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[HOWTO] Revive a bricked P500 on fastboot mode (the SHORT way)

The usual DISCLAIMER: Use at your own risk!
Fastboot mode usually comes up if something went wrong when trying to flash a recovery image, for example when flashing AmonRa recovery or ClockWorkMod. It happened to me several times so I tried to learn to revive it without reflashing the original firmware. Note: This tutorial works only if recovery is the only one broken. (If the ROM itself is broken, then that's a subject for another tut.) In this case, the most logical thing to do is just reflash the recovery image. So how do you do it in fastboot mode? Here's how:
Symptom
You tried flashing a custom recovery like ClockWorkMod or Thunderg, or you flashed an incorrect ROM, and when you rebooted, it showed this screen:
Code:
fastboot mode started
udc_start()
and the phone stays there. When you plugin the phone to your computer's USB, it is detected and the screen has this display:
Code:
fastboot mode started
udc.start()
-- suspend --
-- reset --
-- portchange --
-- reset --
-- portchange --
You will need
1) Your PC and your USB cable for the phone
2) USB drivers for your phone (use B2C from LG).
3) Android SDK (download from here)
4) Java, required to run the SDK (but right now I am not sure if this is required to run fastboot!)
5) ClockWorkMod or AmonRa Recovery.
Here's what to do
1) Assuming phone is turned on in fastboot mode, plug it in to the USB of your PC. You will know that it is detected if you see the the lines "suspend", "reset" and whatnot on the phone's screen.
2) Extract the recovery image from the zipfile downloaded from step#5 above (e.g. LGp500-recovery-v12.img). Place the image file in the same folder where fastboot.exe is (usually in the tools\ folder in the SDK). For your convenience, rename the img file as recovery.img
3) Fire up your command prompt and cd to the directory where fastboot.exe is located. Then type the following command:
Code:
fastboot erase recovery
Once you get the confirmation that it was successful, type this:
Code:
fastboot flash recovery recovery.img
Once you get the success confirmation, reboot the phone, or you can also type (optional):
Code:
fastboot reboot
The phone will reboot itself, and with any luck you should be able to go back to your same old Android bootscreen. Note that no settings were modified here, so this is extremely useful for those who do not want a clean slate after a fastboot nightmare.
Also, note that if this is successful, you can now boot to recovery with the usual button-combos, thus enabling you to flash ROMs and other recovery zips.
Note: On some SDK versions, fastboot may not be included. For your convenience, I have attached the fastboot binary I got from my downloaded SDK. I have also attached AdbWinApi.dll which some user reported is missing in the SDK. Place the DLL in the same folder where fastboot.exe is located.
Questions, just drop me a line here

thanks dude, its very usefull

Nice tutorial for newbies like me, thanks...
Sent from my LG-P500 using XDA Premium App

We already have a tut like this.

@arvinoids
Good tutorial, but you forgot to say that LG USB drivers are needed and that fastboot.exe must be downloaded before (it's no more included in android SDK)
thanks man

d3s3rt_eagle said:
@arvinoids
Good tutorial, but you forgot to say that LG USB drivers are needed and that fastboot.exe must be downloaded before (it's no more included in android SDK)
thanks man
Click to expand...
Click to collapse
You are right! I should add that here. Also, I got the latest SDK to verify and found fastboot.exe under the "tools" folder. Can tell me which SDK version you downloaded?

Usefull, thank you
Sent from my LG-P500 using XDA Premium App

Kudos to arvinoids.
This will be of great help in times of need.
Sent from my LG-P500 using Tapatalk

arvinoids said:
You are right! I should add that here. Also, I got the latest SDK to verify and found fastboot.exe under the "tools" folder. Can tell me which SDK version you downloaded?
Click to expand...
Click to collapse
I have SDK r10 and cannot found fastboot under tools
So i had to download it from htc's website.

d3s3rt_eagle said:
I have SDK r10 and cannot found fastboot under tools
So i had to download it from htc's website.
Click to expand...
Click to collapse
Wow, that's strange. I have r11 and it is included there. For your convenience, I have attached the fastboot.exe from r11 on the first post. Thanks for trying this out.

i have a question... if we don't see the fastboot line on our breaked phone and we see just stuck at LG Logo and the Recovery is broken too, what we can do?! how we can enter in fastboot mode in this situation?

