Develop Bugs

G Pad Won't Respond - No Dowload Mode

Okay so i was on Marsh mellow 6.0.1 and then the tablet died due to battery running out. Once i rebooted it, it was stuck at the LG logo and said something like "No Secure Booting". It just froze. Then i got into download mode, opened LG Support Tool and tried Updating Software as i have had this exact problem before and this worked last time. However this time it got to around 83% then the tablet lost connection. Ive tried this multiple times now and every 4-5Mins it just disconnects.
However after many failed attempts it now doesn't enter download mode, doesn't make sound when connected to PC and doesn't show any life.
also cannot access TWRP
any help would be appreciated!

In Windows' Device Manager, does the tablet show up in the Modem or Ports section? If it shows up as "QHSUSB_BULK 9008", Google that and at least if you have a TOT file available for your particular model and variant, then you should be able to recover using directions/program you can find.

I have the same problem with a G Pad of mine. It was working fine, boot looped (with 50% battery) then switched off. No life at all, no amount of button combinations or charged plugging in will bring it back. I've resorted to finding a donor motherboard to see if it'll work with a new motherboard or if some other component is at fault!

Rackers said:
I have the same problem with a G Pad of mine. It was working fine, boot looped (with 50% battery) then switched off. No life at all, no amount of button combinations or charged plugging in will bring it back. I've resorted to finding a donor motherboard to see if it'll work with a new motherboard or if some other component is at fault!
Click to expand...
Click to collapse
Did you check what I said in my post previous to yours?

roirraW "edor" ehT said:
Did you check what I said in my post previous to yours?
Click to expand...
Click to collapse
Hi,
Yes, nothing in device manager under Modem or Ports. I don't get any noise when I plug or unplug it either so the computer isn't seeing it.

Rackers said:
Hi,
Yes, nothing in device manager under Modem or Ports. I don't get any noise when I plug or unplug it either so the computer isn't seeing it.
Click to expand...
Click to collapse
That sucks, mate. Sorry to hear that! Good luck with the motherboard angle.

Thanks, fingers crossed!

roirraW "edor" ehT said:
That sucks, mate. Sorry to hear that! Good luck with the motherboard angle.
Click to expand...
Click to collapse
Just to confirm; new motherboard has worked, tablet is now back to life. Not sure what could have happened to the old one but I did buy this second hand and it was a prone crasher and the tablet had already been opened so who knows what they did to it.

Rackers said:
Just to confirm; new motherboard has worked, tablet is now back to life. Not sure what could have happened to the old one but I did buy this second hand and it was a prone crasher and the tablet had already been opened so who knows what they did to it.
Click to expand...
Click to collapse
Good! Thanks for the update!

Rackers said:
Just to confirm; new motherboard has worked, tablet is now back to life. Not sure what could have happened to the old one but I did buy this second hand and it was a prone crasher and the tablet had already been opened so who knows what they did to it.
Click to expand...
Click to collapse
I'm curios where you and aprox how much did you pay for the new hardware? Hopefully you it's not too rude of me to ask...
Thanks in advance

Sparks639 said:
I'm curios where you and aprox how much did you pay for the new hardware? Hopefully you it's not too rude of me to ask...
Thanks in advance
Click to expand...
Click to collapse
Not at all; I paid £50 for the new motherboard. Just luck of the draw somebody was selling a G Pad with a broken screen on eBay.
Thanks

Thank you, I'll keep an eye out.
Sent from my Nexus 6 using Tapatalk

Update!!
Currently got the tablet back into working order no replacement hardware needed.
Problem:
Tablet not responding to any user input or software detection. not charging and no life of any sort.
Solution:
( 1 )Charge tablet with a powerful legitimate LG charger (not a cheap Chinese knockoff).
( 2 )Leave on charge for at least 1 and a half days.
( 3 )Press power button to check if device powers, if not continue.
( 4 )Connect USB to PC, Press and hold Volume Up and Down simultaneously and insert USB into charger port.
( 5 )Download mode should appear and you'll be able to flash stock from LG Support Tools or LG Flash Tool
Disclaimer:
May not work for all as some problems may occur for different reasons.
~Happy Un-Bricking!

i've been blue screen'd D:

on saturday my phone suddenly shut off and shows no signs of life except the lg logo and then a blue screen sometimes. can anyone confirm the whole "putting the mainboard in the oven" thing to actually work? and if yes, how exactly should i do it?

