Did you get the message: Magic Value Mismatch:-.-.-.-.-.-?!
After flashing a new recovery it happens sometimes.
GREEN ZONE
Are you able to go to the recocery menu(power + vol up)? If not, go to BLUE ZONE. If yes, follow these steps
1. check whether you have copied your rom as "update.zip" to your SD card's root directory
2. Go to recovery menu and install update.zip
BLUE ZONE
You may did something wrong while flashing a new recovery. Here is the right method:
1. go back to fastboot mode(power+power+power+vol up) and type these commands on your PC
2. fastboot erase userdata
3. fastboot erase system
4. fastboot erase cache
5. fastboot erase linux
6. fastboot erase recovery
7. fastboot flash recovery recovery.img (change path, if recovery.img is not in the same directory as fastboot.exe)
8. fastboot reboot
Are you able now to go to the recovery menu? If yes, go to GREEN ZONE and follow steps. If not, go to ORANGE ZONE.
ORANGE ZONE
Are able to unpack the update.zip and find the system.img and boot.img files? If not, then go to RED ZONE. If yes, copy these 2 files to the directory where the fastboot.exe is, run these commands:
1. fastboot erase recovery
2. fastboot flash recovery recovery.img
3. fastboot -w
4. fastboot erase linux
5. fastboot erase system
6. fastboot flash system system.img
7. fastboot flash linux boot.img
8. fastboot reboot
ROM is installed. Enjoy it!
RED ZONE
Make sure, that you copied the same recovery.img to fastboot folder, that you had flashed before to your tablet.
Type this command in recovery mode:
1. fastboot boot recovery.img
This command will run the recovery from your PC. After the recovery menu is booted, go to GREEN ZONE and enjoy your ROM!
If this was helpful to you, please do not hesitate to click on Thanks!
Lol, nice to see my post copy/pasted without any links indicated. Anyway, I hope It's helpful for ppl.
Tried following these steps, however, I'm still getting this error... followed this thread
http://forum.xda-developers.com/showthread.php?t=1470823
installed recovery successfully (via fastboot), and update seems to install fine, until I reboot and get the "Magic Value Mismatch" again..
Any ideas?
yellowumbrella said:
Tried following these steps, however, I'm still getting this error... followed this thread
http://forum.xda-developers.com/showthread.php?t=1470823
installed recovery successfully (via fastboot), and update seems to install fine, until I reboot and get the "Magic Value Mismatch" again..
Any ideas?
Click to expand...
Click to collapse
So you installed the recovery via fastboot. Did you manage to boot into recovery mode?
I had that issue, that I couldn't boot into recovery mod from my Folio, by pressing power+Up button. Thats why I added the RED ZONE method. Its like booting recovery from your PC. (fastboot boot recovery.img). All the times I wanna upgrade my current ROM, I have to do this step, because the power+up does not work, and the Folio skips booting in recovery and wanna do normal booting. However there is no Rom installed on machine, so I get the magic value mismatch message.
So try to boot recovery from your PC, but be sure you have copied to your fastboot folder the same recovery, that you flashed onto the tablet.
I hope it was helpful. If something is not clear, feel free to ask.
Hi there, thanks for the answer.
I am able to install recovery images via fastboot.
Device is showing up as a question mark with >fastboot devices
but recovery installs fine. CWM gives a series of e: can't opne/mount /cache errors.
Foliomod 1.4 installs no problem, thanks to the method here
http://forum.xda-developers.com/showthread.php?t=1458876
yellowumbrella said:
Hi there, thanks for the answer.
I am able to install recovery images via fastboot.
Device is showing up as a question mark with >fastboot devices
but recovery installs fine. CWM gives a series of e: can't opne/mount /cache errors.
Foliomod 1.4 installs no problem, thanks to the method here
http://forum.xda-developers.com/showthread.php?t=1458876
Click to expand...
Click to collapse
Are you able to wipe cache from recovery? And what else errors are listed?
One more thing, try to flash your boot.img and system.img via fastboot as written above.
If I follow this
http://forum.xda-developers.com/showthread.php?t=1458876
and let it install cwm v 3, I get the cache error and cannot wipe or mount via recovery.
If I follow the ICS thread, and flash the new cwm v5 via fastboot, I don't get the cache error, but the rom simply won't start. If I open the package, there is a boot.img, but not a system.img, just a system folder...
