There are/were several models of Premieres and Expresses. It's possible that your new Express is better than your old Premiere, so you may want to hang onto it. What's the model number of the Express (written on it somewhere) and the model number of the Premiere if you remember?
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I would just like to say, ROKU finally shipped me a correct unit, I'm happy with it and while it took way too long to resolve the issue, I'm glad ROKU got me a replacement unit. I wish to thank all those who replied to me original posting and provided help in resolving my problem, thanks.