Develop Bugs

[Q] How do you tell if phone is in download mode?

So, I had to replace the screen on my phone because it was cracked. But not after putting it all back together, the phone just boots loops. I am trying to follow the guide about unbricking your phone but I am unsure about getting into download mode. I hold down both volume buttons and plug in the usb into the computer, but noting happens except the phone just keeps boot looping. How do you tell if phone is in download mode? What does the screen look like?

If you get into download mode, you can't miss it. It is pretty obvious. To get your phone into download mode, shut off your phone (Hold power button for 12 second), wait 2-3 sec, press both volume button and then insert usb cable.

Hmm. Seems like my problem is something else. I can't get in into download mode. I cant even get the phone ti turn on if it isn't plugged in.

BumRush said:
Hmm. Seems like my problem is something else. I can't get in into download mode. I cant even get the phone ti turn on if it isn't plugged in.
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Could your battery be dead? Getting to download screen is a bit tricky as far as the timing is concerned.

USB should be already inserted, otherwise phone will just boot when you plug the cable in.
So usb pluged in, next turn off the phone via power button, now hold both volume buttons + power, should work.

Tim4 said:
USB should be already inserted, otherwise phone will just boot when you plug the cable in.
So usb pluged in, next turn off the phone via power button, now hold both volume buttons + power, should work.
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^this has been my experience as well. Turn phone off. Insert USB. Wait for charging screen to flash on and disappear. Then press and hold vol+ vol- power until Download Mode screen flashes on, then release buttons.

First of all when in download mode you'll see a box displayed saying "download mode" it's hard to miss even you try to.
Here's how I did it. Instead of trying to push both vol + and- , press the middle part of the volume rocker. And press power button at the same time. USB cable can be plugged in advance or can be inserted later on. Only advantage of plugging the USB later is it gives you a proper grip and reassurances you've pressed the button combination correctly. Note that the phone will look for a USB presence before booting to download mode..hope this helps
Sent from my LG-E975 using xda app-developers app

[Q] LG Optimus G Sprint is stuck on android recovery system, screen is cracked?

My LG Optimus G is stuck on the Android System Recovery screen. I can move up and down with the volume bar but I can select anything because you need to use the soft menu button and my screen is cracked there. Is there anyway to get around this? I've tried holding power and volume down to reset it but it just restarts and goes back to the recovery screen.

angelottia said:
My LG Optimus G is stuck on the Android System Recovery screen. I can move up and down with the volume bar but I can select anything because you need to use the soft menu button and my screen is cracked there. Is there anyway to get around this? I've tried holding power and volume down to reset it but it just restarts and goes back to the recovery screen.
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Click to collapse
The power button should be the select. Press up or down on the volume to navigate and press power when you are where you want it to be.
Is the recovery stock or CWM? The power button should work either way for the select. Hope this helps.
also if you are just trying to restart, try holding down only power for about 20-30 seconds, it should do a hard shut down, then when you press power to turn on again it should go to the system.

dopy25 said:
The power button should be the select. Press up or down on the volume to navigate and press power when you are where you want it to be.
Is the recovery stock or CWM? The power button should work either way for the select. Hope this helps.
also if you are just trying to restart, try holding down only power for about 20-30 seconds, it should do a hard shut down, then when you press power to turn on again it should go to the system.
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I'm not sure if it's stock, it says Android Recovery System e3. It says to hit enter to choose an option but hitting the power button wouldn't select anything. I held down the power down and it shut off and isn't turning back on.

my lg optimus g turned off and now it wont come on or hold a charge
Well where do I start, I love this phone and I have not had a single issue with it until yesterday, took my phone off the charger in the am walked out the door , started my car went to make a phone call and my phone was off , tried to turn it on and to no avail, so i took the battery out of the phone (mind you this was quite an experience taking the back cover off) took care of that unhooked the battery let it sit for 5 minutes and it came back on like a charm , well as the day progressed my battery eventually died , so im thinking no biggie right? wrong tried to turn my phone on and nothing at all , just a solid red light which eventually cuts off but thats only when you put it on a charger and does nothing no blinking lights no power nothing. So ive been online following a bunch of different steps and the only thing i could do was put the phone into download mode when connected to a cpu but the cpu doesnt seem to see the device nor does it have power , im trying to fix this myself if possible, im really not trying to pay for a repalcement phone or wait 14 days to get another one so ill try as hard as i can here first and see if i can get some help.. PLEASE!!!! HELP!!!