I could try flashing boot.img, but I don't see how that could help
yellowumbrella said:
If I follow this
http://forum.xda-developers.com/showthread.php?t=1458876
and let it install cwm v 3, I get the cache error and cannot wipe or mount via recovery.
If I follow the ICS thread, and flash the new cwm v5 via fastboot, I don't get the cache error, but the rom simply won't start. If I open the package, there is a boot.img, but not a system.img, just a system folder...
I could try flashing boot.img, but I don't see how that could help
Click to expand...
Click to collapse
Well just to see it clear. So you are able to install Foliomod 1.4, so your Internal storage is not broken.
When I get home, I will check the system folder of ICS rom. There are some method to create system.img from an unpacked folder...
So, in CWM 5.5.0.4 you manage to install Zip from SD card, ROM and GAPPS as well, but the Rom does not boot?!
yup, that's exactly it.
Haven't tried installing Gapps since I can't even get the rom to boot.
I have a perfectly working tablet with foliomod 1.4, and I did get honeycomb to run but some apps crashed so I reverted back to foliomod.
with CWM CWM 5.5.0.4 everything seems to work great, except at reboot, nothing happens (somehow, I no longer even get the magic value mismatch)
------------------
PS. not sure if this is at all relevant, but I cannot fastboot from win7, I'm fastbooting in either ubuntu or xp via VirtualBox, and the device, when calling >fastboot devices shows up as ?????????? (ubuntu) and ? (xp)... :\
yellowumbrella said:
yup, that's exactly it.
Haven't tried installing Gapps since I can't even get the rom to boot.
I have a perfectly working tablet with foliomod 1.4, and I did get honeycomb to run but some apps crashed so I reverted back to foliomod.
with CWM CWM 5.5.0.4 everything seems to work great, except at reboot, nothing happens (somehow, I no longer even get the magic value mismatch)
------------------
PS. not sure if this is at all relevant, but I cannot fastboot from win7, I'm fastbooting in either ubuntu or xp via VirtualBox, and the device, when calling >fastboot devices shows up as ?????????? (ubuntu) and ? (xp)... :\
Click to expand...
Click to collapse
Try to install gapps as well. Maybe it helps...
nope, no luck even with gapps installed..
just a blank screen..
sigh
yellowumbrella said:
nope, no luck even with gapps installed..
just a blank screen..
sigh
Click to expand...
Click to collapse
Have you tried all the roms? ICS Alpha 1,2,3 and 4?
Tried 3 and 4, didn't bother trying earlier ones, as it seems the latest ones work for most users
yellowumbrella said:
nope, no luck even with gapps installed..
just a blank screen..
sigh
Click to expand...
Click to collapse
Hmmm strange. I ask it for you on developers forum. What you can still do, is to check the steps, that you did them correctly. In most of the cases users forget something, or do some steps incorrectly.
Try to erase userdata, cache, system, linux and recovery in fastboot. You mentioned you had problem with fastboot under Win7. Problem may occur, in case of not proper erasing.
Thanks, I'll give it another try tonight.
Fastboot in win7 is simply not seeing the device. It shows up in XP and Ubuntu, but as "??????" - not sure if that could be a symptom.
I'll post a reply as soon as I've tried, and let you know how it went.
yellowumbrella said:
Thanks, I'll give it another try tonight.
Fastboot in win7 is simply not seeing the device. It shows up in XP and Ubuntu, but as "??????" - not sure if that could be a symptom.
I'll post a reply as soon as I've tried, and let you know how it went.
Click to expand...
Click to collapse
For me it works perfectly on Win7. After Installing SDK and JDK the in the devicemanager it is shown as an Unknown device. Simply add the driver manually to it.
Download driver from attachment.
Copy it to SDK\USB_driver folder
That works for me. After its done, the Folio is shown as "Fastboot" in device manager. But connect the tablet in fastboot mode to your PC before you add driver manually to it.
Thanks for that.
Tried it, still not working in win7. It shows up correctly in device manager, but fastboot itself just doesn't want to see it...
I've attached a screenshot for you
EDIT: screenshot gets resized, but it shows device manager listing
NVIDIA Android Fastboot Device
and a terminal with fastboot not seeing the device
yellowumbrella said:
Thanks for that.
Tried it, still not working in win7. It shows up correctly in device manager, but fastboot itself just doesn't want to see it...
I've attached a screenshot for you
EDIT: screenshot gets resized, but it shows device manager listing
NVIDIA Android Fastboot Device
and a terminal with fastboot not seeing the device
Click to expand...
