Totally Dead V30 after flash modem - LG V30 Questions & Answers

UPDATE!:
Solved by using remote service repair, thank you all!
Hello friends :
First, i hope you can understand me because my english is very poor.
I have a korean LG V30 V300L, so i decided to root it using this guide:
https://forum.xda-developers.com/lg-v30/how-to/korean-variant-bootloader-unlock-root-t3804505
Everithing was great, my phone was running on: Rom_LGv30_V300s_v21e_Oreo_full_stock.zip
But I realized I had no signal, even when the tutorial says that i must have, so i remembered this post:
https://forum.xda-developers.com/showpost.php?p=76585138&postcount=206
And i said: "Okay, i must flash xbl xbl2 & modem".
So i did it, i took the only kdz that i have: V300L20e_00_1218.kdz, selected the partitions and start.
When LGUP ended, the phone reboot, but nothing happened, only a black screen. There is no:
-"Warning unlocked bootloader" logo
-V30 Logo
-Recovery
-Fastboot
-Normal boot
-USB connection sound
-Also, there´s no 9008 mode
All the phone does is a black screen that shows a white line for a milisecond, and turns off, and repeat the process forever.
I really hope that you guys can help me, i'm desparate
Thank you so much.

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Try holding down power and volume down.
If you see the lg logo, hold the buttons down again. But this time, as soon as you see the lg logo, let go of volume down and power, then immediately hold down power and volume down. It should get you to recovery mode. If you have stock recovery still, preform a factory reset. That should fix it.
---------- Post added at 05:10 PM ---------- Previous post was at 05:10 PM ----------
Try holding down power and volume down.
If you see the lg logo, hold the buttons down again. But this time, as soon as you see the lg logo, let go of volume down and power, then immediately hold down power and volume down. It should get you to recovery mode. If you have stock recovery still, preform a factory reset. That should fix it.

---

danthe de la vega said:
Hello friends :
First, i hope you can understand me because my english is very poor.
I have a korean LG V30 V300L, so i decided to root it using this guide:
https://forum.xda-developers.com/lg-v30/how-to/korean-variant-bootloader-unlock-root-t3804505
Everithing was great, my phone was running on: Rom_LGv30_V300s_v21e_Oreo_full_stock.zip
But I realized I had no signal, even when the tutorial says that i must have, so i remembered this post:
https://forum.xda-developers.com/showpost.php?p=76585138&postcount=206
And i said: "Okay, i must flash xbl xbl2 & modem".
So i did it, i took the only kdz that i have: V300L20e_00_1218.kdz, selected the partitions and start.
When LGUP ended, the phone reboot, but nothing happened, only a black screen. There is no:
-"Warning unlocked bootloader" logo
-V30 Logo
-Recovery
-Fastboot
-Normal boot
-USB connection sound
All the phone does is a black screen that shows a white line for a milisecond, and turns off, and repeat the process forever.
I really hope that you guys can help me, i'm desparate
Thank you so much.
Click to expand...
Click to collapse
Not dead but hard bricked with Qualcomm USB QLD 9008. You'll need to pay for Ebay unbrick service remotely for $30-35; though the Moldova one is XDA member and will give other discount to XDA members. You'll have to install Qualcomm QLD 9008 drivers and then plug phone in and it should say this mode in Device Manger. If not you'll have to do the button dance to get it into this mode.
https://www.ebay.com/itm/Remote-Ser...794311?hash=item46994ee187:g:gd0AAOSw0qFdJi7a

---

Try holding down power and volume down.
If you see the lg logo, hold the buttons down again. But this time, as soon as you see the lg logo, let go of volume down and power, then immediately hold down power and volume down. It should get you to recovery mode. If you have stock recovery still, preform a factory reset. That should fix it.

---

19 said:
Try holding down power and volume down.
If you see the lg logo, hold the buttons down again. But this time, as soon as you see the lg logo, let go of volume down and power, then immediately hold down power and volume down. It should get you to recovery mode. If you have stock recovery still, preform a factory reset. That should fix it.
---------- Post added at 05:10 PM ---------- Previous post was at 05:10 PM ----------
Try holding down power and volume down.
If you see the lg logo, hold the buttons down again. But this time, as soon as you see the lg logo, let go of volume down and power, then immediately hold down power and volume down. It should get you to recovery mode. If you have stock recovery still, preform a factory reset. That should fix it.
Click to expand...
Click to collapse
Hi, thanks for your answer, unfortunately there is not LG logo, only a vibration when i press both buttons, but nothing appears in screen, only the white line

