you don't already have the Kies software installed on your PC, download it (just search Google) and install it. The first time it runs it'll update itself to the latest version so make sure you run it once before proceeding.
- put your phone in Download mode: with the phone completely off, press and hold the Volume Down and Home and Power buttons simultaneously, and release them all when you see the Samsung splash screen
- connect the phone to your PC with the USB cable that came with the phone
-- if you've never had the phone connected to your Windows-based computer before, you'll see messages about installing drivers, etc - just wait until this is done (may take 5 or 10 minutes) [I don't know what happens if you have a Mac - it probably just works]
- in the Kies software, select the second item in the Tools menu and just follow the prompts to enter the model number (in CAPS) and IMEI/Serial Number (both found under the battery - it's ok to remove the battery at this point)
- the Kies software should start downloading the correct firmware for your phone from the Internet; once that's done (depending on your Internet connection speed) it'll begin downloading that to the phone (this probably takes 10 minutes or so)
Click to expand...
Click to collapse
Kies doesn't work either. I already tried that. When I hook up the phone It says "Device Descriptor Request Failed". It used to connect to my computers until I put MOAR ROM on the phone. Since then it stopped being recognized by my computers. There's either something wrong with the connection or something got corrupted.
weinerwad3000 said:
Kies doesn't work either. I already tried that. When I hook up the phone It says "Device Descriptor Request Failed". It used to connect to my computers until I put MOAR ROM on the phone. Since then it stopped being recognized by my computers. There's either something wrong with the connection or something got corrupted.
Click to expand...
Click to collapse
What have you already tried?
- are you sure you're using a data cable and not a charging-only cable?
- have you tried a different computer?
- have you installed the Kies software?
- what does Device Manager show when the phone is connected?
- assuming that the phone is working normally, does the phone show anything when you connect it?
- do you have try windows 8 or 10?
can be you found a solution in this forum
http://forums.androidcentral.com/sa...-not-being-recognised-download-mode-odin.html
jubei79 said:
What have you already tried?
- are you sure you're using a data cable and not a charging-only cable?
- have you tried a different computer?
- have you installed the Kies software?
- what does Device Manager show when the phone is connected?
- assuming that the phone is working normally, does the phone show anything when you connect it?
- do you have try windows 8 or 10?
can be you found a solution in this forum
http://forums.androidcentral.com/sa...-not-being-recognised-download-mode-odin.html
Click to expand...
Click to collapse
I've tried 4 different cables. My wife's S5 works perfectly fine on all computers. I have tried in Windows 7, 8, 8.1, and 10. I've also tried in Linux Mint. It used to work until I installed MOAR Rom. Windows says Device Descriptor Request Failed. Linux doesn't do anything when hooked up. lsblk doesn't show the device either.
I have a bit of an update. Apparently something happened with all my data cables. I hooked up my wife's phone the other day and I was all of a sudden receiving the same error as the note 5. I went out and bought a new data cable and now her phone connects again. I'm waiting for the Note 5 to charge up so I can try Odin. I'll post back my results.
I apologize to those who told me it was the cable. I just didn't see that it was conceivable that all 4 of my data cables were all of a sudden damaged. Never underestimate the ability of children to destroy every working cable you own.
Well I'm still getting the error. I have some usb cables coming in the mail so once i try those out I'll get back to everyone.
weinerwad3000 said:
Well I'm still getting the error. I have some usb cables coming in the mail so once i try those out I'll get back to everyone.
Click to expand...
Click to collapse
Were you able to fix your issue. I have the same issue. Note 5 N9208, I can get into Recovery (TWRP) and Download mode, but can not boot. The USB connection is showing USB Device Descriptor failed. I have tried 5 different cables and Windows 7/10 Ubuntu and cant get the phone to show up on the PC. I also have changed the USB port of the phone. Any insight would be helpful.
musab_bari said:
Were you able to fix your issue. I have the same issue. Note 5 N9208, I can get into Recovery (TWRP) and Download mode, but can not boot. The USB connection is showing USB Device Descriptor failed. I have tried 5 different cables and Windows 7/10 Ubuntu and cant get the phone to show up on the PC. I also have changed the USB port of the phone. Any insight would be helpful.
Click to expand...
Click to collapse
I ended up trying to replace the port and accidentally cut the ribbon for the LCD screen. Ended up getting a new phone.