Click to collapse
When You have win7, You have run the console as admin!
Or copy the complete Fastboot folder to another Destination like c:\temp...
Thanks stefannsv, tried it, still not showing...
But I can access fastboot on another platform, so I assume it's not an issue, I can just switch over to another OS to flash
no go, followed both this original post (tried all steps except orange, cause the rom I'm trying to install has a system folder, not a system.img)
Last method I tried was:
1) boot into fastboot
2) boot cwm-recovery-5.5.0.4.img directly from PC
3) wipe data/factory reset
4) wipe cache partition
5) install zip from SD card and chose the alpha 4 release
installing update...
then back to recovery, reboot and voilà... magic value mismatch again (it had disappeared for a while... )
Also, when booting into CWM 3.0.0.5, I get a series of "E: Can't mount/cache/recovery" type errors.. could this be related?
booting directly into recovery from PC doesn't alllow me to install any ROMS, not even foliomod 1.4 which works if using puppet13th's method
Hi,
I'm currently trying to install CyanogenMod onto my HTC One X+, but keep running into problems.
I unlocked the bootloader, and installed TWRP v2.8.7.0.
I went into recovery fine, and used "adb push" to push cm-11-20150906-NIGHTLY-enrc2b.zip onto the device and install it through TWRP.
I then tap "reboot" but it always tells me that "No OS Installed", and rebooting into the bootloader to flash the boot.img and erase the cache doesn't seem to fix this issue.
I've tried a few different versions of recoveries, like CyanogenMod's recovery, but still can't seem to get it to install any OS. Always just get stuck on the HTC logo.
Am I missing an important step, or something? Thanks for your time.
hmm...sounds correct. just try it again.
1. boot into bootloader
2. flash the boot.img from the zip you want to install (for cm11 i recommend to flash nik3rs kernel http://forum.xda-developers.com/showthread.php?t=2012320)
3. reboot into recovery
4. select wipe from twrp menu
5. install the zip
6. reboot
why dont you try cm12? much better performance!
.
el-Loko said:
hmm...sounds correct. just try it again.
1. boot into bootloader
2. flash the boot.img from the zip you want to install (for cm11 i recommend to flash nik3rs kernel http://forum.xda-developers.com/showthread.php?t=2012320)
3. reboot into recovery
4. select wipe from twrp menu
5. install the zip
6. reboot
Click to expand...
Click to collapse
Ok, I tried again.
I went into the bootloader and flashed boot.img.
Then went into recovery, and did a factory reset via the wipe menu.
Then used "adb push" to push cm-11.zip to my /sdcard/.
Then I installed the zip without any issues.
But then when restarting, it still warned me no OS was installed.
Booting anyways just got me stuck at the HTC logo.
I then tried again, this time flashing the kernel with Nik3r's file.
And then doing all the same stuff as before, but still getting the no OS was installed message and stuck on the HTC logo.
Perhaps it's the ROM I'm using? I'm not sure why it's telling me "no OS is installed" right after installing one.
el-Loko said:
why dont you try cm12? much better performance!
Click to expand...
Click to collapse
I actually can't find a ROM for CM12. I just grabbed the latest from http://download.cyanogenmod.org/?device=enrc2b.
KindDino said:
Ok, I tried again.
I went into the bootloader and flashed boot.img.
Then went into recovery, and did a factory reset via the wipe menu.
Then used "adb push" to push cm-11.zip to my /sdcard/.
Then I installed the zip without any issues.
But then when restarting, it still warned me no OS was installed.
Booting anyways just got me stuck at the HTC logo.
Click to expand...
Click to collapse
I never used "adb push" to push the ROM installation .zip onto my phone.
If you've made a nandroid backup, then go back to stock and give it a try to transfer the .zip in normal USB/Phone mode.
Afterwards repeat the process as described above.
When I flashed my last CM11 ROM, I used CWM as recovery and I flashed the boot.img after full wipe and rom/gapps installation.
After flash process I restarted the phone into bootloader and flashed the boot.img via adb. Then first normal reboot of the phone.
Worked without any issues...
KindDino said:
I actually can't find a ROM for CM12. I just grabbed the latest from http://download.cyanogenmod.org/?device=enrc2b.
Click to expand...
Click to collapse
http://forum.xda-developers.com/htc...ent/rom-cyanogenmod-12-international-t2948462
Njoatun said:
I never used "adb push" to push the ROM installation .zip onto my phone.
