Technician helping fix Tuya random shutdowns and Smart Life issues

Steve H.

Expert ★★★★★ 27,853 satisfied customers

Specialities: Smart TV network setup after router changes, Wi-Fi password/SSID mismatches, 2.4 GHz vs 5 GHz compatibility, WPA2/WPA3 security modes.

New router, old TV: common reasons it won’t join the network and what to check first

Technician avatar Technician
Router changes can be surprisingly stressful because the TV is the one device that feels “stuck.” Let’s keep this safe and simple — no factory resets unless we truly need them.

When a smart TV won’t join Wi-Fi after a new router, it’s usually one of these:
• The TV is trying to join the wrong band (2.4 vs 5 GHz).
• The router’s security mode changed (WPA3-only can trip up older TVs).
• The TV saved old network details and won’t “let go.”
• The TV connects but can’t get an IP address or internet (“connected, no internet”).

First: what changed — a brand-new router, a replacement from your internet provider, or did you just rename the Wi-Fi?
Customer
New router from my provider. Phones work fine, laptop works, but the TV won’t connect. It keeps asking for the password and then fails.
Technician avatar Technician
Thank you — that “password loop” narrows it down. Let’s start with the safest checks first.

Two quick questions:
• Does the TV show your Wi-Fi name in the list and try to join it, or does it say “no networks found”?
• Do you see two Wi-Fi names (one with “5G” or “5GHz”), or only one name?
Customer
It sees the Wi-Fi name and tries to join. I only see one network name. I’m not sure about 2.4 or 5.
Technician avatar Technician
One shared name often means the router is “steering” devices between 2.4 and 5. Some TVs don’t handle that well, especially right after a router swap.

I don’t want you changing lots of router settings at once. A safer approach is to check what the TV already saved.

On the TV, do you see an option like Saved networks, Forget network, or Reset network (wording varies by brand)?
Customer
I see something like “Saved Wi-Fi” and “Reset Network.” I’m nervous to press reset. Will it mess up everything?
Technician avatar Technician
That’s a very reasonable concern. “Reset network” on a TV usually affects only its network settings (Wi-Fi details), not your apps, accounts, or picture settings — but we can still be cautious.

Trust moment: I don’t want you to do anything that could make it worse. So we’ll do the gentler option first.

If there is a Forget option for the old Wi-Fi entry, that’s safer than a broader reset. If you’re not sure, tell me the TV brand (Samsung, LG, Sony, Roku, Android TV) and what the menu calls it.
Customer
It’s Samsung. I can “Forget” the network. Should I do that and re-enter the password?
Technician avatar Technician
“Forget” is a good, low-risk step. Before you type the password again, one quick check that catches many router-change problems:

• Make sure you’re entering the Wi-Fi password, not the provider account password.
• Watch for easy mix-ups: letter “O” vs zero “0”, and capital letters.

After you try once: does it fail immediately, or does it spin for a while and then fail?
Customer
It spins for a bit, then says it can’t connect. The password is correct — I used it on my phone.
Technician avatar Technician
Good — that suggests it’s not a typing issue. Next, we separate two similar-looking problems:

Problem A: TV can’t join the Wi-Fi at all.
Problem B: TV joins Wi-Fi but says “no internet” or apps won’t load.

When it fails, do you see any message like “Connected, no Internet,” or does it simply refuse to connect?
Customer
It refuses to connect. I don’t get the “no internet” message. Another detail: the new router is right next to the TV now.
Technician avatar Technician
If it’s close to the router, weak signal isn’t the issue — helpful.

This is common after a router swap because of security mode and band steering. We can check this without changing a dozen things.

On many provider routers, there’s a setting for Wi-Fi security: WPA2, WPA3, or WPA2/WPA3 mixed. Older TVs can struggle if it’s WPA3-only.

Are you comfortable looking at the router’s Wi-Fi security label in its settings (view-only), or do you prefer to avoid router menus?
Customer
I can look, but I don’t want to change anything and lose internet. It says WPA2/WPA3.
Technician avatar Technician
Perfect — you did the safe part already (just viewing). Mixed mode is usually compatible, but some routers still behave like “mostly WPA3,” depending on the model.

Another safe clue: does your router have an IoT network, 2.4 GHz only option, or a separate “Guest” Wi-Fi? Some TVs connect more reliably to a simple 2.4 GHz network name.

I’m not telling you to create one right now — just: do you see such an option exists?
Customer
I see something called “Guest Wi-Fi” and also “Smart Connect” is on. I don’t see IoT.
Technician avatar Technician
Good information. “Smart Connect” is the feature that blends bands and steers devices. TVs are a common device that doesn’t love it.

Trust moment: this is common after updates or new hardware, but we should rule out the simple risks first.

Before touching Smart Connect, I want to confirm something else that can block joining: is your Wi-Fi name (SSID) hidden, or does it broadcast normally (you can see it on phones)?
Customer
It broadcasts normally. Phones see it. The TV sees it too. It just won’t connect.
Technician avatar Technician
Understood. At this point, the safest diagnostic move is to see whether the TV can connect to any Wi-Fi at all. This tells us if it’s a router-compatibility issue or a TV-side network setting problem.

