If you leave it plugged in to the enclosed power adapter the app will all ways be able to find it. And depending on your tv it will turn on when you cast. My computer is not in the same room as the TV when I cast a chrome tab I don't have to worry about finding it. Most of the time the TV will switch to the chrome cast.
Sent from my XT897 using XDA Premium 4 mobile app
Screwed by Google. Canceled ICS upgrade on my Moto Photon 4G.
Motorola Photon Q 4G LTE - CM 11.0 Nightlies - On ting.com - only Pay for what you GET.
Amazon Kindle Fire - CM10.1 + 3.x Kernel
Retired, Kids Toys, Gave Away &/or Bricked; HTC G1, Samsung Moment, 2 Photon 4G's, Samsung Nexus S 4G.