The short answer
Forget the network on the television and rejoin it by typing the password, since updates frequently invalidate the stored profile. If it still fails, set the router to WPA2 or mixed mode rather than WPA3 only, use 20MHz channel width on 2.4GHz, and reserve a fixed address for the TV.
A television that connected fine last week and refuses today, immediately after an update, is usually not broken. Updates replace the network stack, reset stored credentials and occasionally change which security modes the set will accept. The fixes follow from that.
Step 1: the basics, in order
Forget the network and rejoin
On the television, remove the saved network entirely, then join again by typing the password manually rather than accepting a stored one.
Power cycle properly
Unplug the television from the mains for a full minute. Standby is not enough, and the network stack only reinitialises on a true restart.
Restart the router
Which clears its client table and any stale entry for the television.
Check other devices still work
If everything else is fine, the problem is the television. If several devices are struggling, it is the router.
Check the password
Retype it carefully. Long passwords with special characters are frequently mistyped on a remote control keyboard.
Step 2: router settings that break older televisions
- WPA3-only security. Older sets support WPA2 and fail on WPA3, sometimes connecting briefly and then dropping. Set the router to WPA2/WPA3 mixed mode, or WPA2 only as a test.
- 40MHz channel width on 2.4GHz. Simple devices handle 20MHz far better. Set it to 20MHz.
- Band steering. One network name for both bands causes some televisions to fail association. Splitting the bands and joining the TV to one is a definitive test.
- A hidden network name, which many televisions handle poorly. Un-hide it, since hiding provides no meaningful security.
- A full DHCP pool, which prevents the television getting an address. The symptom is a set that authenticates and then reports no internet.
- MAC filtering, where the television’s address may have changed or the filter list is out of date.
Create a temporary second network on the router with a short simple name and password, WPA2, 2.4GHz only, and try joining that. If the television connects, you have proved the set works and can then change one setting at a time on the main network until you find the one it dislikes.
Step 3: television-side fixes
- Reset the network settings on the television, which most sets offer separately from a full factory reset.
- Check the date and time are correct, since a wrong clock breaks secure connections and produces failures that look like network problems.
- Disable any eco or power saving network option, which on some sets disconnects Wi-Fi in standby and reconnects unreliably.
- Check for a further firmware update, since a broken release is often followed quickly by a corrective one. Where the television cannot get online, updates can usually be installed from a USB stick using a file from the manufacturer’s site.
- Perform a factory reset as a last resort, which clears every stored setting including the network profile. Note your picture settings first.
Step 4: the practical alternative
A television never moves, which makes it the best candidate in the house for a cable. Plugging in Ethernet removes every wireless variable at once, and on a set with an ongoing Wi-Fi problem it is a permanent answer rather than a workaround.
If a cable cannot reach, a powerline adapter or a mesh node with an Ethernet port beside the television achieves the same. And if the television’s own apps are the only reason it needs the network, a streaming stick with better wireless hardware sidesteps the problem entirely and usually performs better anyway.
Before a factory reset, note that it also restores the default privacy consents on many televisions, re-enabling the viewing data collection you may have turned off. Go back through the privacy settings afterwards.
If the update is the underlying problem
Search your television’s exact model number with the words Wi-Fi and update. Model-specific regressions are common, widely discussed, and often acknowledged by the manufacturer with a corrective release. Knowing that a fix is coming changes what you do in the meantime, which is usually to wire it temporarily rather than to rebuild your entire network around one device.
Reporting it to the manufacturer is worth the few minutes, because televisions receive firmware attention roughly in proportion to how many people complain.
Why did my TV stop connecting after an update?
Updates replace the network stack and can invalidate the stored network profile or change which security modes the set accepts. Forgetting and rejoining the network resolves most cases.
Could WPA3 be the problem?
Yes. Older televisions support WPA2 and fail on WPA3-only networks, sometimes intermittently. Setting the router to mixed mode is a quick and safe test.
The TV says connected but there is no internet. Why?
It has authenticated but not received an address, or DNS is failing. Check the router’s DHCP pool is not full, and try setting a manual DNS on the television.
Should I factory reset the TV?
Only after trying a network settings reset, which is less disruptive. A factory reset also restores default privacy consents, which you will want to review again afterwards.
Is Ethernet worth running to the TV?
For a device that never moves and keeps having wireless problems, yes. It removes every wireless variable permanently and is the most reliable fix available.
The order
Forget and rejoin the network, then power cycle the television from the mains. Set the router to WPA2 mixed mode with 20MHz channel width and un-hide the network. Reserve a fixed address and check the DHCP pool. Reset the television’s network settings, and check its clock. Then wire it, because a television is the easiest device in the house to take off Wi-Fi entirely.
