Screen has horizontal lines

[KAUAIAMY]

Screen has horizontal lines running all throughout, almost impossible to read anything. 

The PC also shuts down and restarts, sometimes 4 times a day, not sure if it's related to the screen issue.

Not sure if it's a software or hardware problem.  Any help would be greatly appreciated. 

Thanks

[asmita6658]

Hi @KAUAIAMY

Welcome to the HP Support Community. I'd be happy to assist you with the display issue. 

Let's try these steps to re-install the display driver -

1) In the search box on the taskbar, type Device Manager, and then select Device Manager from the list of results.
2) In Device Manager, expand Display Adapter. 
3) Right-click on the Display Adapter, and then select Uninstall device > Delete the driver software for this device check box > Uninstall.
4) Restart the computer.

Try updating the computer - 

Step 1 Windows Updates - 
1) In the search box, type and open Windows Updates. 
2) Check for updates. 
3) If the updates are available, click on install and restart the computer. 

Step 2 HP Support Assistant Updates - 
1) In the search box, type and open HP Support Assistant. 
2) Check for updates. 
3) If the updates are available, click on install and restart the computer. 

Also, try updating the BIOS.  Refer to this document for steps - HP Consumer Desktop PCs - Updating the BIOS (Basic Input Output System)

You may also try the steps mentioned in the guided troubleshooter. 

Hope this helps! Keep me posted. 

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Have a great day!