Clear CMOS on unowhy Y13 Ultrabooks on motherboard

[corona100]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

I also am facing the same black screen as I wanted to install Manjaro Linux using a USB key and modified
* / Setup / Chipset / Southbridge / OS Selection from "Windows" to "Linux"
* / Setup / Boot / USB Support from "Partial Initial" to "Full initial"
after save & exit got the black screen...

So I ordered my ch341a... am waiting and discovered AMIBCP

Have you tried opening your own dumped "borked" bios bin file in AMIBCP, changing the Setup/Boot/Fastboot parameter (cf. attached screenshot), saving under new name and flashing the modified bios ?

Bios contains the Serial Number of the Y13 computer (cf. attached screenshot)... so maybe its not just information and checked agains someting/somewhere and that's why flashing someone elses Bios is not working for you when you flash it...

i try allready with another dump of some one and i change the serial u will find 2 serials but unfortnly not work

[dwardo]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

I also am facing the same black screen as I wanted to install Manjaro Linux using a USB key and modified
* / Setup / Chipset / Southbridge / OS Selection from "Windows" to "Linux"
* / Setup / Boot / USB Support from "Partial Initial" to "Full initial"
after save & exit got the black screen...

So I ordered my ch341a... am waiting and discovered AMIBCP

Have you tried opening your own dumped "borked" bios bin file in AMIBCP, changing the Setup/Boot/Fastboot parameter (cf. attached screenshot), saving under new name and flashing the modified bios ?

Bios contains the Serial Number of the Y13 computer (cf. attached screenshot)... so maybe its not just information and checked agains someting/somewhere and that's why flashing someone elses Bios is not working for you when you flash it...

[highsnoop]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

I flashed this bin file whose it the same version of mine.

I checked, erase, write , read and save it to compare to the original and no difference.

I desoldered all, check short circuits
Start the notebook and same result "Power led with black screen"

No idear....

[highsnoop]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

With the AMIBCP tools i read my dump

BIOS Date: 10/28/2020 19:55:13 Ver: 3BAPS05
American Megatrends Inc.
V0.5.0_P1S0M2E0F3L6B0T0P2G00A0U0D601_ENE
10/28/2020


Can i set option directly from this tools or can i do it with another one ?

[highsnoop]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

For the expert

It's the same model of this thread https://www.badcaps.net/forum/showpo...91&postcount=2

So can i put this bios on my mine without problem ?

Thanks

[highsnoop]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

Salut highsnoop
J'essaye aussi de dumper et remettre un autre bios dans un unowhy.

Quel outil tu as acheté pour réaliser la manip ?
Merci d'avance.

CH341a + adaptor 1.8v

For the driver + tools : Driver+tools

Impossible de lire la puce avec la pince, j'ai directement souder (voir photo) les pin 1 2 4 5 6 8
Attention ce n'a pas été facile car c'est très petit et la solution avec l'air ne pas convaincu avec le nombre de petite résistance proche du chip.

Pour l'instant je suis toujours bloqué et en attente d'un modification de mon Bios ou bien d'un bios compatible pour le remplacer

Impossible to read the chip with the pliers, I directly solder (see photo) pins 1 2 4 5 6 8
Attention it was not easy because it is very small and the solution with the air does not convince with the number of small resistance close to the chip.

For the moment I am still stuck and waiting for a modification of my Bios or a compatible bios to replace it

[YourBlamp]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

hi highsnoop
I also try to dump and put another bios in an unowhy.

What tool did you buy to do the trick?
Thanks in advance.

[highsnoop]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

Yattaaa
I managed to solder directly on the chip after one hour of fight.
I got the dump of my bios (I doing it twice time to compare result and the both files are identical).

Does the parameter to change in the file is my picture proposal (A Vs B)?

Thanks again for your help and hope my story can be help anyone in this adventure

or if someone can provide the same bios version (i don't know what is it) without password

Bios - https://www.badcaps.net/forum/showthread.php?t=115849
.

[reformatt]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

Direct read from a chip on a board rarely works, so you'll have to remove it. I think in that kit, they give you a small PCB to solder the chip onto. You have to use hot air for WSON8 EEPROM's.

