Is a camera required to check a faulty headset?

Mar 8, 2021
I’ve purchased a used PSVR headset off FB Marketplace with the intent to sell on. I need to check if it’s fully working before I list it but it didn’t come with the camera. Currently, when powered on there’s nothing on the PS VR ‘screens’, but the two lights on the rear of the headset are lit. I’m unable to run setup as the walkthrough requires a camera to complete setup.

So, my question is: should I be seeing ANYTHING on the headset screens at all, even though there’s no camera attached or do they only turn on when the camera is detected?