Locked up with a black screen

[Pigdoc]

Computer has locked up with a black screen and HP logo in the center 

[Deep_World]

Hi  @Pigdoc 
 
Welcome to the HP Support Community!

Thank you for reaching out. 

 I understand your HP desktop is currently stopping at a black screen with the HP logo displayed in the center. I know how important it is to get your system back up and running, and I'll be glad to help.

To better understand the situation, could you kindly provide:

• Does the HP logo remain on the screen indefinitely, or does the system eventually restart on its own?
• Do you hear any fan noise, beeps, or see any blinking LED lights (Power, Caps Lock, etc.)?
• Are any external devices connected, such as USB drives, printers, docking stations, or external hard drives?

In the meantime, kindly try the following troubleshooting steps:

1. Perform a Hard Reset  - Click here for steps
   • Turn off the computer completely.
   • Disconnect the power cable.
   • Remove all external USB devices except the keyboard and mouse.
   • Press and hold the Power button for 15 seconds.
   • Reconnect the power cable and turn the computer on.
2. Run HP Hardware Diagnostics  - Click here for steps
   • Turn on the PC and repeatedly tap the F2 key.
   • If HP Hardware Diagnostics opens, run: 
     • System Tests > Quick Test
     • Memory Test
     • Storage/Hard Drive Test
   • Kindly share the results if any test reports an error.
3. Check for BIOS Recovery - Click here for steps 
   • Turn the PC off.
   • Press and hold Windows + B.
   • While holding these keys, press and hold the Power button for 2-3 seconds, then release the Power button while continuing to hold Windows + B for a few more seconds.
   • If the BIOS Recovery screen appears, follow the prompts.

For additional guidance, kindly refer to these HP documents: HP PCs – Computer Does Not Start and Displays a Black Screen - Click here 

I hope this helps.