SUMMARY
So far, I do not manage to get WIFI enabled by the useful steps at a fresh install of Kubuntu 24.04 LTS, at  this laptop:
Lenovo Thinkpad X230 i5, along with 4 GB RAM, 250 GB SSD. A quick internet search clarifies me that I am not the only one who deals with this problem.

I do work now with wired internet. However, this wired connection does not help me to get the WIFI enabled. Ticking the box for enabling WIFI is not possible. You can see it at the screenshot I send with this report. 

That's why, I have looked for methods to get WIFI enabled via the command line. No result. At this output report, you can see why:

bas@Camino:~$ iw dev
phy#0
        Interface wlp3s0
                ifindex 3
                wdev 0x1
                addr 9c:4e:36:aa:5c:d0
                type managed
                txpower 0.00 dBm
                multicast TXQ:
                        qsz-byt qsz-pkt flows   drops   marks   overlmt hashcol tx-bytes        tx-packets
                        0       0       0       0       0       0       0       0               0
bas@Camino:~$ sudo ip link set wlp3s0 up
RTNETLINK answers: Operation not possible due to RF-kill
bas@Camino:~$ ^C
bas@Camino:~$ ^C
bas@Camino:~$ nmcli radio wifi
disabled
bas@Camino:~$ nmcli radi wifi on
bas@Camino:~$ sudo nmcli radio wifi on
bas@Camino:~$ sudo ip link set wlp3s0 up
RTNETLINK answers: Operation not possible due to RF-kill
bas@Camino:~$ ^C
bas@Camino:~$ rfkill list
0: tpacpi_bluetooth_sw: Bluetooth
        Soft blocked: yes
        Hard blocked: yes
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: yes
bas@Camino:~$ 

See also, amongst other pages:

https://www.baeldung.com/linux/connect-network-cli

https://www.baeldung.com/linux/disable-wireless-network

STEPS TO REPRODUCE
1. The graphical check down under - trying to tick the box to enable WIFI. See also attached screenshot.
2. Command line checks summarised here - see here above. See also the two links for more info.


OBSERVED RESULT
Both checks did NOT end up in enabling WIFI.

EXPECTED RESULT
Enabling WIFI should need to be possible via either command line or the graphical approach.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
(available in About System)

Kubuntu 24.04 LTS

KDE Plasma Version:  5.27.11

KDE Frameworks Version: 5.115.0

Qt Version: 5.15.13.



ADDITIONAL INFORMATION