angelottia said:
I'm not sure if it's stock, it says Android Recovery System e3. It says to hit enter to choose an option but hitting the power button wouldn't select anything. I held down the power down and it shut off and isn't turning back on.
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Did the battery die? What happens when it is plugged in and you hold down the power? (to attempt to turn back on)

LG G Pad 8.3 V500, possibly bricked itself - what can I try to fix it?

I have a V500 that won't boot, and doesn't appear to charge either. Here's what it will do:
1) When plugged into a mains charger, flash up the LG logo briefly. I don't need to press the power button for this to happen.
2) When plugged into a mains charger with both volume keys held down, boot into download mode.
If I plug it into a USB port it won't power on. It will briefly be detected by Windows but not as any useful device. I cannot get it into download mode when it's connected to a USB port, and if I do (2) then unplug it powers off.
My powered USB hub has an indicator light. With the tablet connected, whenever I press the power button this light comes on for a second or so. If I connect the USB cable whilst holding down both volume keys this light also comes on, but the tablet does not go to download mode.
I have already changed the main flex cable in case this was the problem.
Does anyone have any suggestions?

Try it with one of the USB plugs at the back of the computer.
I've got devices I can transfer files on and off via the hub built into my monitor but if I want to do anything lower level I have to use a USB port on the computer.

I have finally been able to sort this.
I'm not sure precisely what was wrong. I changed the internal USB flex cable and this made no difference.
Next I bought a switchable "data/charging" USB cable that was very useful in diagnosing circumstances where it would enter download mode.
After much messing around I found I could plug the device into a powered USB hub that wasn't connected to a laptop and enable download mode, then connecting the hub to the laptop it would stay in download mode and allowed me to reflash it back to stock so I knew the software was at least okay.
It still wouldn't do anything other than show the initial bootloader logo though, and this only when plugging in a cable. Pressing the power button did nothing.
Since it was still open, I disconnected the battery. Tried powering on with the cable connected, nothing. Left the cable connected, connected the battery - bing! We have life.
It's now bootlooping but it's playing animations and making sounds, so I'm hopeful I can factory reset the device. The power button works at least

madscout said:
Make sure your device is fully charged and turned off.
Simultaneously press and hold the power and volume down buttons.
When the LG logo shows up, release the power button only.
Now press and hold the power and volume up button while keeping your hold on the volume down button.
When the factory reset screen appears, release your hold on all buttons.
Press the power button to continue.
Press the power button again to confirm if you’re sure you wish to continue with the reset.
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Click to collapse
Great success! Device is working

Clarification, please
If you have a V500, explain how you can hold VOLUME button simultaneously in UP and DOWN position. It's just one rocker button, but you keep referring to it as 2 separate volume buttons. This goes for madscout quoted solution as well.

Mirek Goldberg said:
If you have a V500, explain how you can hold VOLUME button simultaneously in UP and DOWN position. It's just one rocker button, but you keep referring to it as 2 separate volume buttons. This goes for madscout quoted solution as well.
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Using two fingers. It's one rocker but you can hold both buttons down at the same time.

bradavon said:
Using two fingers. It's one rocker but you can hold both buttons down at the same time.
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I think we're not on the same page as far as my query goes. Forget the POWER button - it is not an issue. Because VOLUME button is a rocker it is impossible to hold down VOLUME UP and VOLUME DOWN positions simultaneously as madscout solution advises: "Now press and hold the power and volume up button while keeping your hold on the volume down button". Such trick is impossible even with 3 fingers, because the Volume rocker can be pressed and held either in Up or Down position. Madscout wants us to keep it pressed in both positions simultaneously, the crucial phrase being "while keeping your hold". Now, do you get my drift? And explain to me what madscout meant? Thanks!

