My S61 is faulty

You supply far too little information. You neither state computer type , OS version , exact keyboard model , nor do you tell if it ever worked or if you have tried to fix any eventual connection problems ?

Your profile says Mac (model ?) so let's go with that, then you write "done the power on and off sequence" , which could suggest that your are having a S-Series MK3 and that you read something about that.

But what is exact situation ? Did the keyboard ever work ? Have you been updating firmware and having had a problem doing that ? Have you looked into the connection problems that you could be/have been facing regarding USB-C ports on some computers ?

Quote Matthew_NI, Product Team, October 1 :
Problem:
Some computer chipsets made between 2020 and 2023 have a known USB-C error that can't be fixed. This can cause sporadic problems with USB-C peripherals like the Kontrol S MK3, including connection failures, freezing, or issues with firmware updates.
Solution:
If you experience these issues, try using a USB-C hub between your Kontrol S MK3 and your computer. This can help avoid the problem and ensure a stable connection. This is critically important during firmware updates, as data loss could cause broken firmware. Make sure the hub supports both power and data transfer.

Also please check articles such as these :

Kontrol S-Series MK3 Troubleshooting Guide (includes link for Blank displays (Logic Pro))

Kontrol S-Series MK3: Avoiding Connection Issues by Using the Right USB-C Hubs and Cables (because of the more USB-C port standards and many companies not keeping specifications then that could be more tricky than appears unless using certified quality cable)

Kontrol S-Series MK3: Troubleshooting Firmware Update Issues

My Komplete Kontrol Keyboard Does Not Start
How to Switch a Kontrol S-Series MK3 Keyboard to MIDI 1.0
How to Integrate Your Kontrol Keyboard with Your DAW

How to Monitor the Output of a MIDI Controller

If problem persists then please contact N.I. Hardware Support

Thank you for the info .

Alas I have to add that the cable supplied with the MK3 keyboards has not always worked with all computers for all persons buying the MK3. The aforementioned problems regarding the USB-C connection has done that some people have had to use other cables and/or other ports on computer. Alas then for legal reasons and because of NDAs with other companies then N.I. have been unable to give sufficient public information so the really specific information is scarce to non-existent

The discussion here is alas typical for the situation and I am really no expert though I may try to assist as best I can. The statement from Matthew_NI is alas as specific as it gets and he is the expert on the keyboards. But otherwise if problem persists then please contact N.I. Hardware Support .

(I do have a collection of links for general statements on the problems by Matthew_NI if you want that , though I do not see that being of much more help here other than to illustrate the problems)

Please do not thread hijack , if you need a discussion or help with the lack of response that you have experienced then please open a thread of your own in the appropriate sub forum.

Generally then you ought to have received a email confirmation that your ticket has been opened - please also check email spam folder. (if do not receive a confirmation then something might have gone wrong with ticket creation).

After receiving email confirmation then please allow support up to a week to answer and if they do not respond within a week then politely update your ticket to let support know that you are still waiting for a response. Also N.I. support do not work in the weekend.

Since you have already made the post above then I will call for @Jeremy_NI and ask if he could please check you ticket state. (I am not an N.I. employee , Jeremy_NI is)