HELP - autofocus not working properly on Sony A7R2.

[busterbboy]

Yes, help - I have a shoot tomorrow, and my  autofocus isn't working properly!

I'm not getting any green squares or any focus information anywhere, and nothing happens when I press the shutter button halfway. My eyesight isn't good enough for manual video shooting.

I'm on manual mode, AFC, wide focus area, centre lock on autofocus off. I've tried various focus areas, various focus modes, various lenses (Sony Zeiss, and a new Tamron 28-200 zoom) and still no autofocus. Switched on and off - no focusing guides, no focus - nothing.

Not only that, but I get no zebras or histograms on manual focus. My eyesight isn't good enough for manual focus these days.

So I'm in big trouble, so any suggestions very welcome!