I got it fixed thanks. Bad connection onto micro SD card. Opened the gadget and as soon as I touched the card it started working. So I removed it and cleaned it and the contacts with IPA then reassembled it and its still good.
I will attach some pics showing how to take it apart.
Prise off end plate. I think this is stuck with super glue. Might need to get sharp blade. I have a bunch of phone repair tools.
Top plate then slides forward then up. Again might need to break the edge.
You then need to carefully peel off copper tape to expose the SD card.
Remove it by pushing down on the end then it pops up.
Reassemble in reverse order.