My V500s allow the whole rocker to be pressed in at the same time. It's not a true rocker.
If you open the device up, you will see two independent buttons.

hordarian said:
My V500s allow the whole rocker to be pressed in at the same time. It's not a true rocker.
If you open the device up, you will see two independent buttons.
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REALLY? That's a surprise. Thanx, bro. Sneaky LG put in fake rocker button.. Meaning, that madscout's solution requires 3 fingers - 1 for Power and 2 for Volume.
Or 1 finger only for Volume if it's pressed exactly in the middle. Crazy world.

Any help? Similar situation at my Gpad - usually after initial animation is powered off. If I make factory reset i can start device, i can adjust some setings, but in a few minutes it is switching off. V50020F and no root is there.

G Pad bricked. Any help would be appreciated!

Basically, the device wont turn on no matter what I do, no matter what key combinations I use. If I plug it into a power outlet, the LG logo comes up, then the tablet shuts down, then the LG logo comes up, rinse and repeat.
If I plug it into a PC, I get the sound of it connecting and disconnecting over and over, but nothing comes up on the display.
I've never had a bricked device that I couldn't unbrick by going into adb or download-mode but I can't even get into download mode. I'm stuck and ran out of ideas.
Any help would be greatly appreciated! Thanks!
EDIT: I got it to show the charging logo. Basically just left it plugged in doing the logo-loop for about 15 minutes until the battery indicator showed up. Very strange. Hopefully once it's charged everything will be fine.

Have you pressed the volume up key + pressed the power button multiple times over and over, I can get mine into download mode only if I use that method.
When I corrupted my tablet, first it would hang on the LG logo screen and never boot into anything, once, then I got the issue of it boot looping only into TWRP only even after installing ROM's, then flashed TWRP in TWRP, and wala, fastboot boot loop only, for the life of me I could not get it to go into download mode, I had almost given up, but alas the last attempt to randomly smash buttons unveiled that holding volume up + clicking power over and over rather quickly rendered it to download mode...
If your getting the LG logo screen its likely that you can recover it.
As for the connecting/disconnecting, its likely that the device your connecting it to cant provide the power being pulled by the device, I have to use a powered USB hub for my Alienware 17 (R2) early 2015 laptop, as it cant handle the power draw of almost any devices, I have had issues even with self powered USB portable hard drives, so I really can feel your pain.

Bricked (?) Lenovo Zuk Z2

Hey, new user here.
I recently came across my old dead Z2. Is there any way to revive it?
If I hold the power button for half a second, it will vibrate, show the ZUK splash logo and then turn off.
If I keep holding the power button, it'll loop (vibrate --> show logo for a few seconds --> turn off).
If I plug it into my PC through USB-C, it'll do reboot over and over, similarly.
Most un-brick methods I've read involve using the notification LED to do something, but my phone doesn't show anything on the notification LED so I've tried a few times doing stuff using power button + volume-up but that doesn't work.
Power + volume down gets me into the bootloader I think. It says 'FASTBOOTMODE' in red, SECURE BOOT enabled and DEVICE STATE - locked.

Fluxiey said:
Hey, new user here.
I recently came across my old dead Z2. Is there any way to revive it?
If I hold the power button for half a second, it will vibrate, show the ZUK splash logo and then turn off.
If I keep holding the power button, it'll loop (vibrate --> show logo for a few seconds --> turn off).
If I plug it into my PC through USB-C, it'll do reboot over and over, similarly.
Most un-brick methods I've read involve using the notification LED to do something, but my phone doesn't show anything on the notification LED so I've tried a few times doing stuff using power button + volume-up but that doesn't work.
Power + volume down gets me into the bootloader I think. It says 'FASTBOOTMODE' in red, SECURE BOOT enabled and DEVICE STATE - locked.
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Click to collapse
Phone not dead.

https://youtu.be/nY1leEQF1fY
I gaurantee this will definitely unbrick your phone!:good::fingers-crossed: