Hadn't heard of anyone renting a Roku before (much less turning it in after paying rental fees), but...ok. If using same email/account as previous Roku device, try doing a manual System Update. Settings...System...System Update. This will update all channels to any linked Roku devices. If unsuccessful, then maybe the rented Roku got Factory Reset and lost the Channels linked to the account.
Truthfully, since you now own your old Roku, I think I would just Factory Reset it and use a completely new email address and set up new account and start anew. Don't know the circumstances of your rental agreement, but sounds sketchy to me at first glance. (again, not knowing circumstances).
Unless, of course, you mean you rented a place that had a Roku device there as part of your rental agreement. That I could see. If that is the case, the Channels should be under your Roku Account and "should" transfer to the new device, I would think.
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102
In your case, all seems legit, so you should be able to use your old account if you wish and should be able to retrieve your channels when linking the new Roku device to this account and using the manual System Update.
