Locked BIOS help!

[R3DOPS]

I have a HP ProBook 640 that has a locked motherboard bios. I cannot change the boot or anything BIOS related on it without a key witch i don't have anymore. I have tried re setting the CMOS battery and a bunch other other things. The only thing i can think of doing is removing and replacing the CMOS chip. I do know how to solder but i only have done it to wearing for my car. What do you guys suggest? 

[njmyers3]

I'd try leaving it out for a really long time. If that doesn't work and it's imperative that you unlock the bios, you could make a brute forcing script on a USB Rubber Ducky and eventually get in.

[R3DOPS]

3 minutes ago, CUDA_Cores said:

Try leaving the CMOS battery unplugged for a REALLY long time (like a day). That may work.

Nope that did not work. 

[R3DOPS]

Just now, njmyers3 said:

I'd try leaving it out for a really long time. If that doesn't work and it's imperative that you unlock the bios, you could make a brute forcing script on a USB Rubber Ducky and eventually get in.

Ok that may help me. is there a tutorial i can watch to do that? 

[njmyers3]

Just now, R3DOPS said:

Ok that may help me. is there a tutorial i can watch to do that? 

Here's a video of them cracking it on an Android Phone. I imagine it would be even easier on a PC.

 

[R3DOPS]

Just now, njmyers3 said:

Here's a video of them cracking it on an Android Phone. I imagine it would be even easier on a PC.

 

Well im not going to try to do it if i dont see it done on a PC. They might use the different type of decryption and other things. 

[R3DOPS]

Just now, CUDA_Cores said:

I did some googling and apparently these are "enterprise" "business" laptops and cannot be reset by removing the battery. You apparently have to contact HP support for them to send you a custom bin file? I don't really know, but there is a blog post on HPs website about this:

 

https://h30434.www3.hp.com/t5/Notebook-Operating-System-and-Recovery/bios-password-on-probook-640/td-p/4958345

Do you know if i can just replace the cmos or bios chip 

[njmyers3]

Just now, R3DOPS said:

Well im not going to try to do it if i dont see it done on a PC. They might use the different type of decryption and other things. 

The ducky just acts as a human typing on a keyboard, but it can follow patterns. It would be as if you were there trying every single combination of keys. It would probably take a long time too, and it's quite impractical. I would just stick with the waiting method.

[njmyers3]

1 minute ago, R3DOPS said:

Do you know if i can just replace the cmos or bios chip 

Remove the CMOS battery and the laptop battery, then hold the power button for 20 seconds to release any leftover charge. Then I'd wait a day and see if it works.

[R3DOPS]

Just now, njmyers3 said:

Remove the CMOS battery and the laptop battery, then hold the power button for 20 seconds to release any leftover charge. Then I'd wait a day and see if it works.

No it wont work i have tried that many times 

[R3DOPS]

Just now, CUDA_Cores said:

Are you getting an 8 digit code that says "system disabled"?

No

[njmyers3]

It doesn't seem that there's a way to remove the bios password from a ProBook. I found many backdoor passwords for other manufacturers, but nothing for HP.

[Billy_Mays]

32 minutes ago, R3DOPS said:

Nope that did not work. 

He means long