hey
I run the CMD
executed cd command but the next command
"fastboot erase recovery"
gives the following error ( see the image)
Please help

@arvinoids:- mate your work acted as a GOD to me for now. I solved my above issue by just googling the AdbWinApi.dll, downloading it and putting it in the same directory as the fastboot.exe
Thanks mate

DJoptimus-One said:
@arvinoids:- mate your work acted as a GOD to me for now. I solved my above issue by just googling the AdbWinApi.dll, downloading it and putting it in the same directory as the fastboot.exe
Thanks mate
Click to expand...
Click to collapse
Did rom manager messed up your phone?
Sent from my LG-P500 using Tapatalk

lekhwani said:
Did rom manager messed up your phone?
Sent from my LG-P500 using Tapatalk
Click to expand...
Click to collapse
Yes. For the first time.

DJoptimus-One said:
Yes. For the first time.
Click to expand...
Click to collapse
How is your phone now?
Sent from my LG-P500 using Tapatalk

lekhwani said:
How is your phone now?
Sent from my LG-P500 using Tapatalk
Click to expand...
Click to collapse
Revived now

DJoptimus-One said:
Revived now
Click to expand...
Click to collapse
Good to hear that. I think this is your 2nd or 3rd day and you came across worst o1 modding scenario and overcame it. Kudos to you.
Sent from my LG-P500 using Tapatalk

AdbWinApi.dll is included in platform-tools
DJoptimus-One said:
@arvinoids:- mate your work acted as a GOD to me for now. I solved my above issue by just googling the AdbWinApi.dll, downloading it and putting it in the same directory as the fastboot.exe
Thanks mate
Click to expand...
Click to collapse
Hi. Sorry I was away for the weekend and just got back. Thanks for reporting this. I just did a search on my desktop and found out that AdbWinApi.dll is included in the platform-tools package. I will add the instructions to download the package from the SDK. I'm glad you were able to revive your phone. Thanks again!

pymebrahimi said:
i have a question... if we don't see the fastboot line on our breaked phone and we see just stuck at LG Logo and the Recovery is broken too, what we can do?! how we can enter in fastboot mode in this situation?
Click to expand...
Click to collapse
I'm afraid your issue may not be a subject for this tutorial. Fastboot mode is activated when the phone's recovery image is broken. May I know how you are sure that the recovery is actually broken?

Rom help and recovery

I'm extremely new to this and this website, sort of. So if any of this is wrong impression already sorry. A few weeks ago I rooted my myTouch_4G_Slide, using s-off. I'm pretty sure that went OK as my phone is still currently rootly rooted. Next I tried using a custom rom, i am not exactly sure what I did wrong but, I cannot boot into recovery and when i go into Hboot I get multiple "no image" popping up. I can't factory reset and when i try to boot into recovery my phone gets stuck at the mt4gs screen and i have to take out the battery. Is there anyway to fix this, easily hopefully.
Sent from my myTouch_4G_Slide using XDA App

You said your phone is s-off and "rootly rooted". I assume you meant "permanently rooted"? Did you use the right version of superuser (2.3.6.3 or above) and clockwork recovery image (4.0.0.9)? You can ignore the "no image" message, I get them all the time and I can still boot into recovery no problem.

I have the right superhero version but i don't think I have the right clockwork. How could I fix it, without having to boot into recovery.
Sent from my myTouch_4G_Slide using XDA App

imjames said:
I'm extremely new to this and this website, sort of. So if any of this is wrong impression already sorry. A few weeks ago I rooted my myTouch_4G_Slide, using s-off. I'm pretty sure that went OK as my phone is still currently rootly rooted. Next I tried using a custom rom, i am not exactly sure what I did wrong but, I cannot boot into recovery and when i go into Hboot I get multiple "no image" popping up. I can't factory reset and when i try to boot into recovery my phone gets stuck at the mt4gs screen and i have to take out the battery. Is there anyway to fix this, easily hopefully.
Sent from my myTouch_4G_Slide using XDA App
Click to expand...
Click to collapse
Sounds like you need to reflash your recovery. Since you can get into fastboot still, this is an easy fix.
Just download the recovery image from here -
http://android.modaco.com/topic/343...e-mytouch-4g-slide-unofficial-modaco-edition/
once downloaded, enter hboot and select fastboot. Once your phone says "fastboot usb" on it enter the following command into fastboot -
Fastboot flash recovery c:/android/tools/recovery.img
The "c:/android/tools/recovery" portion of that command will be variable based on where the downloaded recovery image is contained on your computer.
Id say that has a pretty good chance of fixing your prollem =). Keep me posted
Sent from my myTouch_4G_Slide using xda premium

