HP EliteBook 850 G8 Hard Brick after BIOS Read/Write - Seeking Clean ME Region (v15.0.50.2633)

[aboodonline]

Hello everyone,

1. I read the original BIOS dump using a programmer and immediately flashed it back to ensure the read was correct.
2. Since the first programming cycle (read and write-back), the system no longer boots and LED errors, which suggests a corrupt or initialized ME region that was only triggered by the programming cycle itself.
3. I attempted to clean the ME region myself by copying the ME region from another original dump. This attempt likely resulted in a hard brick, and the laptop no longer starts at all (no lights, no fan spin).
4. Currently, the original dump (Main.bin) is back on the chip, but the system still does not boot; the LEDs briefly light up, turn off, and then light up again (indicating a non-passing POST).

My Data:

• Laptop Model: HP EliteBook 850 G8
• Original ME Version: 15.0.50.2633
• Flash Image Tool: 15.0.23.1706
• SN: 5CG1311C6Z

Could someone please explain the cause and clear the ME of this BIOS file?