Pc stuck on a black screen after bios update

[Adam18288228]

I was playing a game when I got a notification that I had an update so I updated, after the bios update was done it just turned into a black screen and my keyboard and mouse isn’t  lighting up.

[Adam18288228]

Also the pc can’t power off

[A_Gayathri]

Hi @Adam18288228 ,

Welcome to The HP Support Community.  

Thank you for posting your query, I will be glad to help you.

I understand the BIOS update might have caused an issue with your PC's startup process. Here’s a step-by-step approach to troubleshoot the black screen and power issues:
 

Perform a Hard Reset:

• Turn off your PC completely.
• Unplug the power cord from the PC and hold down the power button for about 15-20 seconds to discharge any residual power.
• Reconnect the power cord and try turning on the PC again.

Check for External Devices:

• Disconnect all external devices (keyboard, mouse, printer, etc.) except for the monitor.
• Try powering on the PC with only the monitor connected to see if it makes a difference.

Monitor Connection:

• Ensure that the monitor is properly connected to the PC and turned on.
• Verify that the monitor input source is set to the correct port (HDMI, DisplayPort, etc.).

BIOS Recovery:

• Some motherboards have a BIOS recovery feature. Check your PC’s manual or HP’s website for instructions on how to use BIOS recovery. This usually involves holding down a specific key (like F2, F10, or F12) while turning on the PC.

Clear CMOS:

• Turn off the PC and unplug it.
• Open the case and locate the CMOS battery (a small, round, silver battery on the motherboard).
• Remove the CMOS battery for about 5-10 minutes, then reinsert it.
• Plug the PC back in and try turning it on.

Check Power Supply:

• If the PC still doesn’t power off or on properly, there could be an issue with the power supply. Ensure all power cables are securely connected. 
   

Refer to this document: OMEN by HP 40L Gaming Desktop PC GT21-0000a User manual

I hope this helps. 

Take care and have a good day.

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