do i have to have adb to do it, because thats learning in progress

imjames said:
do i have to have adb to do it, because thats learning in progress
Click to expand...
Click to collapse
um, yeah. Fastboot is like ADB, but a different tool included in the SDK. Do you have the SDK? It's relatively simple, let me just break it down to maximize simplicity.
1) If you don't have the SDK, download it (in zip format) here. If you do have the SDK,
2) for simplicity's sake, create a Directory on your computer (the hard drive root) entitled "Android" (so that it's c:\Android).
3) If you didn't previously have the SDK, once it is is downloaded, extract the files.
4) assuming you run windows, navigate to the SDK, there's a subdirectory called "tools". Move that folder into the Android folder you created.
5) Now. take that recovery.img that you downloaded... (if you haven't done so yet, look to the link I provided in my previous post) move IT to the Android folder as well
6) open a command prompt and change the directory to the tools subdirectory of the Android folder (type cd c:android\tools), You'll now see a command prompt beginning with C:\Android\tools
7) make sure your phone is connected to your computer and in fastboot mode (select "fastboot" from the Hboot screen, it'll then say "fastboot usb" on the screen). I"m assuming your drivers are already properly installed since you were able to root your phone.
8) type in the following command into the commmand prompt - "fastboot flash recovery c:\android\recovery.img
That should do it =)

Sorry this took awhile, I am having trouble with the command prompt I can't get it to change
Sent from my myTouch_4G_Slide using XDA App

imjames said:
Sorry this took awhile, I am having trouble with the command prompt I can't get it to change
Sent from my myTouch_4G_Slide using XDA App
Click to expand...
Click to collapse
Because:
AndroidAutobot said:
... (type cd/c:android/tools) ...
Click to expand...
Click to collapse
Should be:
cd c:\android\tools
if you installed the SDK to a folder in your C: drive called android. That's what I did too because it makes life easier.
The rest of AndroidAutobots post is what you need to do, this one command was just typed wrong.

Blue6IX said:
Because:
Should be:
cd c:\android\tools
if you installed the SDK to a folder in your C: drive called android. That's what I did too because it makes life easier.
The rest of AndroidAutobots post is what you need to do, this one command was just typed wrong.
Click to expand...
Click to collapse
Oops lol. I cant believe i did that ha ha. Thanks for spotting that =)
I've corrected all the command lines in that particular post. Should be able to follow it step by step without any trouble now.
Sent from my HTC Doubleshot using xda premium

Error: can not load recovery-Tiamat-R4c-100611-1150-cwm

So I have my Xoom unlocked and I am trying to flash the recovery in order to root. I have the recovery in the platform tools folder along with fastboot and all that, and I'm able to get the Xoom into fastboot from adb, but I can't get the recovery to flash. I'm typing the name correct. And I'm putting in 'fastboot flash recovery recovery-Tiamat-R4c-100611-1150-cwm.img' without the quotes. Honestly I'm a little bit stumped at this point.

I have had the same issue for the past few days I have also tried the steps here no luck.... http://forum.xda-developers.com/showthread.php?t=1249798

supenova3000 said:
I have had the same issue for the past few days I have also tried the steps here no luck.... http://forum.xda-developers.com/showthread.php?t=1249798
Click to expand...
Click to collapse
I used the same guide. It just makes no sense that I can control the Xoom and unlock it, but I can't flash the darn recovery.

williamthegoat said:
I used the same guide. It just makes no sense that I can control the Xoom and unlock it, but I can't flash the darn recovery.
Click to expand...
Click to collapse
I tried moving the files from the tools folder to platform tools still no luck.. all of this for the I C S flash I'm going to keep working on a solution I will let you know if I have any luck!

So I have the android sdk in c:\ , and in the sdk folder I have everything, and in the platform tools I have my fastboot and recovery. I then use cmd to get into adb, then I put the xoom in fastboot. From there I try to flash the recovery, which always fails. I must be doing something wrong here.

