Bricked trying BIOS update

[Anonymous]

hello lupo, congratulation for unbrick you tablet, I try to unbrick my chuwi h10, but test clip does not detect chip, I follow your advises but I can not detect chip, I have program software ( 1.29) the status is connected,  too I have thought that test clip does not work, I do not know that I do bad… Armokie video looks that the tablet is charging while test clip detect chip? I have windows xp, ¿program software (1.29) work in windows xp? Put a clear photo how you has inserted adapter 1.8v in ch341a please

 

 

[Lupo]

Hi Javier,

unfortunately the adapter is in my office, but I have connected it exactly as it’s shown in the PDF manual.

Be careful with the chip pins, be sure that the clip contacts well with them, also double check the USB extension cable, in my case actually I have changed it and some time after that everything start working, but I’m not sure that the problem was in the cable … most important is to be sure that the red wire of the clip is on the right pin of the chip, and to be sure that the clip is contacting well with the chip pins.

[hyperboarean]

I’d recommend using EZP_XPro or DreamPro3/2 flasher:

Native 1.8V support, setting drivers in Win 10 is a *****, but once you get it going, you’ll be ready to flash just about anything.

 

http://www.aliexpress.com/item/EZP-XPro-Programmer-USB-motherboard-routing-LCD-BIOS-SPI-FLASH-IBM-24-25-Emulator-Writer-TL866/32538014346.html

Some info:

https://plus.google.com/+IanMORRISON/posts/5EuA7nFU9JA

 

Manufacturer web site:

http://www.dream-e.com/Pshow.asp?Pid=45

[Robert A]

So… I’m having a weird issue. Chip identifies in CH341a 1.29 WITHOUT the 1.8v adapter. Attaching the adapter, it cannot identify the chip. Same 1.8v adapter as everyone has pictured here, in the correct orientation…

 

Wondering if I should just give it a whirl and attempt to flash without the 1.8v adapter…

[Bill Christiansen]

Robert A wrote:

So… I’m having a weird issue. Chip identifies in CH341a 1.29 WITHOUT the 1.8v adapter. Attaching the adapter, it cannot identify the chip. Same 1.8v adapter as everyone has pictured here, in the correct orientation… Wondering if I should just give it a whirl and attempt to flash without the 1.8v adapter…

I wouldn’t recommend not using the adapter, even connecting to detect may have already inserted 3.3 v onto 1.8v components. Double check the silk screening on the PCBs that the pin numbers match as there maybe different ones around.

[Richard Russell]

Robert A wrote:

So… I’m having a weird issue. Chip identifies in CH341a 1.29 WITHOUT the 1.8v adapter. Attaching the adapter, it cannot identify the chip. Same 1.8v adapter as everyone has pictured here, in the correct orientation… Wondering if I should just give it a whirl and attempt to flash without the 1.8v adapter…

I tried it without the adapter, it was able to identify the chip too but it fried it miserably

[Lupo]

1. Be sure that the clip and the chip pins are contacting right and well
2. change the USB extension cable if you have another.In my case this was the problem and the chip wasn’t detected for many hours. I tested also to detect it without the 1.8v adaptor, it seemed that it detected the chip, BUT the chip data wasn’t right and the same as on the screenshots in the manual and video.

[Robert A]

Thanks for the input. It must be the adapter. I cannot think of any other reason. I have 2 CH341a programmer boards, and the adapter doesn’t work in either of them, and I also tried without an extension cord on a tablet… Guess I’ll have to order another 1.8v board….

 

[Martijn]

I also managed to mess up my Hi10’s bios settings – tablet wouldn’t turn on anymore after altering some. Unbelieveable there is no jumper or reset button to clear CMOS settings. Thank you Lupo for your detailed description, I have ordered the parts you suggested and will try to fix my tablet when they arrive.

[Martijn]

Well, today the last of the suggested components arrived (the clip-to-the-chip thing). I had no luck identifying my Chuwi Hi10 chip with the CH341A programmer software; although it’s drivers were installed without problems and the programmer software would read ‘connected’. I tried two computers (both win10), but no luck. Things would happen when clicking ‘write’ or ‘erase’, but I don’t think it actually did much. It would even start erasing without the clip attached to the chip.

I’m guessing my clip is a dud. One of the pins seems to be too short. I’ve ordered a new one. If that fails as well, I’ll throw this darn tablet in the bin and never, ever, EVER buy one of this brand again. (Although I was infinitely dumb to start messing with the BIOS on an otherwise fine tablet in the first place)

[Bill Christiansen]

@Martijn,

Just checking are you using version 1.29 of CH341A program and have selected Winbond W25Q64 in the chip type?

[Martijn]

@Bill
Yes and yes, plus all hardware parts listed in Lupo’s posts – connected them in the exact same way. Red cable is on the little indent where it should be.
I ordered a new clip, which has not arrived yet. If that fails as well, I might consider buying a slightly different programmer. Or I might toss the damn tablet in the bin after all :p

Strange though. I just tried my setup again. I still can’t identify the chip, it will say ‘Detection fails, cannot find the chip’. I can, however, read it, erase it and blank it. I cannot seem to get it to write (some timeout occurs) or verify.

[Paulo]

friends, someone tell me whether this adapter is for 1.8 Volts or not?

my chip is determined by, but not sure whether stitches or not.

 

[Bill Christiansen]

Paulo wrote:

friends, someone tell me whether this adapter is for 1.8 Volts or not? my chip is determined by, but not sure whether stitches or not.

You need to use the 1.8 volt adapter because although it may detect chip without it will damage chip. If unsure measure voltage at pin 1 with DVM

[qboy]

I have use a volt-meter to check the voltage on the BIOS chip.  It has about 2V across pin-8 and pin-4 after pressing power button for 2 sec on my bricked Hibook.

I am waiting for my programming kit to arrive.

I heard from other places in the forum that the BIOS contains the windows license key.  If you program the BIOS with a chip programmer, your tablet will have the same window license key as other people’s tablets who have programmed their tab with the same BIOS image.  Windows won’t work because the windows key is used by other person.  Is this true?  How to work around this?

 

[Author]

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