Quote100 said:
on saturday my phone suddenly shut off and shows no signs of life except the lg logo and then a blue screen sometimes. can anyone confirm the whole "putting the mainboard in the oven" thing to actually work? and if yes, how exactly should i do it?
Click to expand...
Click to collapse
That sounds a little extreme TBH with you. I've only heard of people doing the oven trick for the flickering LCD fix, but I haven't paid too much attention lately so I could be wrong.
Please provide more info:
d850 rt? still on fulmics? can you manually boot into recovery(doubt it if you're blue screened but had to ask)? have you tried flashing a TOT or KDZ and going back to stock yet?

startswithPendswithOOH said:
That sounds a little extreme TBH with you. I've only heard of people doing the oven trick for the flickering LCD fix, but I haven't paid too much attention lately so I could be wrong.
Please provide more info:
d850 rt? still on fulmics? can you manually boot into recovery(doubt it if you're blue screened but had to ask)? have you tried flashing a TOT or KDZ and going back to stock yet?
Click to expand...
Click to collapse
yes d850 and yes i am still on fulmics but according to numerous other threads on different forums, this isn't a software issue. I can't get into download mode at all as the phone shows no signs of life when the power button is pressed or when its plugged in

Board expired
Quote100 said:
yes d850 and yes i am still on fulmics but according to numerous other threads on different forums, this isn't a software issue. I can't get into download mode at all as the phone shows no signs of life when the power button is pressed or when its plugged in
Click to expand...
Click to collapse
It's time to move on.same happened to me a week ago.and I found the reason that my charger was at fault .the charger damaged one of the ics.it causes the board to draw a lot of current and causing severe heating issue within seconds.
So,better buy a new phone.

Quote100 said:
yes d850 and yes i am still on fulmics but according to numerous other threads on different forums, this isn't a software issue. I can't get into download mode at all as the phone shows no signs of life when the power button is pressed or when its plugged in
Click to expand...
Click to collapse
Welp...that doesn't sound good. One last question(i think you already answered, but double checking)- so with power off, plugging the usb cable into a pc & holding vol up does nothing at all?
I guess if you're in "last resort mode" the oven may be the way to go, but I have not done it myself so I can't help much there. Here's a post from someone who had success using the oven... http://forum.xda-developers.com/showpost.php?p=68235296&postcount=7
I'd be nervous and would do it as the absolute last resort, but you could be at the "what do I have to lose, so why not?" point by now. You may want to PM the poster(or anyone else who has had success) for more info if you need it & to see if it is a lasting fix or not.
Good luck! :fingers-crossed:

startswithPendswithOOH said:
Welp...that doesn't sound good. One last question(i think you already answered, but double checking)- so with power off, plugging the usb cable into a pc & holding vol up does nothing at all?
I guess if you're in "last resort mode" the oven may be the way to go, but I have not done it myself so I can't help much there. Here's a post from someone who had success using the oven... http://forum.xda-developers.com/showpost.php?p=68235296&postcount=7
I'd be nervous and would do it as the absolute last resort, but you could be at the "what do I have to lose, so why not?" point by now. You may want to PM the poster(or anyone else who has had success) for more info if you need it & to see if it is a lasting fix or not.
Good luck! :fingers-crossed:
Click to expand...
Click to collapse
I also ventured for the oven.and within 2 seconds.my board was gone...oven trick is just a sarcasm.don't go for it.
You can extra life of 30 minutes by giving it a Sunbath for some time.

My bad - misquoted a poster.

I kind of forgot about this thread whoops
Well I have news for you guys, I got a used g3 from eBay and wanted my apps from my old phone back and you know what I did?
I stuck it into the oven. I **** you not, after 375 for 5 minutes it started working again and I was able to get my apps and data to an SD card. Its still working but I took the battery out of it to use with the replacement. Can't believe it worked tbh

Hard Brick on LS991

Hi
The other day I was looking for cell ID info on my LG G4 that I have had for a long time in the "hidden menus". I accidentally clicked on the radio test and the screen froze up. I tried to get out of it, but noting would work, not even the power button. After a few minutes, I saw the power off sequence. When I went to turn if back on, it would not power on. I plugged it in, no charge. I tried to boot to recover, nothing. I have the service manual for the h815 variant which differs from mine. I do not have a boardview or anything.
I know trying to permanently fix it is a lost cause, it is old and it had other problems, such as the headphone jack not working even after I replaced it, and the read camera's autofocus being stuck after I replaced it with a cheap knockoff. However, I want to get it running long enough to get important things off of it. I was foolish and a few of my 2FAs are only on that device, and while I have gotten most of them switched to my alternate, I need to make sure to get the rest. I'm not sure which troubleshooting route to follow: Power? Crash/No Boot? No charge? I would follow each but some of the differences between the board I have and the service manual includes a few of the test points I need. Currently I have to attach wires to my multimeter leads to get small enough tips.
If anyone has anything that can help me get this running for a bit, let me know please.\
edit: biggest problem is I don't know how to tell from the schematic what pin is which on the board

