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Strong Wi-Fi bars mean your device has a good wireless link to the router; they do not prove that the router, modem, or internet provider is online. To find the break, first check whether other devices on the same Wi-Fi can get online. If they can, troubleshoot the affected device. If none can, check the router-to-modem connection and provider service.
What good Wi-Fi signal does—and does not—tell you
Your Wi-Fi connection has two distinct parts: the local wireless link between your device and the router, and the router’s connection through the modem and internet provider to the wider internet. Signal bars describe the first link, not the second. A device can therefore show strong Wi-Fi while the router has lost its upstream connection. Microsoft describes the Windows state as a PC connected to its local network but not the internet; it calls this “limited connectivity.” Microsoft’s Windows troubleshooting guide and TP-Link’s overview explain this distinction.
Start by checking whether one device or all devices are affected
Try another phone, computer, or tablet on the same Wi-Fi. This quick comparison points to the right troubleshooting branch before you change network settings.
| What you find | Where to investigate |
|---|---|
| Other devices work on the same Wi-Fi | The device that cannot connect: its IP, DNS, proxy, or other network settings. |
| No devices can reach the internet | The router, modem, connection between them, or provider service. |
Also try more than one website or app. If only one service fails while other sites load, the issue may be with that service or an app-specific setting rather than your overall internet connection.
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If only one device has no internet
Reconnect before changing settings
- Turn Wi-Fi off and back on, then reconnect to your network.
- If that does not help, forget the network and join it again using its password.
- Restart the device and test more than one website.
On phones and non-Windows computers, the exact menu names vary by platform and version. Use the device maker’s current instructions before resetting all network settings.
Check Windows IP, DNS, and proxy settings
These steps apply to Windows 10 and Windows 11. Open Command Prompt for the command-line checks; use an administrator account where Windows requires elevated permissions.
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- Look for an IP address beginning with 169.254. Microsoft says a 169.254.x.x address can indicate Windows did not obtain an address from the router. On a typical home network configured for automatic addressing, check that DHCP is enabled.
- Check DNS. If the device has an address but cannot open sites by name, check whether a DNS server is configured and reachable. A DNS change may be a troubleshooting option, but it is not a guaranteed fix or a default setting to change.
- Check for an unintended manual proxy. A proxy setting can affect internet access on one device even when Wi-Fi is connected.
Microsoft’s suggested Command Prompt sequence includes these commands, in order:
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If reconnecting and those commands do not help, Microsoft’s broader network-reset sequence includes netsh winsock reset and netsh int ip reset. Treat these as later steps rather than the first response.
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If every device is offline
Check provider service and the router-to-modem link
Using cellular data, check your internet provider’s service-status page or contact the provider. An outage or account/service issue will not be fixed by changing Wi-Fi settings. Outage information is local and time-sensitive, so check your own provider’s current status.
Make sure the modem is powered and the Ethernet cable from the modem is firmly connected to the router’s WAN or Internet port. Router lights and status-page labels vary by model, so a red, orange, or blinking light does not have one universal meaning. D-Link’s support guidance and TP-Link’s router troubleshooting guide cover these upstream checks.
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Restart the modem and router in the right order
Follow your equipment manual or provider’s restart instructions, since timing differs by device. Microsoft’s general guidance is to disconnect both devices, wait about 30 seconds, power the modem back on and let it settle, then power on the router and wait for it to start. If you have a combined modem/router, restart that single device.
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Read the router’s internet status if available
On TP-Link routers, an Internet IP of 0.0.0.0 means the router has not received a valid address from the modem. Check the WAN cable and, if practical, test the modem directly. If the router shows a valid Internet IP but access still fails, DNS or another configuration issue may be involved. These labels and menus are specific to the router model; consult its documentation rather than assuming another brand uses the same interface.
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Use a direct modem test to separate router trouble from provider trouble
If you have a compatible computer and Ethernet ports, you can connect it directly to the modem to check whether the modem’s internet path works without the router. Disconnect the router for the test and reconnect equipment as directed by your provider or device manuals. An Ethernet cable can help if you do not already have one.
- The computer gets online directly, but router Wi-Fi does not: the router or the connection through it is a stronger suspect.
- The computer cannot get online directly either: restart the modem according to its instructions. If service remains unavailable, contact your provider.
A direct test may depend on provider-specific requirements, such as service tied to a device address or a required connection type. Do not clone a MAC address or change WAN credentials unless your provider or equipment documentation specifically tells you to.
When to contact support
Contact your internet provider if its status page reports an outage, a direct modem test still cannot reach the internet after a restart, or the modem is not receiving service. For a router status or configuration problem after these checks, contact the router maker’s support.
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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteTo make the support conversation useful, note whether one device or all devices fail, whether a direct wired test worked, your modem and router models, any WAN or Internet IP status shown, and the steps you have already tried. TP-Link also advises users contacting support to provide the router Internet IP, modem model or type, and troubleshooting completed.
Possible causes, by part of the connection
- Provider outage or service issue: Wi-Fi can remain strong while every device loses internet access.
- Router-to-modem connection: a loose cable, incorrect port, or missing WAN link can leave the wireless network available without internet.
- Router or modem state/configuration: a restart may restore a stale connection; WAN status can help narrow down the issue.
- IP or DHCP problem: a device may join Wi-Fi but fail to get usable local network settings.
- DNS problem: the connection may be present while site names fail to resolve.
- Device settings or software: a manual proxy or other local configuration can affect just one device.
- Address conflict or access control: duplicate IP addresses or administrator/parental controls can block access in some network setups.
Wi-Fi bars alone cannot identify which cause applies. The device-versus-network check and, when practical, the direct modem test help locate the failing link without assuming that replacement equipment is needed. For more diagnosis-oriented troubleshooting paths, see TP-Link’s Wi-Fi diagnosis guide.
Quick Recap
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