There is another adaptor I use that doesn't require soldering if you are interested. You have to wick the pads clean usually and clean up in IPA before good contact is made though.

https://www.aliexpress.com/item/1005...8daDVlmaC&mp=1

[highsnoop]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

I used a voltmeter between 8 and 4 and I get 1.8V so the voltage was set correctly.
So I think it's the connection with the clamp around the chip...
I will try to weld it but it's very very small....

[highsnoop]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

i tried with another chip from an older motherboard

Asus M4A785STD-V
Chip : CfEON EN25F80
https://pdf1.alldatasheet.com/datash...N/EN25F80.html
Full voltage range: 2.7-3.6 volt

so without 1.8v adaptor i get something from the chip (No detect automatically, i selected it manually)

see capture too confirm

So the issue can be from Adaptor or chip
I don't have others chip in 1.8v

[mon2]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

Be sure your tools are supporting and configured for 1v8 operation. Otherwise this flash chip will be killed.

You will need to remove the flash chip off the logic board and then proceed to use the programmer to read / write / erase the chip.

Be very careful on the hot air tool that can and will hurt the display or any nearby plastic parts. Keep the air flow low and ample flux to remove the part. Practice if required on other donor boards first.

[highsnoop]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

I received everything needed but I find an empty chip

Before plug ch341a key on pc (windows 10), i check with a tester the good contact with pins on motherboard to the adaptor 1-1 2-2 3-3 ....

The chip doesn't be found with asprogrammer, i selected GD25B64C in the device list manually without success

thanks for what i am wrong

[reformatt]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

Wondering if this thing is a rebadged Chuwi, as it sounds like they have the same issues on those lappies. The settings seem to be stored within the EEPROM and are non-volatile. Hence why removing the battery won't work. Cheap garbage from China.

https://forum.chuwi.com/t/i-need-a-w...2778/65?page=2

Where to get a donor BIOS from though?

This kit on Aliexpress has everything included the 1.8V adaptor.

https://www.aliexpress.com/item/3278...8dat0Nx70&mp=1

[highsnoop]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

With adaptor 1,8v because ch341a=3,3v like raspberry

[highsnoop]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

With difficulty i Can read the chip ref

Gigadevice
25lb64cvig
Ef8211
Aj2039

The voltage seems to between 1.65 and 2.0

Here is the Doc https://www.mouser.fr/ProductDetail/...IVPR6ZyQ%3D%3D

If you confirm, i will buy a ch341 like this
ch341a

Sorry for sponsor but not choice 🥴
Thks for your help

[reformatt]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

On board read/write of SPI25 EEPROM's is a bit hit and miss for me. It's quicker just to hot air it off and put it in a programmer. If the EEPROM is near anything heat sensitive (or I don't want to take the board out), I use Chipquik on the pins and it will just come off with an iron.

Any SPI25 programmer will work, even CH341. You may need a 1.8V adaptor though if the EEPROM you are trying to read is 1.8V variant. Check datasheet of the EEPROM to confirm.

[highsnoop]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

https://github.com/bibanon/Coreboot-...h-Raspberry-Pi

But does each chip have the same schema ?

example
https://1.bp.blogspot.com/-oqp22M52C...o2+diagram.jpg

Can i used only pin : 1 2 4 5 6 only (used O for the welding) ?

[mcplslg123]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

I've no idea about raspberry as i've never used it. Any SPI programmer will read /write your bios chip. If you dont have the tools, you can get it done by a repair shop in your location.

[highsnoop]

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

I watched a lot of youtube videos on eproom flash in recent days

But this problem (black screen after changing a setting in the bios) happens several times on noname motherboards (like pipo X8)
Because the manufacturer uses a common bios with all the options not available on its own device

I can't read the chipset number So I can't figure out how to make a short circuit (pin x to pin y) like a clearcmos jumper without the risk of burning it.
My last chance, as you both said, is to read the eproom with my rasbperry (I've never done that before ) to read/delete/write I also don't know the voltage for this chipset (3.3V?)

any help are welcome
Thks