Safe test options (pick whichever is easiest):
• Use a phone hotspot briefly (no need to stream video, just test joining).
• Or try the guest Wi-Fi once (some guest networks are “simpler,” but not always).

If it can join a hotspot but not the router Wi-Fi, that strongly points to router settings (band steering/security). If it can’t join anything, we look at the TV network settings and a gentle network reset.
Customer
I tried a phone hotspot and the TV connected to that. So it’s something with the router.
Technician avatar Technician
That’s a very clear result — and it’s good news: the TV’s Wi-Fi hardware is working.

Now we focus on router compatibility without big changes. The top suspects are:
• Band steering (“Smart Connect”) confusing the TV during the join process.
• WPA3 behavior (even in mixed mode).
• A router feature that blocks older devices (some call it “protected management frames” or “PMF”).

If you only change one thing for a test, the safest is usually creating a separate 2.4 GHz Wi-Fi name temporarily (or turning off Smart Connect briefly) and trying the TV on that. If you’re not comfortable changing settings, note the router model and we can match the option names.
Customer
I can probably turn off Smart Connect for a moment. If I do that, will it kick everyone off?
Technician avatar Technician
It can cause a brief reconnect for some devices, yes. If anyone is in the middle of a call, it’s better to do it when the house is quiet.

If you want a “lower disruption” approach: some routers let you keep Smart Connect on but still create a dedicated 2.4 GHz guest network for older devices. That depends on the router, though.

Either way, the goal of the test is simple: can the TV join a 2.4 GHz network name without band steering? If yes, we’ve identified the cause and you can decide the least disruptive long-term setup.
Customer
That makes sense. One more thing: if it connects but apps say no internet, is that a different problem?
Technician avatar Technician
Yes — that’s the “second layer.” Joining Wi-Fi is step one; getting internet is step two.

If you ever see “connected but no internet,” the usual safe checks are:
• Confirm other devices can browse the web at the same moment (rules out an ISP hiccup).
• Check whether the TV got an IP address (the TV network status screen often shows it).
• Consider DNS differences after a router change (some routers assign a different DNS automatically).

But since your TV can’t join the router Wi-Fi right now, we’ll keep the focus on the join/compatibility side first.

Quick answer: the accepted fix

Accepted first fix when a smart TV won’t connect after a router change:

• Remove the saved Wi-Fi entry on the TV and try joining again with the correct password (this clears old router details).
• Confirm the router isn’t forcing compatibility problems (band steering / “Smart Connect”, WPA3-only behavior).
• Do one quick isolation test: connect the TV to a phone hotspot. If it connects there, the TV is fine and the router is the blocker.
• If your router allows it, test a simple 2.4 GHz network name (or temporarily disable band steering) to see if the TV joins reliably.
• Avoid repeated factory resets; use a TV network reset only if it can’t join any Wi-Fi at all.

Why this starts right after a new router

After a router swap, the Wi-Fi name might be the same, but the “rules” can change: security mode, band steering, and compatibility settings. A phone may connect without complaint, while a TV struggles during the join process. That’s why a quick hotspot test is so useful — it separates a router-setup issue from a TV problem without risky steps.

What to check first if the TV sees Wi-Fi but won’t join

Start with low-risk checks: forget the saved network on the TV, confirm you’re using the correct Wi-Fi password, and verify the router isn’t using WPA3-only or aggressive band steering. If the TV joins a hotspot but not the router, focus on router compatibility (2.4 GHz option, steering, and security mode). If it can’t join any network, then a TV-side network reset is the safer next step.

Smart TV won’t connect after a router change — quick troubleshooting tips

Most cases come down to saved network details, band steering, or Wi-Fi security mode.

Keep it simple: clear the saved Wi-Fi entry on the TV, confirm the password, and use a short hotspot test to isolate the cause. If the hotspot works, look at router settings that affect older devices (2.4 GHz option, “Smart Connect,” and WPA2/WPA3 compatibility). If the TV connects but apps still won’t load, the next layer is IP/DNS and “connected, no internet” checks.

Disclaimer: This information is AI-generated and intended for general guidance only. Avoid unsafe electrical work and do not share private account details. If you’re unsure about changing router settings, ask your ISP or router manufacturer for help.

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FAQ

Why did my Smart TV stop connecting right after I changed routers?

A new router can change security mode, band steering, or compatibility settings even if the Wi-Fi name looks the same. TVs are often more sensitive than phones during the join process. Clearing the saved network on the TV is a safe first step.

Did this happen because the router updated or switched to WPA3?

It can. Some TVs struggle with WPA3-only or certain mixed-mode setups, depending on the router. If your TV connects to a phone hotspot but not the router, security and steering settings become the main suspects.

Is this a TV problem, or is it my new router?

A quick hotspot test helps answer that safely. If the TV connects to the hotspot, its Wi-Fi hardware is likely fine and the router settings are blocking it. If it can’t connect to any network, the TV’s network settings may need a reset.

Can I check this safely at home without factory resetting the TV?

Yes. Forget the saved Wi-Fi network, confirm the password, and try the hotspot test. Only consider a TV network reset if it won’t join any Wi-Fi at all. Avoid repeated factory resets because they add stress without proving the cause.

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