My computer/moniter won’t come on

[JeannieB1]

My hp pavilion all in one won’t start

[Max3Aj]

@JeannieB1, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 
Let's try to get your HP Pavilion All-in-One PC powered back on. Here are a few steps to help diagnose and potentially resolve the issue:

Check Power Connection

• Ensure the power cable is securely connected to both the PC and the wall outlet.
• Try a different wall outlet or power strip.
• If available, test with a known working power cable.

Perform a Power Reset

• Disconnect the power cable from the PC.
• Press and hold the power button for 15 seconds to drain residual power.
• Reconnect the power cable and try turning it on again.

Look for Signs of Power

• Do you see any LED lights on the power button or hear fan noise?
• If the screen remains black but the power light is on, try pressing F10 or Esc repeatedly during startup to access BIOS.

External Display Test (if applicable)

• If your model supports external display output, connect it to a monitor to check if the issue is with the built-in display.

Disconnect Peripherals

• Remove all USB devices, SD cards, and external drives.
• Try powering on with only the keyboard and mouse connected.

BIOS Recovery

If the PC shows a black screen but seems to power on:

• Press and hold Windows key + B, then press and hold the power button for 2-3 seconds.
• Release the power button but continue holding Windows + B for 10 seconds.
• This may trigger BIOS recovery. 

I hope this helps. 

Take care and have a good day. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Select "Yes" on the bottom left to say “Thanks” for helping! 

Max3Aj

HP Support