[How To] Fix Stock Kindle Fire 2 Bootloop

[hexd]

A few months ago I tried to root/ gapps a KF2 for a friend, and after a freak OTA update the horrible thing kept getting stuck in a bootloop.

Basically if you powered it on it would get stuck on the Kindle pulsing logo until it restarted itself from scratch and did it all over again. Then on the few times it would get to the standard lock screen it would freeze up there and restart itself anyway.

Every now and then it would boot in and work fine though.

What I eventually did to get it working:

1.) Get a factory cable (they don't cost too much off ebay).

2.) Using fastboot mode clear the data and cache partition:

fastboot -i 0x1949 erase cache
fastboot -i 0x1949 erase userdata

20 seconds later the device worked perfectly and hasn't bootlooped since.

It might also be possible to do this by a.) installing TWRP and erasing the cache/ data from there, or b.) booting into the bootloader from a rooted system. I don't want to test this though because at this point I just want to make this awful thing work properly in stock.

I hope this helps someone else in the same situation. I do remember reading a similar problem on XDA a few months ago when it started giving trouble.

 

[Karetus]

A few months ago I tried to root/ gapps a KF2 for a friend, and after a freak OTA update the horrible thing kept getting stuck in a bootloop.

Basically if you powered it on it would get stuck on the Kindle pulsing logo until it restarted itself from scratch and did it all over again. Then on the few times it would get to the standard lock screen it would freeze up there and restart itself anyway.

Every now and then it would boot in and work fine though.

What I eventually did to get it working:

1.) Get a factory cable (they don't cost too much off ebay).

2.) Using fastboot mode clear the data and cache partition:

fastboot -i 0x1949 erase cache
fastboot -i 0x1949 erase userdata

20 seconds later the device worked perfectly and hasn't bootlooped since.

It might also be possible to do this by a.) installing TWRP and erasing the cache/ data from there, or b.) booting into the bootloader from a rooted system. I don't want to test this though because at this point I just want to make this awful thing work properly in stock.

I hope this helps someone else in the same situation. I do remember reading a similar problem on XDA a few months ago when it started giving trouble.

Where do i enter this in when I'm in fastboot?

 

[hexd]

Where do i enter this in when I'm in fastboot?

You need to use the fastboot application. You can get it either via the Android Development Kit (just google for it) or just use it from any other source (I know the FlashTool for Sony phones has it along with ADB). Once it is on your PC, open a command prompt window to that folder and run it from there.

Just remember you need the Kindle to be in FB Mode (the screen has a picture of a red and green stoplight on it) and you need fastboot drivers installed for the device (this is a bit tricky for Win8, no problem for Windows 7 though).

 

[Karetus]

You need to use the fastboot application. You can get it either via the Android Development Kit (just google for it) or just use it from any other source (I know the FlashTool for Sony phones has it along with ADB). Once it is on your PC, open a command prompt window to that folder and run it from there.

Just remember you need the Kindle to be in FB Mode (the screen has a picture of a red and green stoplight on it) and you need fastboot drivers installed for the device (this is a bit tricky for Win8, no problem for Windows 7 though).

I'm at a screen with a blue arrow a and yellow text that says "fastboot mode"

 

[hexd]

I'm at a screen with a blue arrow a and yellow text that says "fastboot mode"

Please make sure that you have a Kindle Fire 2 (or at least something in the second generation Fire range). It might help if you take a picture of the device in fastboot mode and post it here.

Also did you boot the kindle into fastboot mode using a factory cable, or using a command from Android itself (it would have involved adb shell).

 

[Karetus]

Please make sure that you have a Kindle Fire 2 (or at least something in the second generation Fire range). It might help if you take a picture of the device in fastboot mode and post it here.

Also did you boot the kindle into fastboot mode using a factory cable, or using a command from Android itself (it would have involved adb shell).

From the computer. KFF Aide. I'm still stuck I have been looking for hours.

 

[JORDANZ1998]

A few months ago I tried to root/ gapps a KF2 for a friend, and after a freak OTA update the horrible thing kept getting stuck in a bootloop.

Basically if you powered it on it would get stuck on the Kindle pulsing logo until it restarted itself from scratch and did it all over again. Then on the few times it would get to the standard lock screen it would freeze up there and restart itself anyway.

Every now and then it would boot in and work fine though.

What I eventually did to get it working:

1.) Get a factory cable (they don't cost too much off ebay).

2.) Using fastboot mode clear the data and cache partition:

fastboot -i 0x1949 erase cache
fastboot -i 0x1949 erase userdata

20 seconds later the device worked perfectly and hasn't bootlooped since.

It might also be possible to do this by a.) installing TWRP and erasing the cache/ data from there, or b.) booting into the bootloader from a rooted system. I don't want to test this though because at this point I just want to make this awful thing work properly in stock.

I hope this helps someone else in the same situation. I do remember reading a similar problem on XDA a few months ago when it started giving trouble.

my kindle fire hd 7 7.3.1 just went into a boot loop. it is recognized by my computer the drivers work it says device cant startup. adb wont work. how do i get it into fast-boot without a factory cable

 

[hexd]

my kindle fire hd 7 7.3.1 just went into a boot loop. it is recognized by my computer the drivers work it says device cant startup. adb wont work. how do i get it into fast-boot without a factory cable

Trying to do any work on a Kindle without a cable is a total pain. If you own the device just pay the few dollars to get one and make your life easier.

If you cannot get into ADB with full root, or a 3rd party recovery that was already installed you will need the cable to fix things.