This article will walk you through verifying your physical hardware, testing your cabling setup, and performing a clean network power cycle to restore your wired connectivity.
Follow these troubleshooting recommendations to identify and resolve the problem:
Before altering any digital settings, rule out a physical disconnect or hardware failure.
1. Check the light indicator
The router’s light behavior can tell you whether a wired connection has been detected.
The following article will show you what each LED behavior means:
2. Swap the ethernet cable
Unplug your current cable and try a known-good ethernet cable. Internal wire fractures are invisible to the naked eye but can completely cut the signal.
- Disconnect and reconnect the ethernet cable on both ends.
- Try a different ethernet cable that you know works.
- For best performance, use a Cat5e, Cat6, or higher ethernet cable.
If replacing the cable restores the connection, the original cable was likely faulty.
3. Test a different LAN port
Connect the same ethernet cable to a different LAN port on your Linksys router. If the device works on another LAN port, the original port may be damaged or malfunctioning.
If none of the LAN ports work, continue with the next steps.
4. Isolate the wall jacks
If you are using built-in wall jacks, note that they often terminate at a central, disconnected panel or media box elsewhere in your building. Try connecting your device directly to the router with a patch cable to rule out faulty in-wall wiring.
5. Restart the modem and router
If multiple devices cannot connect to the internet when plugged in, your routing hardware likely needs to be restarted. A clean restart can resolve temporary communication issues between your modem and router. Turn OFF the modem and router. Wait 30 seconds, turn ON the modem first, and allow its lights to stabilize. Finally, power on your Linksys router. This process clears the cache and forces DHCP to assign fresh local IP addresses. Once the router is ready, test your wired connection again.
6. Perform a loopback test
On your router, plug one end of a working ethernet cable into the suspected failing LAN port and the other end directly into the router's WAN/Internet port. If the corresponding lights do not instantly turn ON, the router's internal switch chip has likely failed.
| Symptom | Likely cause | Recommended Fix |
| No light on the computer port | Physical disconnection or disabled hardware | Check Device Manager, swap the ethernet cable, or check your motherboard’s BIOS settings |
| Lights ON, but there is no internet connection | IP address / DNS configuration conflict | Flush the DNS via Command Prompt and set IPv4 to automatic (DHCP) |
| Only wall ports don’t work | Disconnected central patching panel | Locate the central home media closet and connect the wall line to your router using a network switch |
1. Check for firmware updates
Keeping your Linksys router updated helps resolve known bugs and improves overall stability. Check whether a new firmware version is available for your router model and install it, if needed.
If you purchased your Linksys router, check whether a newer firmware version is available for your model and install it if needed.
Article reference: How to check if firmware Auto-Updates is turned ON
If your router is provided by your Internet Service Provider (ISP), contact them for assistance with the firmware updates. Many ISP-managed routers receive firmware updates directly from the provider or require the ISP to perform the update.
After the firmware has been updated, test the ethernet connection again.
2. Reset the Linksys router (optional)
If all ethernet ports remain unresponsive and the issue started after changing settings, consider resetting your router to its factory defaults.
IMPORTANT: Factory reset removes your custom network settings including WiFi name, password, and other configurations. You’ll need to set up your router again afterward.
After the reset, test the ethernet ports before restoring any custom settings.
If you’ve completed all the steps above and the ethernet ports are still not working, your router likely needs to be replaced.
Please contact Linksys Support (if you purchased the router yourself) or your ISP (if they provided the router) to check your warranty status and request a replacement.