Catt0s said:
Hi
The other day I was looking for cell ID info on my LG G4 that I have had for a long time in the "hidden menus". I accidentally clicked on the radio test and the screen froze up. I tried to get out of it, but noting would work, not even the power button. After a few minutes, I saw the power off sequence. When I went to turn if back on, it would not power on. I plugged it in, no charge. I tried to boot to recover, nothing. I have the service manual for the h815 variant which differs from mine. I do not have a boardview or anything.
I know trying to permanently fix it is a lost cause, it is old and it had other problems, such as the headphone jack not working even after I replaced it, and the read camera's autofocus being stuck after I replaced it with a cheap knockoff. However, I want to get it running long enough to get important things off of it. I was foolish and a few of my 2FAs are only on that device, and while I have gotten most of them switched to my alternate, I need to make sure to get the rest. I'm not sure which troubleshooting route to follow: Power? Crash/No Boot? No charge? I would follow each but some of the differences between the board I have and the service manual includes a few of the test points I need. Currently I have to attach wires to my multimeter leads to get small enough tips.
If anyone has anything that can help me get this running for a bit, let me know please.\
edit: biggest problem is I don't know how to tell from the schematic what pin is which on the board
Click to expand...
Click to collapse
Sounds like the ilapo but as you have modified the hardware it can be everything of course . anyways it wouldn't hurt to try some of the Bootloop fixes which you can find in my signature . Your best chance might be flashing the TWRP version for the ilapo and trying to load the recovery. Another option is of course to get into download mode and use salt to backup the user data partition.
Ilapo TWRP (when your device is unlocked only):
https://leech.binbash.rocks:8008/TWRP/ILAPO-O/
SALT (included in mAid / fwul): http://bit.do/FWULatXDA
Sent from my OnePlus 7T Pro using XDA Labs

S20 Ultra Bricked (G9880)

Hi guys, i come here searching for help, it was a normal day, i was out with the phone fully working, it was on my pocket, when i get home i see that it's off, tried to turn on and nothing... tried vol- and power to enter download mode and nothing, the screen is always black.
Connected it to my laptop to see if it shows up as a USB device, it sounds like it connected and in "Device Manager" it show as "QUSB_BULK_CID:0412_SN:BA92F870" but ODIN doesn't detect it, so i can't try to install a clean ROM.
I can't take it to samsung as this model is a HONG KONG one and i'm in Chile, they won't apply warranty and legally i had only 3 month in a external shop but i'm on my 5th month, so it's not use to try that way.
A few points about the phone:
Latest firmware: (INSTALLED NATURALLY, I GOT IT FROM SAMSUNG OFFICIALY)
Country/Carrier: Hong Kong
Date: 2020-10-26
Version: 10
PDA: G9880ZHU2BTJ6
CSC :G9880OZS2BTJ6
NEVER EVER tried to install a rom or something on the phone, i was happy with how it works and the battery i got from it.
Now i bought a S20 FE as a momentary replacement because i can't be without a phone for my work... i've read lots and lots of threads on XDA and other places but all of them are about the Note 4, so it's really out of date to try fix it that way, at least 6-8 years old posts.
Anyone here had a similar issue? is it fixable?
Hope someone can help, it really hurts loosing a phone that costs +USD1000
Thanks guys.

