Can I take my computer ont the fight fyi not a laptop and not going to use it on flight.

Yes you can and no you do not need to power device on regardless if your using it or not, it will be scanned thru TSA just like carry on... Very simple process

You should be fine but I'd contact your airline to make sure. You won't have to power it on but you'll have to put it on the belt to be x-rayed.

You should contact your airline for that information.