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ClockworkMod (CWM) Recovery easy install for RK3066 and RK3188 -- TWRP/CWM Flash-Tool and root for RK3288

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Impossible to get recovery mode
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nunoit
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Forum Posts: 12
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2014/09/06
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2014/09/12 - 20:50
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hello all ok i have the same tablet arnovo 7k g3 stuck on boot screen. i have read the thread and have gotten most of the same results so far still not able to load any type of file. well not exactly in one mode i was able to put image on hard drive only thing no way to execute it and if i removed the usb cable then reinserted it the file on the drive was gone.

in my experimenting i found since i had to re solder the usb port back on the board that the device uses a 5 pin connector with this name configuration. 

micro_usb_pinout.jpg

most usb cables come with pin 4 not connected maybe programming cable is different

i tested voltage on pin 4 and found it to be 1.4 volts above ground. i read that some manufactures use it pinned to gnd to identify master slave. so maybe using this pin ground might be able to flash the vimimicro chipset. 

one question i have anyone with the child pad taken any pictures of the main board both sides to see if we all have the same board with the same problems. just a thought.

i downloaded a tool called SDPack Tool which a program called vortexflash supposed to work with vimicro chips will test post results and any files if any success.

also i found that there is a jtag pad on the board so that is also a way once a method is found. from past experience jataging will work to replace the firmware.

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nunoit
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2014/09/13 - 23:30
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 had a chance to play alittle today no luck . played with Zixoon_v78c_v1118 and vortexflash.exe  and some flashes they did not load. so any body else want to try i can post files. so for now back to the drawing board. going to look into jataging. btw jtag port is under the digitizer ribbon.

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nunoit
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2014/09/16 - 20:06
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i just read that the vimicro vc0882 chip is a cortex a8 cpu.  don't know true that is going to find out though.  

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nunoit
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2014/09/17 - 21:51
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if you fokes have the same board you will find programming pinout called sdi,sdo,sck,sda,rst,int,vdd, and gnd.

they should be for directly connecting to the flash chip through the cpu. trick is to what program and what file to use to restore the board to factory standard.


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Padillaz
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2014/09/30 - 10:29
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I noticed the little circular button about an inch from the reset button and played around with it a bit. I managed to get it in to safe mode with it. It also got it to show up as a storage device "VDc"? It still will not show up on any tools so I'm at a loss as to what to do now but thanks to all who have tried and have successfully got theirs in to recovery mode.Laugh 

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LOT75
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2014/10/19 - 18:42
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Find here: http://www.arctablet.com/blog/forum/archos-arnova-childpad/childpad-vimicro-an7dg3b/ the definitive solution for the custom firmware of the Vimicro CHILDPAD tablet (AN7DG3B) LaughLaughLaughLaughLaugh

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