This code could be a series of beeps or LED flashes from your Caps Lock button. A blink code list can be found on your computer manufacturer's website.

If the Caps Lock turns on and off by itself on Windows 11/10, it could be a software or a hardware fault. Before jumping to a conclusion, see this post.

You can play a warning tone or sound when you press Caps Lock, Num Lock or Scroll Lock keys in Windows 11/10. Play audio when you activate a special key!

So, I was working on my Dell D600 last night when it completely froze on me. Forcing a power down by holding the power key and then trying to boot up again yielded nothing but a flashing CAPS lock ...

This tiny utility shows at-a-glance if your Caps Lock, Num Lock, and/or Scroll Lock are activated.