Laptop crashes when press caps lock

[Gleemills]

Hello laptop switches off whenever I press the caps lock key.  I need to press power on to get it to start up again. It boots into diagnostic mode when it comes back up.  I tried connecting an external keyboard and it happens with the caps lock key on that as well.  

[Echo_Lake]

@Gleemills

Thank you for posting on the HP Support Community.

I have a few troubleshooting steps we could try to fix the issue:  
Let's perform a Hard reset on the notebook: A power reset (or hard restart) clears all information from the computer's memory without erasing any personal data. Performing a power reset might fix conditions such as Windows not responding, a blank display, software freezing the keyboard stops responding, or other external devices locking up.

Next: Restore BIOS default settings.

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?

Hope this helps! Keep me posted for further assistance.
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