What to do if my NETGEAR Modem cannot access the Internet but the Internet LED is green?
If the Internet LED on your NETGEAR Modem is green but you cannot access the Internet, make sure to register the cable MAC address or device MAC address of your modem with your cable Internet provider.
How to fix NETGEAR CM400 when all LEDs are off?
If all LEDs are off when the NETGEAR Modem is plugged in, check that the power cord is properly connected to the modem and the power supply adapter is correctly connected to a working power outlet. Also, ensure that you are using the 12 VDC power adapter from NETGEAR designed for this product. If the problem continues, contact technical support.
What to do if Ethernet LED is off on NETGEAR Modem?
If the Ethernet LED is off for a port with an Ethernet connection on your NETGEAR Modem, ensure that the Ethernet cable connections are securely plugged into both the modem and the connected device (computer, router, or WiFi router). Also, verify that the connected hub or computer is powered on and that you are using the correct cable.
What to do if all LEDs stay on NETGEAR CM400 Modem?
If all LEDs stay on the NETGEAR Modem, clear the modem's configuration to its factory defaults. This will set the IP address to 192.168.100.1. If the issue continues, contact technical support.
General| Modem speed | 340000 Kbit/s |
|---|---|
| Flash memory | 8 MB |
| Product color | Black |
| Internal memory | 64 MB |
| Copper ethernet cabling technology | 10BASE-T, 100BASE-TX, 1000BASE-T |
| DC-in jack | Yes |
| Ethernet LAN (RJ-45) ports | 1 |
| Browser supported | Microsoft Internet Explorer 5.0, Firefox 2.0, Safari 1.4, Google Chrome 11.0 |
| Compatible operating systems | Microsoft Windows 7, 8, Vista, XP, 2000, Mac OS |
| Cables included | LAN (RJ-45) |
| Internal | No |
| Certification | CableLabs |
| Compatibility | DOCSIS 3.0 / DOCSIS 2.0 |
| Power supply type | DC |
| Networking features | Gigabit Ethernet |
Weight and Dimensions| Weight | 190 g |
|---|---|
| Dimensions (WxDxH) | 96 x 30 x 147 mm |
Details the items included in the CM400 cable modem package.
Describes the status LEDs on the front of the cable modem.
Identifies the connections and buttons on the rear of the cable modem.
Explains the information found on the cable modem's product label.
Instructions for attaching the stand feet for vertical placement.
Step-by-step guide on connecting the cable modem to power and network.
Guidance on contacting your ISP to activate and set up internet service.
How to access the cable modem's web interface for settings and monitoring.
Procedure to manually set the starting frequency for cable connection.
Tracking the cable modem's connection and provisioning status.
Accessing basic information and status of the cable modem.
How to view and clear important event logs for troubleshooting.
Steps to change the default administrator password for security.
Instructions for restarting the cable modem to resolve issues.
Restores the cable modem to its original factory settings.
How to perform a factory reset using the physical reset button.
How to perform a factory reset via the web interface.
Interpreting LED indicators on the cable modem for troubleshooting.
Troubleshooting steps for issues accessing the cable modem's interface.
Resolving problems with the cable modem's internet connectivity.
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