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MigElite
New Member
Last Activity: 03-23-2025, 02:02 PM
Joined: 02-22-2025
Location: Los Angeles, CA
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  • MigElite
    replied to chromebook hp pro c640 help
    Amazing! It worked out. Thank you soo much!!

    Here are some notes for other people trying this: Do Not connect the power cord while flashing BIOS (it can brick the chromebook and you have reflash again). After you flash the BIOS, plug in the power cord before turning on. Press Esc Refresh and power to boot into recovery. Use a USB drive to reinstall the Chrome OS.
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  • MigElite
    replied to chromebook hp pro c640 help
    Thank you. Here is my original backup of the bios. The serial number is 5CD051CCM1...
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  • MigElite
    replied to chromebook hp pro c640 help
    I also have a HP Chromebook Pro C640 with sound issue after unlocking. I was able to remove the enterprise lock. I used the BIOS from another unlocked C640. But just like someone else here mentioned, the sound is gone. The sound bar is greyed out and pressing the mute or volume buttons does nothing. There's also no sound from the audio jack, so its not a problem with the speakers. I returned back to the locked BIOS and the sound returned. Strange....
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