[Aino]

As I posted in other thread, flashed a firmware with wrong loader inside and this fully bricked my t760, there seems to be 2 kinds of brick for t760:

A "semibrick" that occurs when the tablet still can be powered on but loops forever in the booting image (the screen shows the image, goes dark and shows the image again) and is still recognized by the pc via usb, this can be solved just flashing again with an original firmware and clicking on "restore" button in the flash tool.

A full brick, when the tablet doesn't power on and is not recognized by the pc via usb. In this case we need to force the tablet to be recognized by the pc but now as a "MSC device" (rk maskrom device) that is a special recovery mode of the rk2918 chip. This is achieved by stopping the communication between the rk29 chip and the nand chip.

Procedure to recover the t760 from a total brick (disclaimer: THIS IS A DELICATE PROCEDURE, IT CAN DAMAGE YOUR T760 AND I WILL NOT BE RESPONSIBLE IF THAT OCCURS, DO IT AT YOUR OWN RISK):

-Open the tablet and remove the plastic that covers the main chips:
 IMG_0050_lr.jpg (194.05K)
Number of downloads: 441

-There are two nand chips (green line) we are gonna work with the first of them (red line):
 01.jpg (396.61K)
Number of downloads: 475

-The pins 29 and 30 must be shorted, you can do that with the head of a needle:
 02.jpg (581.99K)
Number of downloads: 429
 03.jpg (260.11K)
Number of downloads: 395

Now the steps:

1. Start the flashing tool in the pc and load a firmware img file.
2. Connect the usb cable to the pc
3. Short the 29 and 30 pins as stated above and while shorting connect the usb cable to the t760
4. Wait until the flashing tool shows "Found One Maskrom Device" and inmediately stop shorting the pins.
5. Clic on Restore button to start flashing the firmware to the t760
6. Wait until the flashing firmware ends and you will see an error message, don't worry, close it.
7. Unplug the usb cable from t760 and press the power button until the tablet starts. Let the firware complete the installation.

Here is the flashing tool in english language

 T760FlashTool.zip (470.35K)
Number of downloads: 343
T760FlashTool: http://www.mediafire...k6h7fwa8489xm6q

This post has been edited by Aino: 17 March 2012 - 04:58 PM
Reason for edit: added external link for flashing tool

[mrsburnout]

Nice. I highlighted your disclaimer and pinned the topic.

Thank you, Aino.

[Miss Dragon]

Now to whoever bricked your T760 and use this method, make sure you have this kind of skill and knowing what you're doing. It'll also avoid your warranty if you opened up. We--SlateDroid do NOT take any responsible.

[Aino]

Great, thanks mrsburnout

In my case, I had avoided the warranty few days before the brick by opening the thing just to see what was inside

[BABACHAN]

I got my tablet for two weeks now. Today I powered it up and it never passes the boot image. Teclast.com in red color -> tpad -> black screen and back to teclast.com again. And this happens over and over. I have official firmware 2.00. Is it semibricked? And how can I solve this? Reset does not work. It only powers the unit off. It says here flash again with orginal firmware. Where can I download it and where can I find instructions for flashing?

Thanks BABACHAN

[Aino]

Yes, that are the symthoms of a semibrick, something went corrupt.

here is the official 2.0 firmware
ftp://d:d@121.10.241...-V2.00-68AC.rar

[BABACHAN]

Aino, on 23 July 2011 - 01:20 AM, said:

Yes, that are the symthoms of a semibrick, something went corrupt.

here is the official 2.0 firmware
ftp://d:d@121.10.241...-V2.00-68AC.rar

Hi Aino,

Thanks for your reply.

Are flashing instructions the same as the first post skipping step 3, 4 and 5?
Can I immediately flash the latest firmware? Or is it wise to first flash with 2.00 and then with 2.03?

BABACHAN

[BABACHAN]

If I open the t760.img file in T760-V2.00-68AC\T760 V2.00\固件程序 in the flash tool it reports:
FW ver: 0.2.03
Loader Ver: 1.65
Support chip: RK29

I was expecting FW ver: 0.2.00

Is this correct?

But the worse part is that the flash tool does not recognize the tablet. Any ideas?

This post has been edited by BABACHAN: 23 July 2011 - 06:55 AM

[BABACHAN]

Problem solved!! My tablet is working again.

