Internet & modems

Modem shows a blinking orange or red light

An orange or red light on a modem almost always indicates the modem isn't successfully connecting to the provider's network, which is usually resolved with a restart or points to an outage or line issue if it persists.

Difficulty
Easy
Time
10–20 minutes
DIY cost
$0
Pro cost
$0–$100

Symptoms

  • A specific light (often labeled internet, online, or DS/US) is orange, red, or blinking abnormally
  • Internet doesn't work while the light is in this state
  • Light was previously green/white and changed color without any known cause
  • Restarting the modem doesn't change the light's color

Likely causes

  • CommonTemporary loss of sync with the provider's networkModems periodically need to resynchronize, and a brief interruption can leave the light in a warning color until it reconnects.
  • CommonISP outage or maintenance in the areaAn outage upstream from your home shows on the modem exactly the same way as a local equipment problem.
  • PossibleLoose or damaged cable connecting the modem to the wallA poor physical connection prevents the modem from getting a clean signal to sync properly.
  • Less commonModem hardware failureAfter ruling out restarts, cables, and outages, an aging modem can fail internally.

What to do

  1. Note exactly which light is orange or red and consult the modem's manual or a quick search of its model number and light color to understand what stage of connection is failing.
  2. Unplug the modem for a full 30 seconds, then plug it back in and wait 2–3 minutes for it to attempt to reconnect.
  3. Check that the coax, phone, or fiber cable is firmly connected at both the modem and the wall outlet, and inspect it for visible damage.
  4. Check your provider's outage map or call them from a cellular device to rule out a known area-wide issue.
  5. If you have a separate splitter for cable or phone lines, try connecting the modem directly to the main wall outlet instead, bypassing the splitter temporarily.
  6. Let the modem sit for 10–15 minutes after a restart in case it's mid-sync with the provider, since this can occasionally take longer than expected.
  7. If the light remains red or orange after a restart, cable check, and confirming there's no known outage, contact your ISP for a line diagnostic and possible technician visit.

When to call a pro

If your ISP's remote diagnostics show a persistent problem with the line, they'll schedule a technician visit; this is typically free if the fault is confirmed on their end.

Safety

Generally low risk

Generally low risk for a careful person. Stop if anything looks different from what this guide describes.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.