Gerstark said:
Hi guys, i come here searching for help, it was a normal day, i was out with the phone fully working, it was on my pocket, when i get home i see that it's off, tried to turn on and nothing... tried vol- and power to enter download mode and nothing, the screen is always black.
Connected it to my laptop to see if it shows up as a USB device, it sounds like it connected and in "Device Manager" it show as "QUSB_BULK_CID:0412_SN:BA92F870" but ODIN doesn't detect it, so i can't try to install a clean ROM.
I can't take it to samsung as this model is a HONG KONG one and i'm in Chile, they won't apply warranty and legally i had only 3 month in a external shop but i'm on my 5th month, so it's not use to try that way.
A few points about the phone:
Latest firmware: (INSTALLED NATURALLY, I GOT IT FROM SAMSUNG OFFICIALY)
Country/Carrier: Hong Kong
Version: 10
CSC :G9880OZS2BTJ6
NEVER EVER tried to install a rom or something on the phone, i was happy with how it works and the battery i got from it.
Now i bought a S20 FE as a momentary replacement because i can't be without a phone for my work... i've read lots and lots of threads on XDA and other places but all of them are about the Note 4, so it's really out of date to try fix it that way, at least 6-8 years old posts.
Anyone here had a similar issue? is it fixable?
Hope someone can help, it really hurts loosing a phone that costs +USD1000
Thanks guys.
Click to expand...
Click to collapse
Aorry to hear that.. did tou try vol up and power to go to recovery?

Gerstark said:
Hi guys, i come here searching for help, it was a normal day, i was out with the phone fully working, it was on my pocket, when i get home i see that it's off, tried to turn on and nothing... tried vol- and power to enter download mode and nothing, the screen is always black.
Connected it to my laptop to see if it shows up as a USB device, it sounds like it connected and in "Device Manager" it show as "QUSB_BULK_CID:0412_SN:BA92F870" but ODIN doesn't detect it, so i can't try to install a clean ROM.
I can't take it to samsung as this model is a HONG KONG one and i'm in Chile, they won't apply warranty and legally i had only 3 month in a external shop but i'm on my 5th month, so it's not use to try that way.
A few points about the phone:
Latest firmware: (INSTALLED NATURALLY, I GOT IT FROM SAMSUNG OFFICIALY)
Country/Carrier: Hong Kong
Date: 2020-10-26
Version: 10
PDA: G9880ZHU2BTJ6
CSC :G9880OZS2BTJ6
NEVER EVER tried to install a rom or something on the phone, i was happy with how it works and the battery i got from it.
Now i bought a S20 FE as a momentary replacement because i can't be without a phone for my work... i've read lots and lots of threads on XDA and other places but all of them are about the Note 4, so it's really out of date to try fix it that way, at least 6-8 years old posts.
Anyone here had a similar issue? is it fixable?
Hope someone can help, it really hurts loosing a phone that costs +USD1000
Thanks guys.
Click to expand...
Click to collapse
The device is powering on and off randomly on it's own, correct? This sounds like a hardware issue, you may have a defect somewhere in the power supply chain. If you have a reputable repair agency nearby, not necessarily Samsung, this would be my first step. Not sure why Odin isn't detecting the device. Here's an article which offers common solutions for this problem.
https://rootmygalaxy.net/fix-odin-not-detecting-samsung-android-phone/
Good luck!

myaslioglu said:
Aorry to hear that.. did tou try vol up and power to go to recovery?
Click to expand...
Click to collapse
Yes, but it doesn't work, screen alway stays on black, i know it's not fully dead because it sounds as a USB driver when connected to my laptop
varcor said:
The device is powering on and off randomly on it's own, correct? This sounds like a hardware issue, you may have a defect somewhere in the power supply chain. If you have a reputable repair agency nearby, not necessarily Samsung, this would be my first step. Not sure why Odin isn't detecting the device. Here's an article which offers common solutions for this problem.
https://rootmygalaxy.net/fix-odin-not-detecting-samsung-android-phone/
Good luck!
Click to expand...
Click to collapse
tomorrow i'll try to take it somewhere, thanks for the link, but i already tried all those tips

I take it you have a Qualcomm cpu? If so you need to install the Qualcomm usb driver, link https://gsmusbdrivers.com/download/android-qualcomm-usb-driver/ or a newer version if available. This should solve the problem in regard of pc connection, usb recognition and most of all reading the internal memory. Please use Google search for mor info and the correct procedure as i never used this myself. Good luck.

gee2012 said:
I take it you have a Qualcomm cpu? If so you need to install the Qualcomm usb driver, link https://gsmusbdrivers.com/download/android-qualcomm-usb-driver/ or a newer version if available. This should solve the problem in regard of pc connection, usb recognition and most of all reading the internal memory. Please use Google search for mor info and the correct procedure as i never used this myself. Good luck.
Click to expand...
Click to collapse
Anything you can find on google i already tried, installing the drivers didn't help either... thanks tho!

