Lan port will not light up when ethernet cable is pluged in

Troubleshoot the wired network connection
Make sure you are using an undamaged Ethernet cable, check for a green light near the Ethernet port on the printer, and then print a report to verify the connection.
Turn off the printer, and then disconnect the Ethernet cable from the router and the printer.
Check the cable for damage, and then verify that it is an Ethernet cable and not a phone cable.
NOTE: Ethernet and phone cables look similar, but Ethernet cables are usually bigger and have eight visible wires on the connector.
Reconnect the cable to a different Ethernet or LAN port on the router, and then connect the other end to the printer's Ethernet port.
Turn on the printer.
Check the lights on the printer's Ethernet port to make sure the connection is successful. The green light should be steady, and the orange activity light should blink.
Print a Wireless Network Test Results or Network Configuration report.
Inkjet printers with a control panel menu: Open the Wireless, Network Settings, or Setup menu to locate the list of available reports.
Most inkjet printers without a control panel menu: Press the Wireless and Information buttons at the same time, or press the Wireless and Start Copy Black buttons at the same time.
LaserJet printers: Press and hold the Wireless button for 10 seconds or until the Ready light blinks, or go to the Wireless menu and select Wireless Network Test.
Laser NS and Neverstop Laser printers: Press and hold the Resume and Wireless buttons for 3 seconds.
DeskJet 6000 and 6400, ENVY 6000 and 6400, and Tango printers: Touch and hold the Information button until all control panel buttons light up, and then touch the Information and Resume buttons at the same time.
Make sure the Network Status is Ready, or follow any instructions to resolve network issues identified on the report.



Regards,
Rachel Gomez

Hi there,
The LAN lights will only turn on once you have an Ethernet cable connected to it and the other end of the cable is connected to a working computer.
If you already have a computer connected to the Ethernet port of the router via an Ethernet cable and the lights are still off. Check if the computer you have connected recognizes a network via LAN.
If the lights on the router are still off and the computer doesn't recognize a network then that means that the port for the ethernet of your Router is bad and sadly there's no way of getting that fixed but to have the router replaced.
Otherwise if the lights are off and the computer recognizes the Network and lets you connect to the internet or other computers on the same network then its just the LED of the LAN light that's broken and I think you can live with that.
Hope this helps!

Yeah, the link light on the router should be coming on.
A few simple things to try:
Try a different network cable. Try a different port on the router. Visually inspect the port on the system and router to confirm they are not physically damaged in any way.

I have used Cat5e plenum Cable for my internet connection and I faced same problem. If you are just concerned with internet access and not access between devices on your LAN, then you just need to connect the first router LAN to the WAN port of the second router with the mentioned Ethernet cable. It is also in your best interest to make sure the IP ranges are different between the two DHCP servers you now have. That is, make sure they are not on the same subnet or serving up conflicting IP's.

Telephone wall-plate <---- 4-strand telephone-cord ---> telephone-port in modem

AC power from wall-plate to modem.

LAN port #1 <--- Ethernet cable --> network-port on desktop/laptop computer #1.
LAN port #2 <--- Ethernet cable --> network-port on desktop/laptop computer #2.
LAN port #3 <--- Ethernet cable --> network-port on desktop/laptop computer #3.
LAN port #4 <--- Ethernet cable --> network-port on desktop/laptop computer #4.

Configure the router's wireless adapter:
* set a SSID
* set an encryption-level, e.g., 'WPA'
* set a network password

Use the SSID/password to configure your wireless devices (iPod Touch, iPad, XBOX 360, etc.)

One Ethernet cable goes from the WAN port on the router to the cable-modem (or DSL-modem).

Another Ethernet cable goes from one of the LAN ports on the rouer to your first PC.

Another Ethernet cable goes from one of the LAN ports on the rouer to your second PC.

have yo installed the printer on to the system ( add a printer ), have you installed the correct driver for the printer
it is not a matter of just connecting leads and expecting it to work

Hi there.
Restart the PC and go into the bios to make sure the on-board LAN is enabled, if it is try as jery says and try another ethernet cable.

Post back please and good luck

1. start the troubleshooting process by making sure that everything (routers,switches, hubs, modems, and computers) is firmlyplugged in.
2. If your computer is on and the other end of the Ethernet cable isconnected to a network device, the link or activity LED should light.If the light remains dark after you plug in the cable, replace thecable. If replacing the cable gives the same result (no green light), then go to the next step.
   
