Samsung's Wi-Fi guidance is to start simple. Unplug the TV and the router for a minute and plug them back in, since that alone solves many cases, and make sure the password is right, which Samsung calls the most common reason for failure. Open Settings, General, Network, Open Network Settings, choose Wireless, pick your network and re-enter the password; the TV's Network Status test shows whether the failure is the router or the internet.
The checks in more detail
Samsung strongly recommends an Ethernet cable where possible for stable streaming. If the TV does not see the network, check that the router is on the 2.4 GHz or 5 GHz band the TV supports, move the router closer or reduce obstacles, and check the router's MAC filtering and DHCP settings. Samsung's IP Settings can be changed to manual with DNS 8.8.8.8 if names fail. Turn off any VPN on the router.
If Wi-Fi drops after a router change, forget the network on the TV and reconnect. Reset the network under Settings, General, Reset Network Settings, or Settings, General, Network, Reset Network. Update the TV software, since Wi-Fi fixes ship in updates, and update the router firmware. Older models can struggle with WPA3-only or Wi-Fi 6E-only networks, so keep a compatible network. If the network works for other devices but not the TV, contact Samsung.
Run a speed test from a phone standing next to the TV, since a phone shows whether the room's signal is the problem. If the phone is fast and the TV is slow, the TV's own antenna or settings are the cause, and Ethernet is the reliable fix. Reserve the TV's address on the router once it connects, so that a router restart does not hand it a new address and break casting for other devices.
Differential
Likely causes of “Samsung TV line will not connect to Wi-Fi or keeps disconnecting”, and how to tell them apart
- 1
A wrong password
What separates it The TV cannot connect because the wifi password was entered wrongly
How to confirm Re-enter the password carefully, checking capital letters and symbols
- 2
A stale connection
What separates it The TV drops off the network after a router change because of a stale connection
How to confirm Forget the network on the TV, and then connect again from the start
- 3
A weak signal
What separates it Video buffers and the connection drops because the wifi signal at the TV is weak
How to confirm Move the router closer, or connect the TV with an Ethernet cable
- 4
Router settings
What separates it The TV will not connect because a router setting blocks it
How to confirm Check the router's MAC filter and DHCP settings, and allow the TV to join
- 5
An old TV or router firmware
What separates it The connection drops at random because the TV or the router runs old firmware
How to confirm Update the software on the TV and the firmware on the router
Before you touch a setting
Record this first — changing settings destroys the evidence
- The error message that the TV shows
- Whether other devices can connect to the same network
Try in this order
0 of 7 completedRestart the TV and router
ReversibleRestart the TV and the router, by unplugging them for a minute, and then plug them in.
Re-enter the password
ReversibleRe-enter the password, by opening Network Settings and choosing your wifi network again, and then test again to see whether it helped.
Run the network status test
ReversibleRun the network status test, which tells you whether the router or the internet is at fault.
Use Ethernet
ReversibleUse Ethernet if possible, since a cable is more stable than wifi for streaming video.
Change DNS
ReversibleChange the DNS to 8.8.8.8 if names fail, in the TV's network settings, and then test again to see whether it helped.
Reset network settings
ReversibleReset the network settings on the TV, and then reconnect it to your wifi, and then test again to see whether it helped.
Update the software
ReversibleUpdate the software on the TV, and then retest the connection to the network, and then test again to see whether it helped.
Model-specific
What is true of this model and not of its siblings
- Wi-Fi standard
- Recent models support Wi-Fi 6E or 6; older ones are Wi-Fi 5.
- Ethernet
- Premium models have an Ethernet port on the box or the TV.
- Other models this page answers
- These steps also fit models CU8000, Q80C, Q90T, QN900D, QN90B, QN90C, QN95D, S90C, S90D, S95C, S95D, LS03D.
Stop boundary
When this stops being a self-service repair
- !If the TV will not connect to a network that other devices use, reset network settings and contact Samsung
- !If drops persist on Ethernet too, check the internet line
- !If the router blocks the TV, check its settings
Evidence ledger
Sources behind this answer
Wi-Fi connection fixes.
Wireless network troubleshooting.
Automatic, internet and USB updates.
App fixes.
The company and its products.
Exact questions
Common questions
Why will my Samsung TV not join wifi?+
Usually the password or a stale connection.
Where is Network Settings?+
You find Network Settings under Settings, then General, and then Network.
What is the network status test?+
It shows whether the router or internet is at fault.
Can DNS help?+
A manual DNS like 8.8.8.8 can.
Can the band matter?+
Yes, the band can matter, since a 5 GHz network is faster but reaches less far.