Try turning off the power and all cords from the laptop and pressing the power button for 10-15 seconds. Then connect the power back and try turning it on. On the same model I had a problem with a dead battery and a dirty magicsafe contact

Look in the buffalo documentation for standard logins/passwords. 99% of users never change them

what NAS model? What type of raid was configured? 0/1/Jbod?