Oh hey, its you! We spoke on reddit a few days ago about this problem, sorry to see you haven't been able to fix it.
Have you tried all your USB ports? Or maybe another computer? Worst case scenario there's a solid chance Samsung will repair it either for free if you're lucky or for a price. Even if you bought it from another country there's a possibility the manufacturer's warrant is intact especially because it sounds like you didn't do anything to the phone at all that would've warranted the sudden failure.
Does ADB see it when it's plugged in? If you don't have ADB installed follow this: https://www.xda-developers.com/install-adb-windows-macos-linux, then once installed run "adb devices" from command prompt.

Help! Hard-bricked Galaxy S9

Hi,
I got my daughter a new phone and planned to send in her s9 as AT&T was offering $800 for trade in... She got her new phone set up, then, somehow, her S9 that's been going strong for years, hard bricked itself. I've been all over the internet trying to dig up a solution, but no luck yet....
**Symptoms**
No blinking LEDs
Power + Volume Up: Nothing
Power + Volume Down + Bixby: Nothing (Boot menu screen never comes up)
Plug into computer:
Hear windows USB connect sound
See device in device manager under "Other Devices":"qusb_bulk_cid:0402..."
Unplug from computer:
Hear windows USB disconnect sound
While plugged into comuter:
Power + Vol Down + Bixby: Usb Disconnect / Reconnect Sound, device disappears / reappears from Device Manager (no boot menu)
**What I've tried so far...
FixPpo for Android: Wasted $40. Does not fix hard-bricked phone. If you can't get to the screen you can't get the firmware image onto the phone.
ODIN 3: Does not see the phone in the ID:COM field. Iinstalled the Qualcomm HS-USB drivers and restarted w/ Driver unsigned mode. Phone shows up under Ports (COM & LPT) but ODIN still doesn't see it.
QPST: Can see the phone, but that's all I could seem to do with it.
QFIL: This started out promising, until I needed "Programmer Path" and "Content XML" files, which I can't seem to find for the galaxy S9 (Or perhaps there's a generic Qualcomm one I can't find)
If someone's out there, anywhere, that's been able to resolve this I'd really appreciate some additionl info / links to the right files for QFIL. Or am I SoL if the screen doesn't come up? I feel like we would have seen some symptoms earlier if the screen was starting to burn out vs. just never coming up again...
Thanks in advance,
Steve in Massachusetts, USA

Display dead or software dead

Thanks for the reply...
That's a good question.... I think it's just the software. The phone has been working fine for years, with no degradation or dead pixels, and it wasn't abused or dropped. I've had no luck qith QFIL... was going to attempt Octoplus next, but I don't want to drop $50 for a license if I'm still going to end up bricked. I think QFIL could work if I could get it into download mode, but with no screen that's proving difficult.

stevenlmas said:
Thanks for the reply...
That's a good question.... I think it's just the software. The phone has been working fine for years, with no degradation or dead pixels, and it wasn't abused or dropped. I've had no luck qith QFIL... was going to attempt Octoplus next, but I don't want to drop $50 for a license if I'm still going to end up bricked. I think QFIL could work if I could get it into download mode, but with no screen that's proving difficult.
Click to expand...
Click to collapse
Hey, you need download software for you model s9 if you want flash again

oli231 said:
Hey, you need download software for you model s9 if you want flash again
Click to expand...
Click to collapse
Thanks - I did download QFIL, Odin and QPST, but b/c I can't get PC to see it as a modem, Odin doesn't work. I can't get QFIL to work b/c I can't get into download mode. I just blew $50 on Octoplus, but am still waiting for my license key...
I've put $150 into a dead phone... I probably could have got a used one for that if I looked hard enough.

stevenlmas said:
Thanks - I did download QFIL, Odin and QPST, but b/c I can't get PC to see it as a modem, Odin doesn't work. I can't get QFIL to work b/c I can't get into download mode. I just blew $50 on Octoplus, but am still waiting for my license key...
I've put $150 into a dead phone... I probably could have got a used one for that if I looked hard enough.
Click to expand...
Click to collapse
For my eye motherboard is dead

My S9+ died similarly. Was watching a video and suddenly it crashed and stopped working. Came back to life 2 days later just to die again after an hour. Turns out it was old liquid damage from a month prior swim. Popped it open and cleaned it with isopropyl alcohol and it's working now. If you're feeling confident you can try to open it and see if it's liquid damage or anything that a simple fix such as an alcohol clean might fix. But most likely it's a hardware not a software problem. Good Luck.