Do NESN and ESPN not work on the Roku all the time or just some of the time?
Do NESN and ESPN work on other devices when connected to the home network (computer, phone, tablet)?
Do NESN and ESPN show up in the channel listings and you get an error when trying to tune or they don't show up in the listings at all, no matter how it's filtered?
From the Spectrum website:
With the Spectrum TV App, access your full TV
lineup in-home and up to 30,000 On Demand TV
shows and movies in your home on your mobile
and connected devices, including phone, tablet
and Roku, Xbox One and Samsung Smart TV
NESN and ESPN are part of my channel line up, yet they don't show up in the app.
I think the first requirement is that your cable TV subscription must include to a tier that includes NESN. You indicated it is 34, so I presume that's where you 'tune' your HD set top box to watch NESN on your primary viewing display. If yes, move forwrd to step 2. If NO, you need to upgrade your programming package.