What Do the Lights on Your Modem/Router Mean?
Our experts will help you read your modem lights like a pro and fix your modem/router woes.
Whether you use a separate modem and router or a modem/router combo, you’ve got a lot of flashing and solid green lights on your internet devices. We’ll help you identify each light and troubleshoot common problems so your devices can have a strong internet connection.
Below are some of the most common lights you’ll run into on your modem, router, or combined modem/router device. We listed the lights in the general order that you might find them arranged on your device.
If you can’t identify your lights because they aren’t labeled and don’t match our illustrations, we have some suggestions a little further down.
The power light indicates that your modem, router, or modem/router has a reliable power source. Although it may flash or turn yellow when your device is downloading and installing routine upgrades, this light should normally stay solid green.
What does a red or black power light mean?
If your power light is red or not on, your device doesn’t have enough power to run. Make sure that you’ve securely plugged your power cord into your device and wall outlet. If you’re still having troubles, the outlet you’re using may be faulty; try plugging your device into another outlet.
Modems and modem/routers have a downstream indicator, which is sometimes labeled “DS.” Some devices also combine the downstream and upstream indicators into one light. Either way, the downstream indicator shows that you’ve got a connection with your local internet provider.
After your modem power light turns green, your downstream indicator will flash green until your modem detects a signal from your internet provider. Then it will turn solid green.
Why won’t my downstream indicator stop blinking?
If your downstream indicator keeps blinking, it’s because your modem can’t detect any signal from your internet provider. Check to make sure you’ve connected your modem to the internet outlet in your wall—your internet provider may have either a DSL or coaxial cable connection.
If your cables are secure, your local internet connection may be down, or there may be problems with your internet service account. Contact your internet provider for more information.