Can't get any reading with multimeter from power pins

I am guessing I am missing something obvious but I have an Uno board and when I put the leads into the 5v and gnd power pins I can't get a reading. It seems to have power since I burnt out an led when I placed it in those pins so what am I missing?

Thank you.

EDIT: Disregard. I think it was some user error with the multimeter.

Are there any LEDs lit on the Uno when it is plugged into USB power ?

And if you connect an LED with a 220 Ohm resistor to those pins does it light up?

If so I'd guess you have your multimeter on the wrong setting or the leads are bad or plugged into the wrong sockets.