Many old BIOSes have a preset but secret backdoor password.
But I happened to stumble across this page today.
It describes how to crack the BIOS password on those systems which print a code if you enter the wrong password too many times. It also offers a range of Windows executables (.exe files) for each model which can translate that code into the original BIOS password!
From the user comments, it appears to work for many systems (I have not tried it 'for real' myself).
This seems like a useful addition to a Techies toolkit (the exe files need .NET and a Windows OS), especially if the customer has forgotten their BIOS password and you need to change the settings.
There is also a simple 'unlocker' web page here which contains the same code but for all types of system (obviously needs internet access and a browser).
Another useful web page (with unlocker script which doesn't seem to work for me?) is here.
But I happened to stumble across this page today.
It describes how to crack the BIOS password on those systems which print a code if you enter the wrong password too many times. It also offers a range of Windows executables (.exe files) for each model which can translate that code into the original BIOS password!
Fujitsu-Siemens BIOS pwd cracker
From the user comments, it appears to work for many systems (I have not tried it 'for real' myself).
This seems like a useful addition to a Techies toolkit (the exe files need .NET and a Windows OS), especially if the customer has forgotten their BIOS password and you need to change the settings.
There is also a simple 'unlocker' web page here which contains the same code but for all types of system (obviously needs internet access and a browser).
Another useful web page (with unlocker script which doesn't seem to work for me?) is here.