If you've made a nandroid backup, then go back to stock and give it a try to transfer the .zip in normal USB/Phone mode.
Afterwards repeat the process as described above.
Click to expand...
Click to collapse
Sadly, I didn't know to make a backup when I started, so I cannot go back to stock at this time.
Njoatun said:
When I flashed my last CM11 ROM, I used CWM as recovery and I flashed the boot.img after full wipe and rom/gapps installation.
After flash process I restarted the phone into bootloader and flashed the boot.img via adb. Then first normal reboot of the phone.
Worked without any issues...
http://forum.xda-developers.com/htc...ent/rom-cyanogenmod-12-international-t2948462
Click to expand...
Click to collapse
I tried with TWRP again and actually decided to write down the entire log for installing the zip, maybe that'll help. It does say some things about errors, unsure if they're actual bad, or not, as it does succeed.
Of course after installing the zip, I selected 'Reboot' then 'Reboot into Bootloader', then used 'fastboot flash' to flash the boot.img with the boot.img from within the cm-12.zip.
Code:
Installing '/sdcard/cm-12.zip'..
Check for MD5 file..
Skipping MD5 check: no MD5 file found
could not detect filesystem for /dev/block/platform/sdhci-tegra.3/by-name/APP, assuming ext4
mount: failed to mount /dev/block/platform/sdhci-tegra.3/by-name/APP at /system: Invalid argument
unmount of /system failed; no such volume
Patching system image unconditionally...
could not detect filesystem for /dev/block/platform/sdhci-tegra.3/by-name/APP, assuming ext4
mount: failed to mount /dev/block/platform/sdhci-tegra.3/by-name/APP at /system: Invalid argument
unmount of /system failed: no such volume
script succeeded: result was [0.200000]
Updating partition details...
E:unable to mount '/system'
E:unable to mount '/cache'
...done
I tried CWM a few days ago while attempting this ( as it's linked in the CyanogenMod wiki ), and I just attempted it again with it and still cannot get past the logo.
Here is the log from CWM.
Code:
-- Installing: /sdcard/cm-12.zip
Finding update package...
OPening update package...
Installing update...
detected filesysystem extr4 for /dev/block/platform/sdhci-tegra.3/by-name/APP
Patching system image unconditionally...
detected filesysystem extr4 for /dev/block/platform/sdhci-tegra.3/by-name/APP
script succeeded: result was [0.200000]
Install from sdcard complete.
When rebooting back into the bootloader, I got an error about lost root access. I selected yes.
Code:
Root access possibly lost. Fix? THIS CAN NOT BE UNDONE.
- No
- Yes - Fix root (/system/xbin/su)
Seems like you've wiped your internal SD card partition, if it's unable to detect the ext4 format.
It's mentioned under Post 2 http://forum.xda-developers.com/showthread.php?t=2066390
If so... Search the forum for a solution. Never had this issue. Good luck
Njoatun said:
Seems like you've wiped your internal SD card partition, if it's unable to detect the ext4 format.
It's mentioned under Post 2 http://forum.xda-developers.com/showthread.php?t=2066390
If so... Search the forum for a solution. Never had this issue. Good luck
Click to expand...
Click to collapse
I read the post, and maybe I did wipe my SD Card. I have no idea on how to fix that, and I'll have to research more.
I would like to just use Hasoon2000's toolkit but sadly can't find a working download for it.
Same problem here! Nothing is working. It is saying no OS. Always booting into fastboot mode. Someone help. I have a Moto G3 1540
---------- Post added at 11:27 AM ---------- Previous post was at 11:18 AM ----------
Follow these steps and recover your device.
1. Unlock your bootloader if you have it locked
2. Boot into TWRP
3. Go to Wipe
4. Go to Advanced
5. Select everything except USB - OTG and SD Card
6. Boot into fastboot
7. Download the stock image of your phone
8. Flash it to your phone ( Please find it online)
9. After flashing do not reboot!!!
10. Download Cyanogenmod recovery and flash it to your device.
11. Boot into the newly installed recovery.
12. Go into Apply Update
13. Go into Apply Update from ADB
14. Sideload the Cyanogenmod using the command adb sideload filename.zip ( Replace filename with the name of your zip)
15. After Sideloading, boot into fastboot mode.
16. In fastboot mode, Select BP Tools.
17. Boom! Your device will start booting
Hope this helps you:good::good:
I had the same issue - here's how I went about this...
