Internet & modems

Cable modem needs a reset

Resetting a cable modem clears its temporary connection state and resolves most common slowdowns and connection drops, and is done differently depending on whether you want a simple restart or a full factory reset.

Difficulty
Easy
Time
5–15 minutes
DIY cost
$0
Pro cost
$0

Symptoms

  • Modem seems sluggish or connection quality has degraded over time
  • ISP support suggests resetting the modem as a first step
  • Internet was fine after the last reset but has slowly gotten worse again
  • Modem's lights show an unusual pattern that a restart might clear

Likely causes

  • CommonModem has been running continuously for a long time without a restartCable modems, like most networking equipment, can accumulate minor glitches over weeks or months of uptime.
  • CommonTemporary sync issue with the provider's networkA restart forces the modem to renegotiate its connection with the provider from scratch.
  • PossibleFirmware update available that a restart can triggerMany cable modems receive firmware updates from the provider that apply on the next reboot.

What to do

  1. For a simple restart (recommended first), unplug the modem's power cable, wait 30 seconds, and plug it back in, waiting 2–3 minutes for all lights to return to normal.
  2. If you have a separate router, restart it after the modem is fully back online, not at the same time.
  3. For a full factory reset (only if a simple restart doesn't help), locate the small recessed reset button on the modem and hold it for 10–30 seconds as specified in the manual, which will erase any custom settings.
  4. After a factory reset, you may need to call your ISP to 're-provision' the modem on their network, especially if it's a modem you own rather than one leased from them.
  5. Avoid resetting the modem more than necessary, since each reset causes a brief outage while it reconnects.
  6. Check for and note the modem's lights after the reset to confirm normal status before considering the reset complete.
  7. If frequent resets are needed to maintain a stable connection, this points to an underlying issue that's worth reporting to your ISP rather than continuing to reset regularly.

When to call a pro

If you find yourself needing to reset the modem frequently just to maintain a connection, contact your ISP, since this usually points to a line or equipment issue worth having checked.

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.