First check whether the device loses Wi-Fi, the internet connection fails, or the video simply buffers. Those are different problems. A fast fibre plan does not guarantee a strong wireless connection between your router and TV.
What exactly stops working?
| What you see | Likely area to investigate |
|---|---|
| The Wi-Fi network disconnects or disappears | Signal, interference, router/device stability and wireless compatibility. |
| Wi-Fi stays connected but several devices lose internet | The router’s broadband connection or provider/service problem. |
| Other devices work; one streaming box fails | That device’s Wi-Fi, software, power or app. |
| The picture buffers but internet still works | Available speed, competing traffic, service or playback quality. |
| One streaming service fails | Its status, app, account and supported device. |
Run a simple comparison
- Try another app or website on the same device.
- Check a second device while the fault is happening.
- If possible, test the streamer over Ethernet.
- Repeat near the router without changing several settings at once.
- Note the time and whether the Wi-Fi indicator actually disconnects.
If Ethernet works and Wi-Fi does not, focus on the wireless link. If both fail across several devices, changing the TV’s Wi-Fi band may not fix the actual problem.
How much speed does streaming need?
Use the service’s own requirement for the picture quality you want. For example, Netflix currently recommends 3 Mbps for 720p, 5 Mbps for 1080p and 15 Mbps for 4K. There is no universal rule that every 4K service requires exactly 25 Mbps.
Measure at the streaming device if it offers a connection test. A speed test from a wired PC or the router alone does not measure the TV’s Wi-Fi link. Leave room for other people, cloud backups and downloads using the connection.
Try the band that works at your location
5 GHz can offer more capacity near the router, while distance and walls can make another supported band work better. Compare the actual result rather than assuming 5 GHz always wins. Busy 2.4 GHz surroundings and nearby equipment can also affect the connection.
Check repeater or mesh placement too. A strong-looking connection to an extender does not prove that the extender has a strong link back to the router.
Make changes that match the test
- Pause a large download or backup for a comparison.
- Improve router/extender placement or use Ethernet where practical.
- Restart the affected device and check supported app, router and device updates.
- Check the streaming service’s status if only that service fails.
- Try a lower video-quality setting to see whether the problem tracks bandwidth demand.
Do not buy a faster plan before checking whether the local Wi-Fi link is the limit. Likewise, installing antivirus is not a guarantee that a TV or streaming box will stop disconnecting.
For a missing network, see Wi-Fi compatibility checks. For speed comparisons, see testing download and upload results.
Information checked October 13, 2026, using the guides linked above.