Asus UM433D - UX434DA boardview and schematics

[orion78fr]

Hi !

Do anyone have boardview and schematics for the Asus motherboard UX434DA for the laptop UM433D ?

I need them because I'm going to try to bypass bios password by shorting the SCL and SDA pins while the BIOS checks the password as told in this article : https://davidzou.com/articles/bios-password-bypass
I can't find any way to recover password (alt+r while prompted for password doesn't work). If you know any other way to bypass the bios password, I'll gladly take it.

If nobody have these, can someone tell me which chip is the bios on this board ? Is it the gigadevice GD25LB64C, as I'm guessing ?

Thanks a lot !

[SMDFlea]

Re: Asus UM433D - UX434DA

Hi !

Do anyone have boardview and schematics for the Asus motherboard UX434DA for the laptop UM433D ?

I need them because I'm going to try to bypass bios password by shorting the SCL and SDA pins while the BIOS checks the password as told in this article : https://davidzou.com/articles/bios-password-bypass
I can't find any way to recover password (alt+r while prompted for password doesn't work). If you know any other way to bypass the bios password, I'll gladly take it.

If nobody have these, can someone tell me which chip is the bios on this board ? Is it the gigadevice GD25LB64C, as I'm guessing ?

Thanks a lot !

You can`t short the bios chip on this board to remove the password, you could even damage the chip or brick the motherboard. The article shows a small chip with the name L08 on it, that chip is installed on some lenovo motherboards.
Make a backup of the GD25LB64C chip and post it in the laptop "Bios requests ONLY!" sub forum -> https://www.badcaps.net/forum/forumdisplay.php?f=40 and someone will fix it for you

[orion78fr]

Re: Asus UM433D - UX434DA

Well, I don't know what to say, I tried it anyway before you answered the thread and it worked.
I successfully glitched the bios password read to a null (I guess ?) after a few tries and then changed it after in bios options.

Anyway, I couldn't find the boardview & schematics anywhere, so if anyone have it, it'll be useful for the next person that need it.

[anshad]

Re: Asus UM433D - UX434DA

Well, I don't know what to say, I tried it anyway before you answered the thread and it worked.
I successfully glitched the bios password read to a null (I guess ?) after a few tries and then changed it after in bios options.

Anyway, I couldn't find the boardview & schematics anywhere, so if anyone have it, it'll be useful for the next person that need it.

That doesn't make any sense. What you short in ThinkPad laptops is not the BIOS chip but a security EEPROM chip. By shorting the chip, you are essentially preventing the BIOS from reading the chip and hence the hack works. In your case, the chip you were referring is a BIOS chip. Shorting it's pins should have prevented the system from reading the BIOS code and one should expect no POST as a result. Shorting the BIOS chip prevented the system from exclusively reading the password part but has no problem reading the rest of the BIOS code and generate display ?

[orion78fr]

Re: Asus UM433D - UX434DA

So, I had a button soldered between pins 5 & 6. If I shorted too early in the boot process, I got no POST, obviously. If I shorted too late, I got the password prompt. But one time, I saw the bios screen. I probably successfully shorted the two pins just after the boot sequence and just before the bios password read by the CPU ? I don't really know. Took ~ 20 tries to get the correct timing. All I know is that I got rid of this annoying password and the computer works...

[alltvrepairs]

Asus Zenbook 14 UM433D main board and/or schematics

Hi,

I have been donated this Notebook. The battery connector was broken by owner. I have tried to resolder direclty to main board worked fine but accidentally a piece of copper fall on the board near the supply charging connector and switched off. Tried with the multimeter for possible shorts or evident damage but could not find any obvious.

Any help pls or someone having a replacement main board at a reasonable price?

Tks

[Vesko356]

Re: Asus Zenbook 14 UM433D main board and/or schematics

Hi,

I have been donated this Notebook. The battery connector was broken by owner. I have tried to resolder direclty to main board worked fine but accidentally a piece of copper fall on the board near the supply charging connector and switched off. Tried with the multimeter for possible shorts or evident damage but could not find any obvious.

Any help pls or someone having a replacement main board at a reasonable price?

Tks

This is "Schematic Requests ONLY" sub-section, if you want help beyond a shematic request you can open a thread at the Tech section:
https://www.badcaps.net/forum/forumdisplay.php?f=23

"Looking To Buy" sub-forum is here:
https://www.badcaps.net/forum/forumdisplay.php?f=13

Read the rules.

.