Quick answer
On most routers, the Power light stays solid, the Internet light is solid or flickers, and the Wi-Fi and LAN lights flicker when devices send data. Flickering on activity lights is normal. A light that blinks slowly for a long time, or shows amber or red, is more likely to indicate a problem. Models differ, so treat this as a general guide.
Normal behavior, light by light
| Light | Usually normal | Worth a closer look |
|---|---|---|
| Power | Solid | Off, or blinking for a long time |
| Internet / WAN | Solid, or flickering with traffic | Off, amber, red, or slow blinking that does not settle |
| Wi-Fi (2.4 / 5 GHz) | Solid or flickering | Off when Wi-Fi should be on |
| LAN / Ethernet | Lit when a device is plugged in; flickers with traffic | Off for a port with a connected device |
| WPS | Off, or blinking briefly during pairing | Blinking constantly |
| DSL / PON | Solid once linked | Blinking for a long time or off |
Why a light that does not blink is not always a problem
On some models the internet light stays solid when the connection is up and only flickers with traffic on others. A solid light is generally a good sign. Some routers also allow the lights to be dimmed or turned off in settings or with a button, so an all-dark router is not always a fault. Blinking is normal during startup, which can take a few minutes.
Signs a light is not healthy
- Amber or red on the power or internet light
- A slow, steady blink that continues well after startup
- A LAN light that is off even though a cable is plugged in
- Lights that cycle on and off repeatedly (the router may be restarting)
For more detail on colors, see what the lights on your router mean.
If the internet light is off or not flashing
- Check the cable between the modem and the router’s WAN or Internet port. Reseat both ends.
- Confirm the modem itself has a working connection. Check its lights, or connect a computer directly to the modem if your setup allows.
- Try a different Ethernet cable, or a different port if your setup has one.
- Restart the modem first, then the router.
- If it still fails, check for an outage and contact your provider. If the modem works but the router’s WAN port does not, the router may need a reset or replacing.
Router makers’ support pages, such as TP-Link’s guidance for a dead Internet light, broadly follow this order: physical connection, modem test, WAN port test, then a reset.
Extenders and provider modems
Wi-Fi extenders commonly use a light to show signal quality or link status to the main router, and blinking often means the extender is connecting or has lost its link. Check the extender’s manual for its meaning. For provider modems (Spectrum and similar), the provider’s help page for your exact model is the most reliable decoder.
Orange lights
An orange or amber light usually signals a warning or a stage in startup, such as a link that has not completed. Give the router a few minutes after power-on. If it remains orange, check cables and restart, then contact your provider. See why the internet light keeps blinking for related steps.