HP Laptop Boot Problems (BIOS/CMOS Checksum and Other Errors [500,501,502])

[mitsulang]

After a Windows "Firmware" update, laptop boots to black screen (LED backlight is on, however). I've tried every suggestion I've seen online. Win+B, Win+V, USB BIOS fix drive, etc. I cannot make any headway. Any suggestions are appreciated!

Laptop Model:

17-cp0025cl

Prod ID:

33Y42UA#ABA

OS Was:

Windows 11

[banhien]

@mitsulang 

Please use the following Guide

       https://support.hp.com/si-en/document/ish_4209641-3226345-16

Regards.

[mitsulang]

There's either a typo in your link, or the page doesn't exist. Could you check the link and resend it? Many thanks!

But I will say that if it's the article that says anything about using the Win + B, Win + V, or a USB bootable Bios drive, I've already done that, and it doesn't work. I've tried 4 different versions of BIOS, too...

EDIT: I removed the "si-en" part of your link, and it is, indeed, the article I was referring to. I've poured over that article, and tried every single thing on it. None of that works. I get either a 500, 501, or 502 error, depending on what's going on... I'm afraid I'm all out of ideas!