@malkiza I got it. I've downgraded my bios without the signature file using a 8 pin SOIC8 test chip, jumper wires and a Raspeberry pi4. Here are...
Hi guys, I have a HP ENVY 15t-q100 (J4Y24AV). It uses an InsydeH2O®. I`ve updated my bios (0229E) from F.13 to F.30 and I want to downgrade it,...