Laptop dead after BIOS update

[Q_S]

Hi - had a machine presented with motherboard issues so a replacement was fitted. Everything fired up OK so motherboard was working. Machine did a reboot and suddenly it was doing a BIOS update. The power went off and now I cannot get it to power on again. Tried all the usual disconnect battery and keypress options but no power light. Everything seems dead.

Has anyone any other suggestions please?

[Deep_World]

Hi @Q_S,

Welcome to the HP Support Community!

Thanks for reaching out!

We're thrilled to have the opportunity to assist you and provide a solution.

Sorry for the inconvenience caused don’t worry let me help you.

To better understand the issue, could you please provide a few more details?

• The exact model of your HP laptop.
• Whether the BIOS update was initiated automatically or manually.
• If you notice any signs of life when pressing the power button (fan spin, faint LED blink, or charging light when the adapter is connected).

In the meantime, here are a few troubleshooting steps you can try:

• Power reset: Disconnect the AC adapter   Hold the power button down for 30–40 seconds, then reconnect only the adapter and try powering on.
• Check adapter and port: Ensure the charger is working by testing with another compatible adapter or checking the charging LED.
• CMOS reset: If accessible, remove the CMOS battery for a few minutes, then reseat it. This can sometimes clear a corrupted BIOS state.
• External display test: Connect to an external monitor to rule out display issues.
• USB recovery attempt: If the system shows any sign of power, you may be able to create a BIOS recovery USB drive from HP’s support website and attempt recovery.

If the laptop remains completely unresponsive (no lights, no fan, no charging indication), it may point to a failed BIOS flash or power delivery issue on the new motherboard

I hope this helps.

I'm glad I could help! 😊 If this resolved your issue, please mark it as "Accepted Solution" and click "Yes" on "Was this reply helpful?" Your feedback not only keeps us going but also helps others find the solution faster! 

Take care and have an amazing day ahead! 

Best regards,

Deep_World