Open it up. You may just have inserted crooked and it fell in.

Thanks galfert

Open it up. You may just have inserted crooked and it fell in.

Yep, I see what you mean now having photographed

Also at the same time I was talking with Nevada sales (excellent service BTW) and sending in an image of slot, I think as galfert said, I must have pushed the card into the slot by the side of the mechanism, i was sitting down and just casully replacing, NOT thinking this would be an issue, it did drop in and i spent some time looking around the machine to see where it had fallen out , picking up the console, i heard the rattle of the SD card inside !!!!!

Anyway , will know for sure tomorrow as i have orded a new microSD
But looking at the slot pretty sure thats what i have done,
Apparently the screen is mabe up of a number of parts and taking the backoff can cause issues with the screen

Image here of slot, just in case someone does the same as me
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yep,
got a new card and you have to be careful, slight angle with fat fingers and it will disappear into the machine.

so using a small pair of twisers to make sure lined up straight

All working OK
just have the old one on the machine , which as i dont move it about much should be OK , hopefully not near and contacts to short out

shame the back doesnt just pop off with the 4 screws