3. Once you’ve eliminated cabling as a source of the problem, it’s time tolook to your computer. Start by making sure that your computer is able toaccess your Ethernet card. A good tool for doing this, and subsequentnetwork troubleshooting, is the command prompt.
4. Select Start, All Programs, Accessories, and then Command Prompt. When the Command Prompt window opens, type ipconfig –alland press ENTER. Various lines of information will display, dependingon how your system is configured. Look for a section labeled EthernetAdapter Local Area Connection. This section should include a linelabeled Description, which should be a description of your Ethernetcard. If you see it, then your computer knows about your Ethernet cardand has successfully loaded the necessary drivers. If the Descriptionline is blank or missing, you will need to reinstall the drivers foryour Ethernet card.
5. Your Ethernet card doesn’t detect a connection to the Ethernet cable. Open a command prompt, type ipconfig –all,and press ENTER. If the section that starts with Ethernet adapter LocalArea Connection contains a line labeled Media, with a status of MediaDisconnected, then your computer is unable to detect that a link hasbeen made from your Ethernet card through the Ethernet cable to anothernetwork device, such as your computer or router. Recheck the cabling.Use a known good cable to connect your computer to a known good networkdevice and then perform the check again. If the status is still MediaDisconnected, and you are sure that the cable and the network devicethe cable connects to are good, then you may have a bad Ethernet card.Reinstall the Ethernet card. If the problem continues, you may need toreplace the card.
6. Other things to check:
7. Bad connection, bad cable, or wrong cable. The ports on arouter, hub, switch, wireless access point, and print server can, likeany other device, go bad. However, the most common problem is not a badport but a bad or loose connection, a bad Ethernet cable, or the wrongtype of cable. Refer to the Cabling section above, to eliminate thesepossibilities.
8. Wrong port. One possible cause of Ethernet port problems isusing the wrong port on a network device. For example, routers have WAN(wide-area network) and LAN ports. These ports accept the same Ethernetcabling but are not interchangeable. The same is true of hubs andswitches that have uplink ports, which are specially wired LAN portsthat allow easy cascading of multiple hubs and switches. In some cases,the uplink port is also a normal LAN port controlled by a switch on thedevice. If you’re using the uplink port as a normal LAN port, make surethe device is configured properly for this type of use.
   
   If aport doesn’t appear to be working, you can use the link light toconfirm it. Port link lights should always be lit when a good cable isconnected between the port and another working network device. If youuse known good cable and a known good network device to test the portbut the link light isn’t lit, you may have a bad port. You can eitherreplace the network device, or in the case of a hub/switch, add a hubor switch to gain more LAN ports.
9. You cannot connect to other computers or router/Internet. Whenother computers in your LAN can connect to each other, as well as tothe Internet or other services, and your computer cannot, this may bean indication that your computer did not receive an IP (InternetProtocol) assignment when you booted.
   
10. Open a command prompt, type ipconfig –all, and press ENTER. Inthe section labeled Ethernet adapter Local Area Connection, look forthe line labeled IP. If it starts with 169, you have a self-assignedIP, which indicates that your computer was not able to acquire an IPassignment from the DHCP (Dynamic Host Configuration Protocol) server.
    
    Test your access to the DHCP server by using the ping command. Open a command prompt and type pingfollowed by the IP address of the DHCP server. Your DHCP server isprobably the same as your router. For example, if your router’s IP is192.168.1.1, then type ping 192.168.1.1 and press ENTER. Youshould see four lines of text, starting with Reply From 192.168.1.1:Bytes 32, followed by time values that indicate how much time elapsedbetween the ping command and the router’s response. If you see fourlines that say Request Timed Out, then your computer cannot reach yourrouter/DHCP server.
    
    Make sure the router is plugged in,turned on, and properly configured to provide DHCP services.

These are just a few things to try to help figure out if it is your cable, ethernet card, router, or some other problem.

Since you already tried a different ethernet cable and still the same, you can try this just to make sure if the lan port of the router is bad or not, connect one of your pc or your laptop to the router and check if the lan port of the router will light up. If the port light of the router is on when the pc is connected to the router better check the lan connection of your printer.