Desalt skill saw

[dustawaits]

I have a 7 inch Dewalt I bought and used last year. It has been in the tool
box since then. This morning I got out to cut a board and when the blade
touches the board it stops and will not cut. Is there a button somewhere
on the saw that causes this? The blade was on when I bought it new so I do
not think it loose , anyway it cut all the lumber with no hesitation after I bought 
it, so why not now?

[feather]

Is there some kind of safety switch that requires you to hold it a certain way?

[dustawaits]

If there is feather, I must have turned it off or something or would it be on.
There is such a thing as saw stop but I really do think for this small saw.
😏 the board is not my finger!