Hi scott,
Thank you for your detailed message.
I would like to know where you purchased the old working module, from Arducam or other vendor. Please see the screenshot below, it is a standard Raspberry Pi imx477 HQ camera, whose connector is different from this new camera module which is not working.
Besides, I attach the pictuer bwlow which shows correct hardware connection. You can see the metal pin rather than blue plastic as you showed in the previous answer. Please revert the connection here and try it again.
