First find out what is dropping: the Wi-Fi signal, the router’s internet connection, or the router itself restarting. Connect a computer to the router by Ethernet, then, if needed, test it directly with the modem. Those checks help distinguish a wireless problem from a router, modem, or ISP problem—and keep you from repeatedly rebooting the wrong device.
Identify what disconnects
When the next outage happens, note what you see. The clues help choose the right test, but none proves a component has failed on its own.
- Only wireless devices lose access: Check whether the Wi-Fi network name disappears or devices stay connected to Wi-Fi but report no internet.
- Wired and wireless devices both lose internet: Investigate the router’s connection to the modem and the modem or ISP service.
- Only one device drops: Compare it with other devices before changing router settings. If other devices remain online, focus on that device’s Wi-Fi adapter or driver.
- The router’s lights go out or cycle: The router may be restarting or losing power, rather than merely losing its internet connection.
Test the connection by Ethernet
Connect a computer to a LAN port on the router with an Ethernet cable and use it while wireless devices are having trouble. If internet access stays stable over Ethernet, the problem is more likely Wi-Fi-specific. If wired and wireless connections both fail, continue by checking the router’s WAN connection and the upstream modem or ISP service. Microsoft’s Windows guidance also recommends checking the connection to the router and using direct Ethernet to the modem as an isolation test: Fix Wi-Fi connection issues in Windows.
Check the modem and ISP connection
If the router’s wired and wireless connections both drop, bypass the router if your equipment and ISP allow it: disconnect the router and connect a computer to the modem by Ethernet. If the connection remains unstable directly through the modem, the likely fault is the modem or ISP service, not the router. TP-Link advises contacting the ISP for modem or service-line troubleshooting in that case: TP-Link Router Keeps Disconnecting? Fix Unstable Wi-Fi.
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Reconnect the router after the test. Follow your ISP’s instructions for a modem/router combination device; a separate-router test may not apply to that setup.
Inspect the cable between modem and router
Check that the Ethernet cable from the modem is firmly seated in the router’s WAN port, not a LAN port, and inspect it for visible damage. If it is loose or damaged, test with a known-good Ethernet cable of a suitable length and connector. Borrow one if possible before buying anything. A WAN cable problem can disrupt both wired and wireless internet through the router, but it does not explain Wi-Fi-only drops when Ethernet through the router stays reliable. See TP-Link’s unstable-connection troubleshooting guide.
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If only Wi-Fi disconnects
When Ethernet remains stable, focus on the wireless link rather than replacing the router or changing ISP settings.
Improve placement
- Move the router to an open, elevated location.
- Reduce obstructions between the router and affected devices.
- Keep it away from nearby appliances or other sources of wireless interference where practical.
Test a different band or channel
If your router supports both bands and the signal is strong enough, try connecting an affected device to 5 GHz. In a congested area, trying another Wi-Fi channel may help. Channel options and channel-width controls vary by model and environment; consult your router’s manual rather than applying a setting as if it were universal. TP-Link lists 20 MHz channel width as one troubleshooting option on supported products, but narrower widths can affect performance and are not a guaranteed fix: TP-Link’s guide.
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Check whether one client is affected
If other devices remain connected, troubleshoot the affected device’s Wi-Fi adapter or driver using the operating system’s built-in tools and the adapter maker’s official guidance. If a router’s Smart Connect feature steers devices between bands, disabling it temporarily can be a diagnostic test where that feature is available; restore it if the change does not help. ASUS also provides model-specific wireless troubleshooting guidance: WiFi signal is often disconnected.
Restart the modem and router in order
A coordinated restart can restore service, but it does not identify why the connection failed. Microsoft’s Windows Wi-Fi instructions describe this sequence for separate modem and router units:
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- Unplug power from both the modem and router.
- Wait about 30 seconds.
- Restore power to the modem first and wait for its lights to settle.
- Restore power to the router and wait for it to finish starting.
- Reconnect devices and check whether the connection is stable.
Connected devices will lose internet during the restart. For a combination modem/router or equipment with a backup battery, use the ISP’s instructions rather than assuming this sequence applies. If disconnections recur, use the Ethernet and direct-modem tests instead of repeating restarts without narrowing down the fault. Microsoft’s Wi-Fi troubleshooting guide
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.If the router keeps rebooting
If the router’s lights cycle or it repeatedly starts up again, check its power and firmware as well as its internet connection.
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- Install current firmware using the router maker’s official, model-specific instructions.
- Try a different wall outlet.
- Use the power adapter supplied with the router. Do not substitute a generic adapter; voltage, polarity, connector, and current requirements are model-specific.
- NETGEAR also lists a UPS as an option to consider. Consult the router’s documentation before changing power equipment.
A factory reset is a later diagnostic step, not a routine first fix: it erases custom settings. Before resetting, make sure you can restore any required ISP settings and your Wi-Fi name and password. Follow your model’s manual for the reset procedure. NETGEAR’s guidance covers firmware, power, UPS, and reset considerations: My router keeps rebooting itself, what can I do?
Quick Recap
When to contact support
- Contact your ISP if a direct connection to the modem is unstable, or if the ISP’s equipment or service needs checking.
- Contact the router maker if the modem connection is stable but the router still drops wired and wireless connections after you check the WAN cable and firmware.
- Continue device-specific troubleshooting if only one computer or phone disconnects while other devices remain online.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
