[Bilajio]

So it's funny you should have this, as I've just gone through the same issue.

Display key completely died after about a month of the display battery dying.

Couldn't even get into the car.

I unlocked the car via iPhone through the app

Put the fob in the charging tray, it briefly came to life and display went black again, but it would allow me to start the car.

So since then, I've had in the wireless charging tray all day and still no charge.

I've plugged it into the mains with a micro usb and it's now charged up and working fully.

I found just keeping a hold of the power button (3-5 seconds) did bring it to life.