KindDino said:
Hi,
I'm currently trying to install CyanogenMod onto my HTC One X+, but keep running into problems.
I unlocked the bootloader, and installed TWRP v2.8.7.0.
I went into recovery fine, and used "adb push" to push cm-11-20150906-NIGHTLY-enrc2b.zip onto the device and install it through TWRP.
I then tap "reboot" but it always tells me that "No OS Installed", and rebooting into the bootloader to flash the boot.img and erase the cache doesn't seem to fix this issue.
I've tried a few different versions of recoveries, like CyanogenMod's recovery, but still can't seem to get it to install any OS. Always just get stuck on the HTC logo.
Am I missing an important step, or something? Thanks for your time.
Click to expand...
Click to collapse
I have a Nexus 7 2013 that I commonly use as both my daily driver (tablet-only) and as my ROM-testing guinea-pig. I had AOSP Android 7 installed before I wiped everything, due to an issue with Google Play (which I just couldn't fix for the life of me). When I went to flash a new ROM (AOSP Android 7.1.1), TWRP claimed that there was 'No OS'. This would mean that you definitely wiped everything - possibly including the partitions. My guess is:
If there are no partitions (esp. System, Recovery, Boot, Cache, etc.), the data meant for them may still get written to the device's storage. But the bootloader/kernel won't recognize where to pass the torch to when it's time for the system/userspace to come in.
In order to get this back , you may need either:
A) a ROM that has images for at least the System, Cache, and Boot partitions (add your own recovery if need-be).
B) a Stock ROM from the manufacturer's website, which tends to come with all of these images ready in the .zip
Once you flash one of those, you should confirm that your bootloader is unlocked. Once that is done, flash the ROM of your dreams
I hope this helped...
TWRP bootloop
el-Loko said:
hmm...sounds correct. just try it again.
1. boot into bootloader
2. flash the boot.img from the zip you want to install (for cm11 i recommend to flash nik3rs kernel http://forum.xda-developers.com/showthread.php?t=2012320)
3. reboot into recovery
4. select wipe from twrp menu
5. install the zip
6. reboot
why dont you try cm12? much better performance!
.
Click to expand...
Click to collapse
I have quite same issue.
I have TWRP 3.0.3 (that's the only version that i found and works) on my Doogee X9 Pro (MTK chip inside).
But after flashing successfully a ROM it still reboots to the recovery. (I tried it with 3 different ROMs.)
Any idea what else should/could try?
I wanted to get rid of the Chinese bloatware that came with the phone and decided to install the xiaomi.eu rom.
This is what I did;
unlock the bootloader
downloaded TWRP from official website (3.2.1-0)
installed TWRP with adb, reboot into TWRP with VolUp+Power buttons combination
factory reset and clean data partition
reboot
PROBLEM 1: stuck at MI logo... I said "whataver" and reboot into TWRP
plugged into PC, and transferred rom into internal memory manually
PROBLEM 2: I couldn't push with adb because the device is not recognised in fastboot
in TWRP press install, try to install rom zip
PROBLEM 3: get error 7 message "This package is for device gemini.."
I say "whatever" and download global stable rom from MIUI
did another system data cache clean, tried to install rom
PROBLEM 4: "unmount of /firmware failed: no such volume" "mount:failed to mount /dev/block/bootdevice/by-name/sec at /firmware: invalid argument"
It says "scripting succeeded: result was [1.000000] Updating partition details...done", but when I reboot I'm stuck at the MI logo again!
Any help is very appreciated!
tryhardernow said:
I wanted to get rid of the Chinese bloatware that came with the phone and decided to install the xiaomi.eu rom.
This is what I did;
unlock the bootloader
downloaded TWRP from official website (3.2.1-0)
installed TWRP with adb, reboot into TWRP with VolUp+Power buttons combination
factory reset and clean data partition
reboot
PROBLEM 1: stuck at MI logo... I said "whataver" and reboot into TWRP
plugged into PC, and transferred rom into internal memory manually
PROBLEM 2: I couldn't push with adb because the device is not recognised in fastboot
in TWRP press install, try to install rom zip
PROBLEM 3: get error 7 message "This package is for device gemini.."
I say "whatever" and download global stable rom from MIUI
did another system data cache clean, tried to install rom
PROBLEM 4: "unmount of /firmware failed: no such volume" "mount:failed to mount /dev/block/bootdevice/by-name/sec at /firmware: invalid argument"
It says "scripting succeeded: result was [1.000000] Updating partition details...done", but when I reboot I'm stuck at the MI logo again!
