hi, yes i just updated my 900 nx2 mixer and im not getting ant sound or any lights saying audio is being read via mixer.

To confirm: you updated the DJM-nxs2 Firmware to version 1.2? When you turn the mixer on, does the LED screen say Version 1.2?

We're going to need more information. When you say "not getting any(sp) sound/lights," how are you getting sound the mixer? CDJ/XDJ? Are you connecting via RCA/Digital coaxial or are you using the mixer as an Audio Interface with Rekordbox DJ/Traktor?

What  OS are you using?

The more information and details you can supply, the higher the chance we can try and help. FWIW, I updated to 1.2 with no issues.

Cheers.