HP Elitedesk 800 G4 SFF BIOS/EC firmware error (Code 5.2) - Fixable?

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  • surcharge6650
    New Member
    • Dec 2025
    • 3
    • Germany

    #1

    HP Elitedesk 800 G4 SFF BIOS/EC firmware error (Code 5.2) - Fixable?

    Hello guys,

    I stupidly tried to read out my BIOS & EC flash (with a clamp). This didn't work, I only read FF's. But after this operation, the PC is not longer turning on, just beeps 5 times (and blinks red) then 2 times (blinks white). The manual says this is the error code for: "The embedded controller cannot find valid firmware.".
    I think it locked itself because of my experiment. Is this fixable? I now removed both chips from the board and dumped them, I attach the files in this post hoping someone can help me fix my stupid error. Thanks so much in advance anyone who is reading this. Here is my serial and model number:
    • HP EliteDesk 800 G4 SFF
    • SP# L22110-601
    • PGTXL0GCYC12O4
    • S/N on the casing: CZC912B82Y
    Thanks again to anyone reading this, I'm hoping someone knowledgeable is able and willing to help me out with this.
    Attached Files

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    Last edited by surcharge6650; Today, 09:56 AM.
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