Suddenly this morning one of the computer on our network keeps dropping it's network connection. The computer run an up to date Windows XP Pro and is a Lenovo 3000 J110 computer. The network card is onboard and "from" Broadcom.
As soon as the computer is started Windows report that "A network cable is unplugged". Soon after, the cable seem to be plugged in again and windows report "Acquiring network address". It then proceed to go from the first message to the second every 5-20 seconds.
If I look behind the computer the LEDs near the network plug are not lit when the computer report that the network cable in unplugged.
- I've tried a new cable, same problem.
- I've tried another computer on this cable, worked fine.
- I've tried downloading and reinstalling the network adapter drivers, same problem afterward.
- I even tried disconnecting the power from the computer for a minute, did not solve the problem.
Does anyone have any idea what might be the problem. Otherwise, what should be my next step in diagnosing this problem?