How to remove the forgotten bios password

You have an HP Commercial PC :-(. HP dropped the bypass years ago on notebooks (still allows a BIOS reset on commercial desktops, but some make you enable it first now). That said, if you are able to dump your BIOS chip, run it through HPUnlocker, then reflash the main primary chip(1), then you can remove the BIOS password -- the catch is the machine will be in unlocked manufacturing mode and you need to reprogram the data back onto the machine with HP BCU or HP CSML - you need to archive the info digitally beforehand as you can sometimes get the feature byte from HP PartSufer but it's also coded such we can just grab it from firmware. You'll also need to plug the old UUID or add 1 to the file for BCU or files needed with CSML, as it generates a random UUID. This isn't an amateur friendly job, and HP no longer supplies the unlocking .bin files since at least the G3 machines.

The first step is dumping the BIOS - use a CH341A or similar programmer - You need to dump it in a program like HxD and save it as a .bin file. You will run it through HPUnlocker, and then it will output a unlocked BIOS image. That needs to be manually flashed.

You flash it in a similar way as to how you dumped it - open the "unlocked" BIOS file, and then you will need to write it to the flash chip. As soon as that is done the machine will be in manufacturing mode - this is where HP BCU or CSML come in -- old machines can use both, but later machines past the G9 are unknown - they might not support BCU, just CSML. From my understanding, the G10 and up still use BCU for low level programming, but the CSML tool for everything else. Yours can use BCU as the sole tool. The good thing is the TPM and other data remains committed - it just "wipes" the serial and other data.

This is also an option as it will be treated as a new board with that data. There’s a chance it will still fail but give it a try: https://h30434.www3.hp.com/t5/Business-P...

https://www.scribd.com/document/76743518...

Archive: 767435189 HP Commercial Desktop Step By Step Guide 2 10

''(1) You have a non SureStart model, so none of that will get in the way - HP started adding it with the G3 EliteBooks -- yours likely still has dual BIOS chips, but not SureStart -- so you still need to program the right one. This will tell you if yours is SureStart or not: https://support.hp.com/us-en/document/is...

DO NOT LOCK THE SETUP UNTIL EVERYTHING IS SET AS YOU CANNOT UNDO IT - double and triple check your work. If you do the random UUID, generate a new file to lock the BIOS back up and then do it - do not use the "1" UUID file.

You can find the HP tools to program the DMI region here: https://www.hp.com/us-en/solutions/clien...