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HueyT said:
Not dead but hard bricked with Qualcomm USB QLD 9008. You'll need to pay for Ebay unbrick service remotely for $30-35; though the Moldova one is XDA member and will give other discount to XDA members. You'll have to install Qualcomm QLD 9008 drivers and then plug phone in and it should say this mode in Device Manger. If not you'll have to do the button dance to get it into this mode.
https://www.ebay.com/itm/Remote-Ser...794311?hash=item46994ee187:g:gd0AAOSw0qFdJi7a
Click to expand...
Click to collapse
Hi friend, can you bring me more specific instructions? I've never been in this situation before, which is the button combination?
Thanks in advance

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danthe de la vega said:
Hi friend, can you bring me more specific instructions? I've never been in this situation before, which is the button combination?
Thanks in advance
Click to expand...
Click to collapse
Per Runningxxxx:
"First, you don't need to open the phone to enter QDLoader / EDL / 9008 mode:
With the phone connected to a PC (you don't need any special software loaded, just the USB connection), and with the phone powered on and unlocked, hold vol +, vol -, and power to shutdown the phone. Keep holding them till you get a countdown on the screen. The second the countdown completes, and the screen shuts off, let go of power, keep holding vol -, and start tapping the crap out of vol +.
If you have problems getting into recovery using the key combo, this is at least 5x as hard to get it right. When you do, the screen will be blank and the phone will show up in your OS as 9008. Example in Linux:
Code:
Bus 001 Device 015: ID 05c6:9008 Qualcomm, Inc. Gobi Wireless Modem (QDL mode)
To exit 9008 if you decide not to flash anything, just press and hold vol - and power until the phone reboots.
Now, with that said, you still need the firehose. I haven't looked for it yet because I haven't needed it, but there is a V30 (all models except the H932) firehose out there somewhere. Also, of course, you need QFIL.
Now will this help -- as long as there isn't a hardware problem with your phone, you can do anything you want in QDL mode with the understanding that signatures are still checked, so you can only flash V30 (non-H932) firmware. If flashing a KDZ doesn't fix your problem, you must have a problem with a partition that doesn't get flashed from a KDZ. Unfortunately, if you don't know which one, it will be trial and error and you will need a complete dump of a V30 minus EFS.
-- Brian"
---------- Post added at 02:18 PM ---------- Previous post was at 02:13 PM ----------
I had to open my glass back using a plastic guitar pick, hair dryer to soften the glue strip along the edges of the glass back, open the back, remove the wireless charging plate by removing tiny phillips screws (7 of them), and unhook battery ribbon. Then plug in USB cable (without battery power hooked up to phone, the USB will power the phone). This then will go into Qualcomm USB QLD 9008 in Device Manager. If it still won't, then you have to use a tiny wire to short the 2 "test points" (see photo in reddit post, same on V30 as V20) before hooking up USB cable to PC while other end still in phone. Once you plug in PC end of USB cable and give the phone power, this will short the test point and put phone into QLD 9008 mode (last resort). Don't forget to install the Qualcomm QLD 9008 drivers above as some PC needs that to show up in Device Manger and Win10
https://www.reddit.com/r/lgv20/comments/9p8mn3/i_found_qualcomm_9008_test_point/

