JB ATV2

Hey all I just picked up a used atv2

He said it was last using seasonpass 4.3, tethered JB

My question is since it wasnt JB here what do I have to do to be able to use it since its tethered?

Do I have to start over and re JB? if I restore is there a JB for the latest SW it will install?

I am new to the ATV thing so sorry for noob questions

 

4.3 is untethered model as seen here http://forum.firecore.com/topic/3418

 

Is it currently Jailbroken? If it is will it boot up?

It is currently JB I think he said he used season pass 4.3

When I plug into TV it tells me to hook to itunes which I know he said it was tethered…

But I dont have the ipsw so I figure I might have to total upgrade with season pass to version 5.0??