Try downloading the IMG again. Or try out the rogue recovery. I actually like rogue better.
Sent from my MB860 using xda premium

I finally got it. In command I needed to direct it to the platform tools folder and then it flashed just fine. I am now rooted. Now to learn about flashing ICS
Thanks for the responses and help guys

Think you have to be stock to flash to ICS, at least that was the word yesterday.
I gave up trying to root just as I found out about the ICS update.

williamthegoat said:
I finally got it. In command I needed to direct it to the platform tools folder and then it flashed just fine. I am now rooted. Now to learn about flashing ICS
Thanks for the responses and help guys
Click to expand...
Click to collapse
Two simple errors:
1) not opening the command window from the folder where you have fastboot and the image files you're trying to flash; and
2) not realizing that you have hidden file extensions in Windows, and typing ...recovery.img.img

williamthegoat said:
So I have my Xoom unlocked and I am trying to flash the recovery in order to root. I have the recovery in the platform tools folder along with fastboot and all that, and I'm able to get the Xoom into fastboot from adb, but I can't get the recovery to flash. I'm typing the name correct. And I'm putting in 'fastboot flash recovery recovery-Tiamat-R4c-100611-1150-cwm.img' without the quotes. Honestly I'm a little bit stumped at this point.
Click to expand...
Click to collapse
I assume that you've set up a path in environment variables to run adb and fastboot from ay directory... and are running the flash command from a folder other than where your .IMG file is located. In order for fastboot to find the file you're trying to flash, you actually have to run your flash command from the folder your file is located...
So, cd\...\platform-tools and then flash

The simplest way I perform all of my operations for this:
I leave everything installed into it's default locations. I download tiamat's CWM image and place it into the platform-tools folder.
For Windows 7, I use Windows PowerShell.
For example: Open Start Menu > Type "power" to search, "Windows PowerShell" should show up. (For me, its default at the top - so I press enter to open it)
Once opened: I type this configuration EXACTLY as is: (Keys in <>)
Code:
cd C:\Pr <TAB><TAB> An <TAB> An <TAB> Pl <TAB><TAB> <ENTER>
This above brings me directly to:
C:\Program Files (x86)\Android\Android-sdk\Platform-tools\
Of course, this will be different depending upon your computer setup. I've nailed this routine to get to the path the quickest.
to use FASTBOOT (XOOM already in fastboot mode):
Code:
./fastboot flash recovery rec<TAB><ENTER>
This auto completes the filename as ./recovery-tiamat-r4c-xxxx.img
Of course, depending on how many files/folders you have, you may have to hit <TAB> multiple times. I have to do it 3 or 4 times to select the recovery image I want.
Auto-complete is a nice thing. "./" is added to command from the working directory.

williamthegoat said:
I finally got it. In command I needed to direct it to the platform tools folder and then it flashed just fine. I am now rooted. Now to learn about flashing ICS
Thanks for the responses and help guys[/QUOTE
Worked for me too!!! Thanks!!!
Click to expand...
Click to collapse

[Q] Noob Root Walkthru

I am new to the ASUS family of tablets, and j just can't figure out how to root. I have rooted many tablets and installed custom roms before but the i cannot follow the how tos listed here. For one fastboot doesnt work on my computer. It opens and closes immediately. What i would like is a detailed step by step guide with a trouble shooting guide. I mean now i reading about downgrading, blob files and a few other things i never dealt with on my galaxy. Someone help......would love to root this thing. Email me if u want [email protected]

You need to run fastboot from the DOS Prompt
start run - cmd
then type fastboot command.
I take it you have unlocked your bootloader?

Check this thread, it has videos about rooting and whatnot, hope it helps:
http://forum.xda-developers.com/showthread.php?t=1663244

Northern-Loop said:
You need to run fastboot from the DOS Prompt
start run - cmd
then type fastboot command.
I take it you have unlocked your bootloader?
Click to expand...
Click to collapse
Yes, Bootloader is unlocked. Ok, so I tried the flashboot command, so now what? I typed the command from the walkthru "fastboot -i 0x0B05 flash recovery recovery.img " but get an errorcannot load recovery.img. So what am I missing. I have the recovery image on my desktop.....

