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highsnoop · 02-20-2023, 02:25 AM

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 · 02-19-2023, 01:57 PM

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 · 02-19-2023, 07:09 AM

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 · 02-19-2023, 06:37 AM

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

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...

highsnoop · 02-18-2023, 03:09 AM

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/f...

highsnoop · 02-17-2023, 09:13 AM

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 · 02-17-2023, 08:49 AM

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...

highsnoop · 02-17-2023, 05:18 AM

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...

highsnoop · 02-15-2023, 05:00 AM

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

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

highsnoop · 02-15-2023, 01:11 AM

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

highsnoop · 02-14-2023, 12:31 PM

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) ?...

highsnoop · 02-14-2023, 07:06 AM

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,...

highsnoop · 02-14-2023, 02:21 AM

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

This is the picture of a part of the motherboard.
You will see the bios chipset and the connector to manage it.

I think something can be executed from here to reset or update the code when the laptop boot on a black screen...

highsnoop · 02-14-2023, 12:25 AM

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

Thanks for your proposal but i don't have a BIOS backup.
I didn't update it, I only changed a simple parameter.
I never has been get this issue with a real motherboard (MSI, ASUS, LENOVO; ACER,...)

I hate noname without technical documentation

The ultrabook don't boot from USB too, so how I can flash the BIOS if a get a BIOS flash file ?...

highsnoop · 02-13-2023, 10:09 AM

Re: Clear CMOS on unowhy Y13 Ultrabooks on motherboard

I tried with Internal battery disconnected
- 5x time slowy
- 5x times quickly
- 5x time slowy + external power
- 5x times quickly + external power
- 1x long time 60s
- 1x long time 60s + external power
- 30x times quickly

no result , black screen with led power on

Thank you anyway...

highsnoop · 02-12-2023, 01:28 PM

Re: Clear CMOS on Ultrabooks on motherboard

So where is the CMOS battery ?
If it too simple for you

...

highsnoop · 02-12-2023, 05:07 AM

Re: Unowhy y13g010s4ei

I saw this on motherboard

BIOS and RTC...

highsnoop · 02-12-2023, 04:58 AM

Re: Unowhy y13g010s4ei

Hi,
I am in the same situation of Hjacks.
Do you found any clear cmos procedure ? jumper, battery or other

I removed the motherboard and wait 4 H = no sucess
I disconnect the LIpo battery 24H = no sucess

Any other help appreciate

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my unowhy Y13 black screen

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Clear CMOS on unowhy Y13 Ultrabooks on motherboard

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