I mentioned that it initially wouldn't boot, so I installed a BIOS that I downloaded from the website. After troubleshooting other issues, it's now taking a while to boot.

I've already read the guides; it's a job I've done before. But in this case, I couldn't do it with the tools I have.

Brand: Lenovo
Model: Thinkbook 14s G2 ITL.
sn: R913LS8R
motherboard: LV550 14 MB / 203008-2 / 448.0LY03.0021

Thanks to anyone who can help me....

Hello, I need to clean the region me
File attached
Thank you​...