Acidently deleted USB connection app

Hello guys,
as I wanted to delete unnecessary blow apps I think I deleted some important System app that is responsible for connecting to a PC. Now the S5 mini behaves as I it is connected to a battery charger when it is connected to a PC, there is no sign that it is recognized by the PC. I allready tried to Flash recovery with Odin but it isnt recognized by Odin too (in download mode). Am I doing something wrong? Can someone help me PLEASE get my phone working again and flash some custom ROM? Thanks in advance!!!
Try to install kies drivers for your smartphone and retry on odin. I think the only problem is the missing of the drivers
No, Kies is installed and it has no effect. Neither Kies nor the Computer recognize the phone, even on the phone theres no sign it is connected to the PC except the battery loading sign.
Try To find the drivers on google and install them. Do you have a custom recovery? If yes you can flash a custom rom
Download mode isn't related to kernel nor recovery, so unless you somehow wiped all phone's memory (all partitions) you'll still have download mode. So if you can enter Samsung's download mode and your computer doesn't recognize the phone it's one of them:
1. Bad cable, some USB cables only charge, no data connection;
2. Bad USB port on either phone or computer, try and different computer.
Good luck.

Fastboot mode not detected + MTP mode not detected

Hello,
since 2 days my MI5 is not working fine. I can plug it to the energy and charges, but when I connect it to the PC via ADB or fastboot, is not recognized, but charges.
is it possible that the usb-connector is damaged? It looks like the mobile doesn't recognize when is connected to a computer and always is on charge mode. Any ideas how can I check it?
I installed the MIUI USB Settings (https://play.google.com/store/apps/details?id=co.vincze.usbsettings&hl=es_419) and I get the message that I need to plug my mobile to the computer.
I tried with several usb - cables, and also with different computers.
I restart the mobile in fastboot mode and is not detected too, just charges.
thanks for ur help
Anyway what rom and version you're using it..?
Using original cable..?, and already check it that usb connected as MTP not just for charging in developer option..?
Did you already install all driver needed for adb and fastboot interface..i mean driver included while installing miflash tool?, also checking it under pc device manager to check that's already connect with correct driver
JJeamy said:
Anyway what rom and version you're using it..?
Using original cable..?, and already check it that usb connected as MTP not just for charging in developer option..?
Did you already install all driver needed for adb and fastboot interface..i mean driver included while installing miflash tool?, also checking it under pc device manager to check that's already connect with correct driver
Click to expand...
Click to collapse
last developer rom: MIUI 8 Global 7.1.19 | Beta
original cable + other cable.
driver installed correctly (in 3 computers) - The phone was always recognized in the 3 computers, and now is never recognized.
In pc device manager nothing is displayed.
In developer options MTP enabled.
And always is charging.
Restarting in fastboot mode, connected to computer, and also only charges, is not recognized. Is is possible that the usb-port is damaged?
ivanrsz said:
last developer rom: MIUI 8 Global 7.1.19 | Beta
original cable + other cable.
driver installed correctly (in 3 computers) - The phone was always recognized in the 3 computers, and now is never recognized.
In pc device manager nothing is displayed.
In developer options MTP enabled.
And always is charging.
Restarting in fastboot mode, connected to computer, and also only charges, is not recognized. Is is possible that the usb-port is damaged?
Click to expand...
Click to collapse
Really weird..but it's possible your usb port of your phone already broken..
Anyway how do you get using 7.1.19 beta rom..?, from updating or fresh flashing from twrp with already unlocked bootloader..?
If from twrp..how about connecting while in twrp..?, did your pc recognized it..?
JJeamy said:
Really weird..but it's possible your usb port of your phone already broken..
Anyway how do you get using 7.1.19 beta rom..?, from updating or fresh flashing from twrp with already unlocked bootloader..?
If from twrp..how about connecting while in twrp..?, did your pc recognized it..?
Click to expand...
Click to collapse
unlooking bootloader and installing twrp. after I get the updates directly from xiaomi...
ivanrsz said:
Hello,
since 2 days my MI5 is not working fine. I can plug it to the energy and charges, but when I connect it to the PC via ADB or fastboot, is not recognized, but charges.
is it possible that the usb-connector is damaged? It looks like the mobile doesn't recognize when is connected to a computer and always is on charge mode. Any ideas how can I check it?
I installed the MIUI USB Settings (https://play.google.com/store/apps/details?id=co.vincze.usbsettings&hl=es_419) and I get the message that I need to plug my mobile to the computer.
I tried with several usb - cables, and also with different computers.
I restart the mobile in fastboot mode and is not detected too, just charges.
thanks for ur help
Click to expand...
Click to collapse
Same problem here, from 3 or 4 days
Any solution to solve, please?
And neither twrp i can install

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