How to save bricks if you can't get into fastboot

Kindle Fire brick repair process

was published on may 22, 212 by admin

phenomenon: because of testing software, the default heap size of the system (which has been rooted) was reduced, and as a result, the launcher could not run, so it was restarted as soon as it was booted into the desktop.

There are many brick-saving posts on the Internet, but I always can't get into fastboot mode with ordinary USB cable, and it doesn't work. Finally, it was solved by engineering line.

first, making the engineering line

(reposting) In fact, the engineering line of kindle fire is the ordinary micro usb data line with a little change. When the kindle is started, it will automatically detect whether the fourth corner of micro usb has +5v voltage, and if so, it will directly enter the recovery mode.

1. Cut the connector of micro usb and use a knife or something. Be careful not to get it.

2. After cutting, you can see that there are three lines on the front, the first one is red (positive electrode+), the second one is green (data), and the third one is black (negative electrode-). When turned upside down, the first one is empty and the second one is white (data).

3. Use a thin wire, one end of which is welded to the vacancy and the other end is welded to red (+). After completion, use a multimeter to test whether there is a short circuit and whether the welding is normal.

second, install the driver

you can use the driver included in Kindle Fire Utility .9.6. if you run install_drivers.bat

, the prompt language will not be supported under Win7. just change ×49 to ×84 in the drivers-dpinst.xml file.

under WinXP, you will be prompted that it is unsigned, and the installation failed. You don't need to install it first, and install it when you identify the equipment in the following steps

3. Install the Android SDK (with tools such as adb and fastboot)

4. wipe data

is turned off, and the PC is connected with an engineering cable, which will automatically start to enter fastboot mode.

unplug the engineering cable and replace it with a common MicroUSB cable. The device identification is Android adb interface.

ADB cannot be used in fastboot mode. Use C: \ program files \ Android \ Android-SDK \ tools \ Fastboot.exe command

Run fastboot -i ×1949 -w

Prompt:

Erasing' user data' ...

Okay [127.469s]

Erasing' cache' ...

Okay [29.73s].

finished. totaltime: 157.172s