Monitor display screen background is black.

[Bridgewater75]

The background on my monitor screen is now black.  See photos.  My task bar icons light up yellow when I click on them (never did that before).  It's hard to see and read all my data. I went into Settings, but there were no instructions on how to restore my monitor to its original screen.  I went into Word, opened up a document to print, but it printed out blank.  Can anyone help me figure out what happened?  Thank you.

[Echo_Lake]

@Bridgewater75
Thank you for posting on the HP Support Community.

• Did this happen after a recent window or software update?
• Have you made any hardware/software changes?
• Have you tried connecting to an external monitor and checked?

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

Hard Reset: Follow steps from the link: https://hp.care/2GnkMa8.

BIOS default: 

1. Turn off the computer and wait five seconds.
2. Press the Power button to start the computer and repeatedly press the F10 key to enter the BIOS setup menu.
3. On the BIOS Setup screen, press F9 to select and load the BIOS Setup Default settings.
4. Press F10 to Save and Exit.
5. Use the arrow keys to select Yes, then press Enter when asked Exit Saving Changes?
6. Follow the prompts to restart your computer.

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.