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HueyT said:
Per Runningxxxx:
"First, you don't need to open the phone to enter QDLoader / EDL / 9008 mode:
With the phone connected to a PC (you don't need any special software loaded, just the USB connection), and with the phone powered on and unlocked, hold vol +, vol -, and power to shutdown the phone. Keep holding them till you get a countdown on the screen. The second the countdown completes, and the screen shuts off, let go of power, keep holding vol -, and start tapping the crap out of vol +.
If you have problems getting into recovery using the key combo, this is at least 5x as hard to get it right. When you do, the screen will be blank and the phone will show up in your OS as 9008. Example in Linux:
Code:
Bus 001 Device 015: ID 05c6:9008 Qualcomm, Inc. Gobi Wireless Modem (QDL mode)
To exit 9008 if you decide not to flash anything, just press and hold vol - and power until the phone reboots.
Now, with that said, you still need the firehose. I haven't looked for it yet because I haven't needed it, but there is a V30 (all models except the H932) firehose out there somewhere. Also, of course, you need QFIL.
Now will this help -- as long as there isn't a hardware problem with your phone, you can do anything you want in QDL mode with the understanding that signatures are still checked, so you can only flash V30 (non-H932) firmware. If flashing a KDZ doesn't fix your problem, you must have a problem with a partition that doesn't get flashed from a KDZ. Unfortunately, if you don't know which one, it will be trial and error and you will need a complete dump of a V30 minus EFS.
-- Brian"
---------- Post added at 02:18 PM ---------- Previous post was at 02:13 PM ----------
I had to open my glass back using a plastic guitar pick, hair dryer to soften the glue strip along the edges of the glass back, open the back, remove the wireless charging plate by removing tiny phillips screws (7 of them), and unhook battery ribbon. Then plug in USB cable (without battery power hooked up to phone, the USB will power the phone). This then will go into Qualcomm USB QLD 9008 in Device Manager. If it still won't, then you have to use a tiny wire to short the 2 "test points" (see photo in reddit post, same on V30 as V20) before hooking up USB cable to PC while other end still in phone. Once you plug in PC end of USB cable and give the phone power, this will short the test point and put phone into QLD 9008 mode (last resort). Don't forget to install the Qualcomm QLD 9008 drivers above as some PC needs that to show up in Device Manger and Win10
https://www.reddit.com/r/lgv20/comments/9p8mn3/i_found_qualcomm_9008_test_point/
Click to expand...
Click to collapse
Thank you so much for your patience friend, i will try it tonight. Unfortunately my phone won't boot, so i can't see the countdown. Is there any way to enter on 9008 mode with the phone completely turned off?
Also, i've sended message to the vendor of your link, i'm waiting for his response, thank you so much :highfive:

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danthe de la vega said:
Thank you so much for your patience friend, i will try it tonight. Unfortunately my phone won't boot, so i can't see the countdown. Is there any way to enter on 9008 mode with the phone completely turned off?
Also, i've sended message to the vendor of your link, i'm waiting for his response, thank you so much :highfive:
Click to expand...
Click to collapse
If the button dance does not work, then you'll have to open the back and disconnect battery ribbon. While battery is unconnected, hold vol. Up and plug in usb-c cable (assuming you already installed Qualcomm qld 9008 drivers, win10 PC running with usb-c cable plugged into usb2 port, not usb3, and Device Manager opened). QLD 9008 will pop up on windows 10 screen.

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I have this problem when i 1st root my korean model v300s last 2 years ago is tottally hard brick already i bring to lg service center and they change some chip part inside and it works again. I remember i flash modem also to get signal that time. Im luck i stay i korea so everywhere service center and is free hahaha

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I stuck my phone in the drawer for an entire year because of this.
I just paid to have it fixed, didn't know there's a public firehose out there.

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Duo8 said:
I stuck my phone in the drawer for an entire year because of this.
I just paid to have it fixed, didn't know there's a public firehose out there.
Click to expand...
Click to collapse
I think I'm going the same way, but there's a big problem, i can't even get into 9008 mode

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darkidz555 said:
I have this problem when i 1st root my korean model v300s last 2 years ago is tottally hard brick already i bring to lg service center and they change some chip part inside and it works again. I remember i flash modem also to get signal that time. Im luck i stay i korea so everywhere service center and is free hahaha
Click to expand...
Click to collapse
Congrats for that friend, so bad i'm from Mexico, but i think i can still get the remote service, isn't it?

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danthe de la vega said:
Congrats for that friend, so bad i'm from Mexico, but i think i can still get the remote service, isn't it?
Click to expand...
Click to collapse
Yep. EBay. Mention xda and moldova guy will give u discount

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danthe de la vega said:
I think I'm going the same way, but there's a big problem, i can't even get into 9008 mode
Click to expand...
Click to collapse
Now that the button combination to enter 9008 is found, you can just press a few buttons to enter 9008 anytime.
If you're going for remote service the guy servicing will tell you.

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HueyT said:
Yep. EBay. Mention xda and moldova guy will give u discount
Click to expand...
Click to collapse
Ok so, as Duo8 said, i can say moldova that i can't enter in 9008 mode and he can still help me? I know I insisting with this, but i don't want him to waste his time

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danthe de la vega said:
Ok so, as Duo8 said, i can say moldova that i can't enter in 9008 mode and he can still help me? I know I insisting with this, but i don't want him to waste his time
Click to expand...
Click to collapse
Yes, Moldova eBay service can help u get into qld 9008 mode

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HueyT said:
Yes, Moldova eBay service can help u get into qld 9008 mode
Click to expand...
Click to collapse
thank you so much for everything, my phone is alive again, thanks to Moldova guy and you ! :highfive:

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Great. Samsung and LG have Octoplus box JTAG rescues whereas others don't sell the firehose files to Octoplus and keep them hidden as "proprietary"