My caps lock works, but the LED light is always off

caesar238 wrote:

Hello,

Thank you for your reply.

I just tried safe mode and used another user account. It turned out that this is a universal issue.

The caps lock function still works when toggled on any account, but the LED light is still off.

Verify Full Keyboard Access is off...

>System Settings>Accessibility >Keyboard>Full Keyboard Access>OFF

ref: Navigate your Mac using Full Keyboard Access - Apple Support

I would try toggling/restore defaults keyboard modifier settings:

>System Settings>Keyboard>Keyboard Shortcuts>Modifier Keys Restore Defaults

Keyboard is controlled by NVRAM (Intel) you can see this from the Terminal.app, copy and paste:

ioreg -p IOUSB

Typically test results: 'universal issues" points to a hardware... as attempt to rule out all software you can try

resetting NVRAM/PRAM Reset NVRAM on your Mac - Apple Support

        (get at least two-three rounds of the chimes when holding the NVRAM Reset)

I suspect it is a hardware issue—you can make an appointment to get it resolved:

Make an appointment for a "hardware issue"

Genius Bar Reservation and Apple Support Options - Apple

Outside the USA

Contact Apple for support and service - Apple Support

Check your coverage

My Support - Official Apple Support

caesar238 wrote:

How do I fix this on my Mac?

I tried tap, double tap, I tried restarting my Mac. Nothing works. Thanks

To trouble shoot further you can:

—A SafeBoot How to use safe mode on your Mac - Apple Support will sort many anomalies. Log in and test.

a reboot will put it back to normal mode.

This test will tell you if third party interference; most* extensions etc are not loaded in safe boot mode.

—Test issue in another user (or guest user) account Change Users & Groups settings on Mac - Apple Support

This will tell you if it a universal issue or isolated to your user/admin account. 

FWIW, if you have an Intel MBA, you can try resetting the SMC.

Reset the SMC of your Mac - Apple Support