Bios reset on Motherboard ADVANTRON EBC-EA01PSM

[banane]

Hi everyone,

I try to get rid of the power on / bios password on a small industry mainboard I found.

It has "EBC-EA01PSM Rev.A101-2" printed on.

The internet tells me it was sold on aliexpress for a while ???

Removing the bios battery gives me at least the following information on top:
American Megatrends Version 2.15.1226.

Any ideas what to flash on it to make the pw dissapear? I already took a dump of the bios.

Thanks
Banane

[banane]

Re: Bios reset on Motherboard ADVANTRON EBC-EA01PSM

Opening the dump with UEFITool I found a NVAR entry called "OEMDEFAULTPWDSetup".

How can I edit this entry ?

Fixed: Yes
Base: 638h
Header address: FFC00638h
Data address: FFC00656h
Offset: 5F0h
Variable GUID: F2403E02-AE55-40F4-ABD9-E21EC2E8E8FD
GUID index: 8
Full size: 1Fh (31)
Header size: 1Eh (30)
Body size: 1h (1)
Attributes: 83h (Runtime, AsciiName, Valid)

[banane]

Re: Bios reset on Motherboard ADVANTRON EBC-EA01PSM

Tried to clear all the NVRAM with 00h, did not help.

[banane]

Re: Bios reset on Motherboard ADVANTRON EBC-EA01PSM

I can't believe it, I found the password via AMITSEDecrypt.py, see https://www.badcaps.net/forum/showth...etup+Decryptor.

I think the Advantech AIMB-224 is the same, by the way.

@EineWildeStehlampe, vielen, vielen Dank :-)