Bricked device?

[TecKnight]

Unfortunately, attempting to install a 64 bit Windows on an X98 is known to corrupt the EFI BIOS and brick the tablet.

The only option you have is to get an external USB flasher and flash it from a PC.

Try searching the XDA developers thread and you will find more info.

http://forum.xda-developers.com/android/general/teclast-x98-air-3g-tablet-9-7-2048×1536-t2913035/

TTTTecKnight's Teclast Tutorials series

[Anonymous]

I ordered the external USB device for reflashing the bios chip. And as I saw, there’s no videos on how to fix them, so I’ve read how to do and stuff so I’m probably gonna post a video tutorial for “How to unbrick your Teclast device”.

Thanks for your answers, TecKnight. They’re appreciated.

[Kay pira]

Fredrik H : yes please do that I did the same, it well be G8 Thanks.

 

[Martynas]

Any news regarding unbrick, what parts wrwere used and etc?

[Fredrik Hedlund]

Im still waiting for the 2nd part I ordered.

I ordered these 2 for the unbrick:

http://www.ebay.com/itm/141502408551?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

and

http://www.ebay.com/itm/24-25-series-EEPROM-Flash-BIOS-USB-Programmer-CH341A-with-Software-driver-/381374935496?

 

I’ll keep you guys updated!

[Martynas]

I have resurected my bricked teclast x98 air II HG9M, make sure you use diod or voltage stabilizer from 3.3v to 1.8v on 8pin as our winbond chip operates on that voltage, some are lucky to restore bios with 3.3v voltage, but you need to do it fast, in my case 3.3v voltage just erased FW and I was unable to upload correctly it again, so used voltage stabilizer on 8pin wire between eeprom flasher and clip to chip, photos later 😉

[Fredrik Hedlund]

I didnt manage to resurrect my bricked device. I used the USB bios chip reprogrammer, it succeded, but I still cannot boot my device. If you have any ideas about this, please post!

[Martynas]

Fredrik you need to reduce voltage on 8 pin output from programmer as it output is 3.3v and your chip is made for 1.8v.

[Fredrik Hedlund]

Nvm my previous post. The tablet was just decharged. Plugged it into the charger for an hour and tried to start it and boom, it started as before.

[Martynas]

Nice to hear that, seems bricked bios leaking energy 🙂

[jeremiah]

I am having the same problem with my teclast air III! can anyone help me? I know I screwed up by trying to directly load windows onto it, but how can I unbrick it? Does anyone have a set of instructions or a video please?

 

if someone helps me fix this i will pay them!

[Andre]

I had the very same problem. I’m flashing with flashrom through Raspberry Pi, instead of buying a CH341A. But I can’t get it to detect the BIOS. I can see two problems:

1. I haven’t desoldered the battery wire. I read you had to do this, is it true?
2. Also, the Raspberry Pi works at 3.3V like the CH341A. Is this a problem? (Have I burned my BIOS by flashing at 3.3V? :S)

Or is it another thing? Please help, I really need my tablet back… 🙁

 

[Andre]

How exactly did you manage to reduce the voltage to 1.8V?

[Andre]

Martynas wrote:

I have resurected my bricked teclast x98 air II HG9M, make sure you use diod or voltage stabilizer from 3.3v to 1.8v on 8pin as our winbond chip operates on that voltage, some are lucky to restore bios with 3.3v voltage, but you need to do it fast, in my case 3.3v voltage just erased FW and I was unable to upload correctly it again, so used voltage stabilizer on 8pin wire between eeprom flasher and clip to chip, photos later

Fredrik Hedlund wrote:

I didnt manage to resurrect my bricked device. I used the USB bios chip reprogrammer, it succeded, but I still cannot boot my device. If you have any ideas about this, please post!

How exactly did you manage to reduce the voltage to 1.8V? I need help with this; I’m even afraid I already fried the chip by trying once because I can’t get it to detect (though this could be because of the clip). Thanks a lot!!

[Andre]

Help, anyone? How did you manage to reduce the voltage to 1.8V?

[Author]

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