Unbricking a Hi12…(don't try dual boot yet) :S

Unbricking a Hi12…(don't try dual boot yet) :S

TechTablets Forums Chuwi Forums Chuwi Hi12 Forum Unbricking a Hi12…(don't try dual boot yet) :S

This topic contains 8 replies, has 9 voices, and was last updated by  Bill Christiansen 3 years, 3 months ago.

Viewing 9 posts - 1 through 9 (of 9 total)
  • Author
    Posts
  • #33489

    Nick
    Participant
    • Posts: 27

    I may have got a little overzealous with the Dual boot files that have just been released (been waiting ages for this) and tried to flash the new BIOS. Everything boots and flashes as expected but I got an error towards the end and the screen went blank…it doesn’t come back on anymore now.

    Any ideas on if I can rescue from this? Hopefully we will get a working dual boot but for now – it’s probably wise to wait for a guide from Chuwi I have learned!

    #33493

    spzjulien supercowz
    Participant
    • Posts: 172

    same for me process fail at. 80%
    bios is not good for all it seem

    flashed original single os bios with hardware flasher, seem not want too boot too …

    #33532

    TWICE
    Participant
    • Posts: 58

    indeed. troublesome bios

    #33562

    Chris G
    Keymaster
    • Posts: 2644

    Whoa, close, so close. I was about to flash mine. Good thing I read this, sorry about the bricks. I’ve done it countless times now. Okay so Chuwi is correct, it can’t be flash, some hardware changes I guess is the problem. You’ll need to find the original Win 10 model bios and flash it with a USB programmer to recover the bricked Hi12.

    This guide will help, it’s essentially the same, just use the Cube H12 bios file

    EPROM in the CHuwi Hi12 is a 1.8v Winbond 25Q64V, so select WINBOND W25Q64 in CH341A, but be careful the USB flashers are for 3.3v chips use a logic level converter.

    http://techtablets.com/forum/topic/dual-os-version-announced/page/2/#post-27702

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    #34008

    emily
    Participant
    • Posts: 134

    Hello,

    Chuwi Hi12 has two version for single OS and Dualboot.

     

    If you are single OS (Windows Only), please download official files from Chuwi Official Forum:

    http://forum.chuwi.com/thread-167-1-1.html ( for firmware and driver)

    http://forum.chuwi.com/thread-277-1-1.html (for Bios X64 and Camera Driver for cannot recording)

     

    If you are dualboot with windows10 and android 5.1 , please download official files from Chuwi Official Forum:

    http://forum.chuwi.com/thread-1160-1-1.html

     

     

    #38798

    GBAM
    Participant
    • Posts: 2

    HI all;

    is there any method to turn a single boot chuwi h12 (I only have win 10)  into a dual boot one?

    does flashing a dual boot firmware do the job? Thanks.

    #38802

    Richard Russell
    Participant
    • Posts: 84

    HI all; is there any method to turn a single boot chuwi h12 (I only have win 10) into a dual boot one? does flashing a dual boot firmware do the job? Thanks.

    No, the closest thing is installing phoenix OS, but WiFi doesn’t work

    #41107

    Robert A
    Participant
    • Posts: 12

    I’m also in the same boat with a bricked Hi12

    I ordered a programmer and a sop8 clip, I was too impatient for the 1.8v adapter to come and figured hearing of other people’s success, I thought I’d try without it.

    So, everything went smoothly. It detected the chip just fine with the right model number everything. Flashed it with the battery wires desoldered. Flash verified to be the same as the bin file.

    Touch the battery wires back (without soldering, and they measured 6.3v), try to power on, and nothing.

    Retried with the older dual boot firmware, same thing. Bios chip reads and verifies great.

    I can’t figure it out. Surely it wouldn’t verify correctly or even be subsequently readable if there was a problem after flashing.

     

    Any ideas?

    #41115

    Bill Christiansen
    Participant
    • Posts: 187

    That 6.3v is a strange voltage for battery. On my dual boot version the batteries are in parallel so 3.7v flat or 4.2v charged. When it was over discharged while I was waiting for my tools to flash bios the battery got down to 3.3v and needed a good charge to boot even after reprogramming chip.

    The chip is definitely 1.8v and although it may verify when programmed at 3.3v it may be damaged and not work at normal frequency.

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