I did following to restore firmware:

1. Power off tablet
2. Hold volume + button while connecting tablet to pc with USB cable
3. PC reports new hardware found. Install drivers. Use driver located in T760-V2.00-68AC\T760 V2.00\驱动程序\. For some reason an error is reported but everything works.
4. Start flashtool
5. Select image file T760-V2.00-68AC\T760 V2.00\固件程序\t760.img
6. Press restore button
7. After a while tool reports succesfull flash and tablet is rebooted automatically.
8. Remove USB cable
9. Tablet will reinstall

This post has been edited by BABACHAN: 23 July 2011 - 04:06 PM

[BABACHAN]

What is the difference between "Restore" and "Upgrade" in flashtool?

[Aino]

Sorry babachan, forgot that I didn't posted the flashing steps for semibrick your steps are all right (just to avoid some errors you may rename the chinese named directories with english names)

About the fw ver in upgrade tool showing 2.03 I didn't noted before, tried 2.0, 2.03 and 2.04 and all shows 2.03 in that field, strange.

The difference between restore and upgrade is that the restore option formats the nand and write the space allocation for each partiton (teclast calls it IDB) and the upgrade option just overwrite the partition images in the current assigned partition space.

This post has been edited by Aino: 24 July 2011 - 03:09 AM

[BABACHAN]

Aino, on 24 July 2011 - 03:08 AM, said:

Sorry babachan, forgot that I didn't posted the flashing steps for semibrick your steps are all right (just to avoid some errors you may rename the chinese named directories with english names)

About the fw ver in upgrade tool showing 2.03 I didn't noted before, tried 2.0, 2.03 and 2.04 and all shows 2.03 in that field, strange.

The difference between restore and upgrade is that the restore option formats the nand and write the space allocation for each partiton (teclast calls it IDB) and the upgrade option just overwrite the partition images in the current assigned partition space.

Thanks for the info. I upgraded my tablet to 2.03. The ftp://121.10.241.8:2...ies/T760series/ location contains two 2.03 rar files. "T760 V2.03-41BB.rar" and "T760-V2.03-41BB.rar". The only difference in the filename is a "-". I took the T760-V2.03-41BB.rar. Do you know what the difference is?

I noticed a couple of differences between 2.00 and 2.03:
1. Lock screen changed from sliding a tab to a circle (2.00) to sliding a smaller circle to the edge of a bigger circle (2.03)
2. Changed keyboard to Android. But had to do that 5 times. Every time I used the keyboard in a different app it showed the Chinese one first.
3. Wifi is much faster in 2.03. Didn't measure it, it is more a feeling.

Did you experience the same?

[Miss Dragon]

Mine came with 2.02(guess it's 2.03?) don't know what's 2.0's lock screen looks like.

[Aino]

yes the 2.03 changed the locking screen, and has a bug that sometimes the selected keyboard backs to the chinese one. Your market is working correctly? mine sometimes had myapps dissapeared.

[BABACHAN]

Market is not working. Myapps is away empty.

[Miss Dragon]

Aino, on 26 July 2011 - 01:42 AM, said:

yes the 2.03 changed the locking screen, and has a bug that sometimes the selected keyboard backs to the chinese one. Your market is working correctly? mine sometimes had myapps dissapeared.

you mean the myapps icon? or the content from my apps? I haven't notice anything.

That's weird, I'm sure I downloaded netflix app last night and works very well, now, I just checked myapps, there is no content. Of course the Chinese switch keybard was touched by accent.

[BABACHAN]

rowwor, on 26 July 2011 - 09:55 AM, said:

you mean the myapps icon? or the content from my apps? I haven't notice anything.

That's weird, I'm sure I downloaded netflix app last night and works very well, now, I just checked myapps, there is no content. Of course the Chinese switch keybard was touched by accent.

Every app I downloaded using the market is working fine. But they are not displayed in my apps tab in market. It says "No items downloaded".

[Miss Dragon]

BABACHAN, on 26 July 2011 - 10:54 AM, said:

Every app I downloaded using the market is working fine. But they are not displayed in my apps tab in market. It says "No items downloaded".

Yep, I just downloaded another app and noticed that. maybe it'll only display the one you purchased? It didn't happen on my 2.2 tablet.

[vmajor]

This fixes the market on 2.03 http://www.slatedroi...03/page__st__20

V.

[pabc]

I've had a semi-brick so followed this procedure - albeit on Linux using XP in virtual box and it got as far as rebooting and displays;

Recovery system 1.3.37
Formatting Data:.....

then just hangs.

I used the latest firmware I could find which was 2.08b from this forum. Any suggestions?

P

Edit: forget that - i tried to power it off and that caused (or it was coincident) moving onto the next step - it's now rebooted again. Perhaps some notes on the time this takes would avoid noob anxieties a little!
Also, I should note that I kept getting drivers not suitable until I realised I was holding the sound decrease button!

This post has been edited by pabc: 12 September 2011 - 04:50 PM