Thanks for the replies. It is a 2020 Onyx. The CCU has already been replaced about 6 months ago. I will try the update and report back.Been monitoring the forum for 3 years and I haven't seen anyone else with a blank front camera display - blue screen with lines.
While there's a slim chance that the latest USB infotainment software update from October 2022 will fix your issues, this may need a visit to the dealership for diagnosis.
It's possible that your front camera connection is poor or disconnected or that the front camera is defective, if it never turns on. You also might need a new "cockpit control unit".