There's been a problem with my M10 powering off when I pressed RECORD, so I began using the remote. Yesterday it turned off pressing RECORD on the remote.
I had been suspecting it was a memory card problem because the cards weren't seated properly when inserted, one corner was higher.
Today the M10 would only stay powered on when there was NO card in the slot.
So I stuck a small piece of cardboard in-between the top of the card slot (with a card inside) and the card slot cover, and the M10 turned on and so far is staying on even when using operation buttons.
Probably the spring in the card slot has weakened -- my M10 is ten years old, and I've usually taken the card out when transferring files to my computer for faster download -- so it's had a lot of use.