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Well in order to get link light, the items on either end of the cable need to be working. What is on the other end and is it powered up? May want to power cycle the end device?
Could be the cable, try another. Make sure it is fully plugged in and be aware there are 2 types of Ethernet cables, "straight" and "roll over" they are wired differently for different purposes. Most likely you need a "straight" cable?
Could be the NIC card, hold here for now.
Could be the NIC was disabled in software? Check under Control Panel, Network Connections, even if it is enabled, toggle the setting or reboot the machine.
Try to connect the computer to a different device that is known to work with a known good cable.
If you are handy you can make a Ethernet loop plug to test the NIC.
Driver problem?
Spyware or a virus?
Hope this gets you started.
JamesO
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