November 30, 2017 at 9:11 am #75543vizoukParticipant
- Posts: 1
Hello, recently after having a tablet with black screen for a few months and then suddenly not even giving a signal i bought the CH341a programmer and flashed the bios, the first file emily sent me was a C109S bios but all over the board i can see C109D on board stick on button cable etc….
So i tried with both C109D she was giving to people with close serial numbers to mine and C109S, the tablet kept giving no signal.
At the moment i don’t know how to test the power button but the voltage over the bios chip is not stable at 1.8V does that indicate a problem with AXP288C voltage regulator?
It is between 1.2V and 1.8V changing very fast .
Can anyone with a table like this check if voltage is stable on bios chip?
My battery fully charges to 4.2+ V .December 19, 2017 at 1:19 pm #75995Morimchi MutohParticipant
- Posts: 2
Hi, I’m in very similar situation. My Hi10 Pro board is numbering as “6CS2R3 <span style=”line-height: 1.5;”>C109D” and serial number is “HQ64G42170301355″. </span>
<span style=”line-height: 1.5;”>With USB-C type charger, bios chip’s voltage is moving between 0v to 1.3v immediately. Now i’m charging battery with external charger directly and will check it again. However, which bios shall I flash on bios chip??? If anyone have, please send me a message.</span>January 4, 2018 at 1:07 pm #76432Morimchi MutohParticipant
- Posts: 2
Hi, my problem was solved by flashing correct BIOS again.
At first, battery of my tablet was empty (0V! measured by digital multi meter), so I charged it with external battery charger module.
Next, I asked emily, who is support of Chuwi, to send BIOS file for my Hi10 Pro with serial number on official forum.
Then, flash it on my tablet with external flash writer, according to the tutorial.
At last, I could see Chuwi logo on display again after reboot by long press power button.
In this time, my Android part has broken, so I had to recover it with OS images. (Notice: You have to choose correct image with your serial number)
vizouk, if you want not to throw out your tablet, please try above. Thanks.November 26, 2019 at 9:41 pm #182129attisParticipant
- Posts: 6
CPU errorJanuary 23, 2020 at 1:59 pm #182553paoloParticipant
- Posts: 1
I have the same problem . Please, Can you gently post the Bios link? (my tablet has the serial no. near yours)
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