Got it — a streaming device that won’t connect after moving to a new Wi-Fi can feel sudden, but it’s usually a small compatibility detail.

Let’s start with the safest checks first. I don’t want you changing a bunch of router settings without knowing what matters.

Quick questions so we take the shortest path:
• What device is it (Roku, Fire TV, Chromecast, Apple TV, or a smart TV stick/box)?
• What changed: new router, new internet provider, or a new Wi-Fi name/password?
• What does the device show — “incorrect password,” “can’t find network,” “connected but no internet,” or just spinning?
• Do other devices (phone/laptop) connect to this same Wi-Fi right now?

Thank you — “sees the network but won’t join” narrows it down a lot.

On a new router, the most common causes are:
• The Roku is trying to connect on a band it doesn’t like (some models behave better on 2.4 GHz).
• The router is set to WPA3-only (some devices won’t join WPA3-only even if phones can).
• The password is correct, but the router blocks the device (MAC filtering, access control, or guest isolation).

First safe check: is your Wi-Fi one combined name for 2.4/5 GHz, or do you see two names (one for each)?

You’re not alone — that setting is confusing, and it can matter for older streaming boxes.

“Smart Connect” means the router decides whether a device goes on 2.4 or 5 GHz. Phones usually handle that well. Some streaming devices don’t.

Trust moment: we won’t factory reset the Roku yet. We’ll try checks that are easy to undo.

Safe test idea: do you have an option in the router to temporarily separate the Wi-Fi names (for example adding “_2G” to 2.4 GHz)? Even if it’s just for a short test, it helps confirm whether band selection is the blocker.

Good catch. WPA3 can be fine, but WPA3-only is where older devices often fail to join.

Two safe, reversible checks (you can switch back later):
• If the router offers it, choose WPA2/WPA3 mixed instead of WPA3-only.
• If you can, temporarily split the Wi-Fi names so you can try the Roku on 2.4 GHz directly.

Before changing anything, one simple question: does the Roku error say “incorrect password,” or just “unable to connect to wireless network”?

That message usually points to “can’t complete the join,” not a typing mistake.

Another safe check that helps diagnose: are you connecting the Roku to your main home Wi-Fi, or a guest network? Guest Wi-Fi often blocks device-to-device traffic, and some streaming setups don’t like it.

Also, do you use any “access control” features on the router (like blocking new devices, parental controls, or a list of allowed devices)?

That sounds fine so far.

Next, a “no-risk” device-side check: many streaming devices keep a saved Wi-Fi profile that can get stuck after a network change. If the device has an option like “Forget network” or “Reset network connection,” it clears only Wi-Fi details (not your whole device).

Trust moment: I’m not asking you to wipe apps or sign out. This is just the network profile.

Before you do that, one more detail: is the Wi-Fi password simple letters/numbers, or does it include spaces, emoji, or special characters?

It can — not always, but it’s a known “new network” snag. A phone keyboard may auto-correct spacing in a way that the Roku remote entry doesn’t match exactly.

Safe way to test without permanently changing your Wi-Fi: if your router supports it, create a temporary second Wi-Fi name with a simple password just for testing (or temporarily simplify the main password, then switch it back).

Also, if you switch to WPA2/WPA3 mixed and try the Roku on a 2.4 GHz-only name, that gives a very clear signal about what’s blocking it.

That’s an important change: it now joins Wi-Fi, so the “can’t connect” part is largely solved. “No internet” after joining is usually a router assignment issue (DHCP) or a DNS/protection feature on the router.

Safe checks that don’t break anything:
• Reboot order: modem/ISP box → router → streaming device (wait a minute between each).
• In the router, look for something like “Block unknown devices,” “HomeShield/Protection,” or strict parental controls that could block traffic for new devices.
• If the router has both IPv6 and IPv4 settings, note whether IPv6 is enabled (some devices are picky on some networks).

When it says “No internet,” do other devices still have internet at that exact moment?

That lines up perfectly with the symptoms: the device joins Wi-Fi, but the router blocks it from reaching the internet until it’s approved.

Trust moment: make one change at a time, then watch it for 10–15 minutes. That way you’ll know what helped.

Safe diagnostic approach:
• If there’s an “approve device” list, check whether the Roku is waiting there.
• If the router can “pause” the security scan temporarily, test whether the “No internet” message stops during that time.
• Keep using the 2.4 GHz-only name for now while you stabilize things, then you can decide whether to re-enable Smart Connect later.

If you tell me the exact wording of that security feature, I can help you identify whether it’s an approval list, a quarantine mode, or a parental-control block.