Bricked HP Probook 450 G7 Bios questions

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  • studdy05
    New Member
    • Jul 2025
    • 1
    • United States
    #1

    Bricked HP Probook 450 G7 Bios questions

    Hp Probook 450 G7 s# SCD0348W35 had a locked BIOS. Bought BIOS and EC chips off Ebay that were supposed to match this machine - the 450 G7. Flashed in the BIOS on chip i bought using a CH341. BIOS unlocked next boot. Some error to contact HP. Entered BIOS and reset to system defaults and rebooted. Machine worked fine but every cold boot the contact HP message popped and everything else worked as fine. Assumed the error was from EC chip not matching BIOS that i just flashed in. So i flashed in the EC that was supposed to match from the EBay chip i bought and instant brick.

    Ive got a TWO of these exact same laptops, same model, same build, and the other is still locked and untouched.

    Ive tried working with ChatGPT sending HP Bios, my unlocked working BIOS, the ebay vendors BIN files and nothing so far has unbricked it.

    Getting two flashing power button lights with caps lock lights. Ive even unsoldered and reflashed the chips and soldered them back on the motherboard rather than just using the clip.

    My questions are can the twin working machine i have that is BIOS locked - can the BIOS and EC BIN files be used to flash in to the other bricked machine?

    Does the BIOS need the serial number and machine specific data that I have to add via HEX editor perhaps?

    Can the BIOS on the HP site somehow be used to reflash the BIOS and EC (ive tried this a couple of times with no good results but newbie)

    Can someone tell me what I'm missing and need to research and study? Im trying to get educated what is going on but hit walls.
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