Put the recovery image in the same folder as your fastboot application and it should work.

xAshxMoneyx said:
Put the recovery image in the same folder as your fastboot application and it should work.
Click to expand...
Click to collapse
....what fastboot folder? I installed the ADK per the instructions, I downloaded the root and recovery image. I looked in the system for a fastboot folder and do not see it. Plus when I try to type in the fastboot command now, it says it is not a recognized command. I am sure this is something simple, but I am just not getting it. Is there a more detailed step by step somewhere that will actually walk you thru the steps without assuming you know what they are talking about? I can root my phone, my galaxy tab all day long and install and change ROMS, but this one has me upside down.

When you installed android SDK and ran SDK manager to install the tools, it should create a "platform tools" folder. In that folder you should see "fastboot.exe." Put the recovery image into the same platform tools folder.
Make sure when you run the command that you are in the command prompt, and that you have navigated to the same platform tools folder. It should then recognize the fastboot command and flash your recovery.

xAshxMoneyx said:
When you installed android SDK and ran SDK manager to install the tools, it should create a "platform tools" folder. In that folder you should see "fastboot.exe." Put the recovery image into the same platform tools folder.
Make sure when you run the command that you are in the command prompt, and that you have navigated to the same platform tools folder. It should then recognize the fastboot command and flash your recovery.
Click to expand...
Click to collapse
Found the folder and it did have the platform tools in it but Apparently I have forgotten how to navigate in CMD, so I moved the folder to the current location CMD was at. I typed in the command fromt the walkthrough and I get "adbwinapi.dll" is not installed. Not sure if this is progress or not.....so now what.

That file should be in your platform tools folder as well. I think it's a driver issue. Is your tablet showing up in device manager? Does it have a yellow triangle? I'm not really an expert unfortunately, hopefully someone with more knowledge can jump in.

xAshxMoneyx said:
That file should be in your platform tools folder as well. I think it's a driver issue. Is your tablet showing up in device manager? Does it have a yellow triangle? I'm not really an expert unfortunately, hopefully someone with more knowledge can jump in.
Click to expand...
Click to collapse
So I think I am going to delete everything and start from scratch. This shouldn't be this difficult. Here we go......

tccc143 said:
So I think I am going to delete everything and start from scratch. This shouldn't be this difficult. Here we go......
Click to expand...
Click to collapse
Ok, so reinstalled everything.....did a quick refresher on CMD directions and had it rooted with CWM in 10 minutes. I have been working in Android so long without the use of a PC that I forgot how to use the PC. Thanks for the help....now we wait for some nice roms.

Sweet, glad you got it, I've done this stuff a few times but I always have to refresh myself and take it slow on each different device.

tccc143 said:
Found the folder and it did have the platform tools in it but Apparently I have forgotten how to navigate in CMD, so I moved the folder to the current location CMD was at. I typed in the command fromt the walkthrough and I get "adbwinapi.dll" is not installed. Not sure if this is progress or not.....so now what.
Click to expand...
Click to collapse
You should not move the folder. This can cause all kinds of problems. in the cmd prompt just type
cd \folder\folder\etc.
The cd means change directory and you start off with a backslash to set the initial path to the root of your drive. if folder names include spaces then wrap the path with quotes, cd "\folder one\folder two\etc". the prompt should change from C:\windows or whatever to what you typed in.
if you've installed on a drive other than C: then first change to that drive by typing the drive letter followed by a colon, ie D:
Good old DOS will never die.
Sent from my SCH-I510 using XDA

My Rooted N5, & Android 4.4.2

Hey guys, I have a rooted N5 with CF Auto Root. I have been trying to do a update to 4.4.2. however, every time I download it and go to install, I get a error upon reboot, The update doesn't install. I'm still rather new with rooting phones. I was hoping someone could give me some insight on how to install this? I had a friend tell me its possible to manually install the update if I could locate the files?
Thanks!

