Android Tablets Forum banner
1 - 5 of 5 Posts

·
Super Moderator
Joined
·
1,154 Posts
The instructions given in this thread should work, but still as always, you use them at your own risk!

If there is a hardware problem then the tablet probably is bricked for good, but otherwise it's not really bricked at all (if you just have a correct firmware for your device).

----------------------------

If you can enter to adfu mode skip this paragraph. In order to to start the device in ADFU (Actions Device Firmware Upgrade) mode just start the device keeping the Vol+ and Power buttons down (sometimes when the buttons aren't defined correctly one have keep Home and Power buttons down instead). If you have only one button (POWER), see the third post for instructions how to enter ADFU/Recovery. If device doesn't go to ADFU mode but you can enter the recovery mode, you could try if a custom recovery (for example these portable versions) works. If it does, then Pad Product tool (run as admin!) might be able to switch the mode itself from UDISK to ADFU (then the DOWN button is green!). If there isn't any UDISKs then, using terminal, wipe the (boot/misc and) recovery partition (or just delete the *.img files) and reboot (into recovery, if boot/misc is not touched). This usually will "force" the device into adfu mode as nothing else works.

Before opening the tablet make sure that you have tried everything else first. Like tested different firmwares (meant for that tablet!) and different Pad Product Tool versions. The newest tool is usually best, but 1.02.04 is also good especially for older firmwares and winxp. And when changing tool to another version reboot your PC. It helps sometimes. Also try different USB ports (usb3 ports can be troublesome I've heard) and cables too. And then try try again...

----------------------------

0_14208c_ebdb3c00_L.jpg


Okay, everything tried and nothing helped. Tablet is "dead" or flashing just fails. It's time to open the device. (Be extra careful when doing it. It's quite easy to break the screen ribbon cable.)

Opening Ainol Crystal and Other Chinese Tablets (video by our fuser-invent)

----------------------------
 

·
Super Moderator
Joined
·
1,154 Posts
So, the tablet is now open, USB cable connected and PAD Product Tool is running (using admin rights).

Now, there is several pins that will force the tablet into ADFU mode. Any major booting error will do it, but there is also some more or less official ways to do it.

----------------------------

First option

At least in Ainol's tablets there is usually an area marked as ADFU on the board. Sometimes the text is missing but marking is the same. Connect those tin dots and start the tablet by pressing POWER and tablet enters into ADFU mode.

Some success stories
http://www.slatedroid.com/topic/52722-ainol-actions-7029-roms/page-14#entry788490
http://www.slatedroid.com/topic/66522-help-for-unbrick-ainol-crystal-ii-quad-core/page-2#entry1224242

0_142148_d7d85856_L.jpg

Ainol Crystal 2 ATM7029

0_142149_d6e815fb_L.jpg

Ainol Venus ATM7029/ATM7025

0_14214c_3dbaef8a_L.jpg

Ainol Spark 2 ATM7039

0_142405_762c39a6_L.jpg

Sometimes the ADFU spots can look totally different. This is some ATM 7029 TV Box.

----------------------------

Second option

Connect nand flash's pin number 17 (NAND ALE) to ground, to pin number 23 for example.
See the pins marked with green color in next option's picture.
Do not use the pins in the middle marked with red! No need and the flash might even burn!
Same in Chinese " 第12、 13、 36、 37脚(红色)为电源管理管脚'千万不能短路,以免烧毁芯片。"

0_14208d_356dcb52_L.jpg

ATM7029

0_14208e_52dfa846_L.jpg

ATM7029B

Confirmed working http://4pda.ru/forum/index.php?s=&showtopic=633760&view=findpost&p=38179641

----------------------------

Third option

Some other pins that are likely to work are marked with blue in the picture below.
The pins known to work are circled. I have used pins 43-44 my self.
Do not use the pins in the middle marked with red! No need and the flash might even burn!
Same in Chinese " 第12、 13、 36、 37脚(红色)为电源管理管脚'千万不能短路,以免烧毁芯片。"
0_142201_b3e36074_L.jpg


Some references
Pins 29-32 and 41-44 http://www.s1mp3.org/en/docs_deadrec.php#short
Pins 43-44 and 7-8 http://www.slatedroid.com/topic/41478-how-to-unbrick-your-amlogic-aml8726-mx-series-tablet-v20/
Pins 7-8 or 8-9 with some more info http://www.freaktab.com/showthread.php?1943-Unbrick-or-fix-NAND-on-the-MK808
(also here, used with ATM7013 http://forum.xda-developers.com/showthread.php?t=2537189)
Success using 7-8 http://www.slatedroid.com/topic/82161-aoson-m723-recovery-mode/?p=1156977

----------------------------

Fourth option

Not really an option needed, but removing the battery should work too.

----------------------------
 

·
Super Moderator
Joined
·
1,154 Posts
Starting the tablet in ADFU and recovery mode

----------------------------

Tablet has three buttons (POWER / VOL + / VOL- key) or more

ADFU:
Start tablet by keeping the VOL + (volume up) and the POWER buttons down.

Recovery:
Start tablet by keeping the VOL- (volume down) and the POWER buttons down.
After entering the recovery, use VOL + and VOL- to move and select by using POWER

----------------------------

Tablet has only one button (POWER)

ADFU:
Start tablet by keeping the POWER button down for 4 seconds, release it, and then immediately press it shortly three times in a row.

Recovery:
Start tablet by keeping the POWER button down for 4 seconds, release it, and then immediately press it shortly one time only.
After entering the recovery, use POWER to move and select by keeping POWER down 3 seconds or more.

----------------------------

To power off connect the usb cable (or charger) and keep power button down until the screen turns off.
Ten seconds should be enough.
Or if there is a reset button/hole, you can also use it to restart the tablet.
(usually such holes do the factory reset, so losing data is possible. IDK.)

单键模式(按3次ON/OFF键),此时对应操作方式如下:
进入ADFU的操作:
Reset后,按住ON/OFF 4秒,松开ON/OFF后,立即连续短按3次ON/OFF (power
键),则可进ADFU。也可在关机状态下,按ON/OFF 4秒上电,松开ON/OFF后,立即连
续短按3次ON/OFF (power键),进入ADFU。
进Recovery的操作:
Reset后,按住ON/OFF 4秒,松开ON/OFF后,立即短按1次ON/OFF (power键),
则可进Recovery。也可在关机状态下,按ON/OFF 4秒上电,松开ON/OFF后,立即短按1
次ON/OFF (power键),进入Recovery。
进入recovery后,通过短按ON/OFF键向下循环移动高亮选项,长按ON/OFF键(>=3
秒)用于选中当前高亮的选项。

Google translation:
Single Key Mode (press 3 ON / OFF button), then the corresponding mode of operation is as follows:
Enter ADFU operations:
After Reset, press and hold the ON / OFF 4 seconds to release the ON / OFF, press three times in a row immediately ON / OFF (power
Key), you can enter ADFU. After also be turned off, press ON / OFF power-four seconds, release the ON / OFF, even immediately
Continued short press three times ON / OFF (power button), enter ADFU.
Recovery into action:
After Reset, press and hold the ON / OFF 4 seconds to release the ON / OFF, immediately press 1 ON / OFF (power button),
You can enter Recovery. After also be turned off, press ON / OFF power-four seconds, release the ON / OFF, immediately press 1
Times ON / OFF (power button), enter Recovery.
After entering the recovery, press ON / OFF button down to move the highlighted option by a short cycle, long press ON / OFF button (> = 3
Seconds) for the currently highlighted option is selected.
----------------------------
 
1 - 5 of 5 Posts
Top