Any help is very appreciated!
Click to expand...
Click to collapse
Well, you need here some corrections to do things in the right way.
In the 3rd step you say that installed twrp through adb but twrp can´t be installed through adb; maybe you wanted to mean fastboot that is other thing.
In the 4th step most important is at first reboot to twrp swipe to allow modifications and then you have to perform "format data" to can reboot normally to system although some times is required no-verity zip for R5P vince (just Google) some users refer that is needed despite I never did.
In the 8th step; fastboot mode can´t work simultaneously meanwhile are you using adb so you don´t need it when you are using adb although this you can´t transfer a file from pc to your device using simply adb; you need to enable first in advanced options from twrp the feature adb sideload then placing the file that you want to transfer from pc to device in the same adb folder you have to type in a terminal with admin rights adb sideload nameoffile.zip but this is not to transfer a file only but to transfer it and flash it onto device.
In the 10th step first open the zip file of the rom with notepad++, go to META-INF/com/google/android/updater-script and check what device is it made for and additional you can browse to system/build.prop and similarly open it and check ro.product/model cause gemini is other variant.
So I think that you flashed firstly a rom for other device and maybe you need to restore some partitions to correct this using MiFlash tool.
But first to this if most of all partitions are working and not damaged you can flash almost any partition through fastboot mode, unzip the rom in the same adb folder and type every file for every partition one by one but maybe you need only system, boot and userdata partitions so try first these three, I hope that you know syntax of fastboot commands.
Hi all,
I appear to have done something wrong when flashing my device with boombox and flashing twrp. I seem not to be able to access recovery so I can update my boombox rom. I have tried button combinations, I have tried fastboot boot twrp.img in bootloader which just reboots my system, I have tried booting directly from home screen using adb which registers an error and I have tried re-flashing but unfortunately I cannot access recovery.
Any way I can get into recovery without erasing my data?
Jonnibravo said:
Hi all,
I appear to have done something wrong when flashing my device with boombox and flashing twrp. I seem not to be able to access recovery so I can update my boombox rom. I have tried button combinations, I have tried fastboot boot twrp.img in bootloader which just reboots my system, I have tried booting directly from home screen using adb which registers an error and I have tried re-flashing but unfortunately I cannot access recovery.
Any way I can get into recovery without erasing my data?
Click to expand...
Click to collapse
If you're rooted, give the reboot recovery app you installed after bootloader unlock root privileges.
If not then use the exact same PC ADB commands to boot to TWRP like during bootloader unlock.
I'm confused why you mention flashing TWRP after Boombox. Surely you didn't do that. You already had TWRP.
I am rooted, Recovery reboot just reboots the phone, I have tried to get into twrp by reinstalling but again does the same things just reboots the system after the corruption warning screen. I've also tried to install from the bootloader with the fastboot boot twrp.img command but it simply says waiting for device.
Sorry turns out I was flashing the wrong file from another tutorial, I was flashing 3.1.1 instead of 3.2.1
Jonnibravo said:
Sorry turns out I was flashing the wrong file from another tutorial, I was flashing 3.1.1 instead of 3.2.1
Click to expand...
Click to collapse
Then you didn't follow my bootloader unlock and root guide. I never mention that other TWRP, much less link to it.
You're going to have to load into Download mode and use fastboot commands, but you say you couldn't get past flashing TWRP.
Uninstall the LG Mobile Driver if you have them, then reinstall.
1st, reboot into OS, then open up Device Manager and change view to Show hidden devices. You should see a new category named 'ADB Interface' and underneath that 'Fastboot Interface (Google USB ID)'.
If not, you will also see 'ADB Device' for Other Devices category:
right click that to update driver software ---> Browse my computer for driver software ---> Let me pick from a list... ---> Show all Devices ---> Have Disk ---> Browse ---> C:\Program Files (x86)\LG Electronics\LG Mobile Driver ---> 'lgandbus' ---> 'LGE ADB Mobile Interface'
Download adb/fastboot software, download Joan TWRP 3.2.1 img file and place it in adb/fastboot folder, then send your phone into Download mode:
Open up cmd and type the following after changing directory to Adb/fastboot folder: fastboot devices (see if your device is there), fastboot flash recovery TWRP.img or (whatever file is named).img, then fastboot boot TWRP.img or (whatever file is named).img