Re: HP BIOS unlock tool

In your place I would flash the two previous dumps (CH341A and Flashrom) onto the new chip. Just to see if it works. If not, solder the original chip again, provided that the original BIOS is still on it. If you succeed with any of these options, you know where to start.

Re: HP BIOS unlock tool



That depends on your soldering skills. But due to the fact that you're asking, you'd better get someone to help you....

Re: HP BIOS unlock tool


Yes, I tested all the options I found. With and without battery, with and without power supply, with and without CMOS battery, with and without RAM, mixed, different software ... I never got a reading, not even a clean detection of the chip.


I was able to solve this Problem too. Sometimes it makes sense to read the readme, after all, someone has bothered to explain how the program works and what the requirements are....

Re: HP BIOS unlock tool

A beautiful good morning,
Thanks for the answers, here is another confirmed [B]unlock[/B] from an [B]EliteBook 850 G1[/B], YAY!
I don't know what went wrong on the last try. I removed the chip from the board again and read it out. The dump had many differences across the entire memory. So I deleted it again, flashed it, verified it with "ch341 Programmer" [B]and[/B] "AsProgrammer" -> Both passed. Soldered in, power on and it boots.
Many thanks to everyone involved for this interesting thread and especially...

Re: HP BIOS unlock tool

Hello everyone,
I bought a second-hand HP Elitebook 850 G1. After a while I wanted to make a few changes, including in the BIOS. I then found that the previous owner had not removed the administrator password. Unfortunately he also no longer replies to my attempts to contact him. After some research I came across this thread, got the necessary equipment and started.

1. Attempt to read out the Winbond W25Q128FVSQ-1442 on the board using a clip and CH341a (black) -> all attempts have failed

2. desolder the chip and try...

Re: New Members - please post your introductions here

Hello everyone my name is Ruedi, just an electronics enthusiast who tries to solve every problem. And repairing is still more satisfying than buying new. Greetz