Screen locked but lines accross

[Sandrajpk73]

My screen keeps locking but looks like loads of bar codes flashing on my screen. Lap top will not switch off or when I try control,alt,delete.

Help !

[Echo_Lake]

@Sandrajpk73

Welcome to HP Forums,  

This is a great place to get support, find answers and tips,
Thank you for posting your query, I'll be more than glad to help you out 🙂

I see that your experiencing issue with the screen locking up and laptop will not shut down. 

Don't worry as I'll be glad to help, however, to provide an accurate resolution, I need a few more details:

• When was the last time it worked fine? 
• Have you made any hardware/software changes?
• Have you tried any troubleshooting steps?
• Did this happen after a recent window or software update?
• Could you please share the screenshot of the display?

​​​​​​​While you respond to that, let's try these steps: ​​​​​​​

Hard reset:

1) Shutdown the computer.  

2) Unplug all the Adapter and peripherals connected.  

3) Press and hold down the power button for 15 to 20 seconds.  

4) Plug-in the Adapter.  

5) Try to turn on the computer. 

Hope this helps! Keep me posted for further assistance.

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Followed by clicking on "Accept as solution" from the drop-down menu on the upper right corner,

Thank you for posting in the HP Support Forum.  Have a great day!