Hi,
Take a look here: [INFO] Nexus 5 OTA Help-Desk, read closely

viking37 said:
Hi,
Take a look here: [INFO] Nexus 5 OTA Help-Desk, read closely
Click to expand...
Click to collapse
Ahh, excellent, thank you! However I'm a bit confused on what ADB Sideload is and how to use it. XD

ItsStormy said:
Ahh, excellent, thank you! However I'm a bit confused on what ADB Sideload is and how to use it. XD
Click to expand...
Click to collapse
Install the android-sdk platform- tools, look here for how to https://www.google.nl/url?sa=t&rct=...OWoMssTikMpokJ6TtwEND5A&bvm=bv.61190604,d.bGQ.
Then put the rom/OTA you want in the platform-tools folder, reboot in recovery and select adb sideload and then in cmd type `adb sideload namerom.zip` to flash the zip.

Ooops, got it sorted, thanks guys!

ItsStormy said:
Hi again, so I've gone over the tutorials. However when I attempt to go through the steps within http://forum.xda-developers.com/showthread.php?t=2523217 - I keep getting the error 'adb' is not recognized as an internal or external command, operable program or batch file. What am I doing wrong?
Thanks!
Click to expand...
Click to collapse
You have not created a path, look here http://www.redmondpie.com/how-to-set-up-android-adb-and-fastboot-on-windows-tutorial/ item 5, 6 and 7.

Okay, so apparently thats only a issue if my phone isnt rooted judging by the first tutorial, it states I should follow section B.
1) Download the OTA.zip and copy to your phone.
2) Boot into recovery.
3) Flash the OTA just like you would a ROM.
4) Reboot.
However, When I boot into Recovery Mode, I get a error stating No Command.

ItsStormy said:
Okay, so apparently thats only a issue if my phone isnt rooted judging by the first tutorial, it states I should follow section B.
1) Download the OTA.zip and copy to your phone.
2) Boot into recovery.
3) Flash the OTA just like you would a ROM.
4) Reboot.
However, When I boot into Recovery Mode, I get a error stating No Command.
Click to expand...
Click to collapse
Do you have a custom recovery? choose B. If on stock recovery boot in a custom recovery by placing the custom recovery.img in fastboot folder and type in cmd `fastboot boot namerecovery.img`, let it load and flash the OTA in recovery and boot up.

gee2012 said:
Do you have a custom recovery? choose B. If on stock recovery boot in a custom recovery by placing the custom recovery.img in fastboot folder and type in cmd `fastboot boot namerecovery.img`, let it load and flash the OTA in recovery and boot up.
Click to expand...
Click to collapse
Eh. I don't believe so, or I'm not entirely sure, I'm sorry.

ItsStormy said:
Eh. I don't believe so, or I'm not entirely sure, I'm sorry.
Click to expand...
Click to collapse
If you have stock recovery there should stand 3e recovery on top, if so reboot into bootloader and do what i wrote in the prior post. Or sideload the OTA with adb in stock recovery.

Thanks for the help gee2012
I leave you in good hands :good:

I've followed the steps for system variables.
C:\Program Files (x86)\Android\android-sdk;C:\Android-adb
However, I'm still receiving adb is not recognized from the terminal.
Any idea what I might be doing wrong? I'm sorry about noobing this thread up.

ItsStormy said:
I've followed the steps for system variables.
C:\Program Files (x86)\Android\android-sdk;C:\Android-adb
However, I'm still receiving adb is not recognized from the terminal.
Any idea what I might be doing wrong? I'm sorry about noobing this thread up.
Click to expand...
Click to collapse
Dumb question, but is adb.exe in the android-adb folder?

jd1639 said:
Dumb question, but is adb.exe in the android-adb folder?
Click to expand...
Click to collapse
Now that you mention it, apparently not. I did however find this. And it is either in that location. I went into AVD Manager, but I don't see anywhere where I can install ''Android SDK Platform-tools"
The adb tool has moved to platform-tools/
If you don't see this directory in your SDK,
launch the SDK and AVD Manager (execute the android tool)
and install "Android SDK Platform-tools"
Please also update your PATH environment variable to
include the platform-tools/ directory, so you can
execute adb from any location.

ItsStormy said:
I've followed the steps for system variables.
C:\Program Files (x86)\Android\android-sdk;C:\Android-adb
However, I'm still receiving adb is not recognized from the terminal.
Any idea what I might be doing wrong? I'm sorry about noobing this thread up.
Click to expand...
Click to collapse
Best is to install the sdk straight to the C drive, so C:\android-sdk and not in a folder. The path vaiables to add would be \android-sdk\platform-tools.