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Can't get network connection

Dell Optiplex GX150 and Windows xp sp2. Cannot get network cable to work. No nic card lights. Have tried 3 different machines and 3 different cat5 cables. IT insists port is live, and a wired laptop does connect okay. Have tried internet search fixes including registry changes, installing netbui, etc. to no avail. Have reinstalled driver. Have also tried changing media types for nic. Help!
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John
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So you've tried 3 different machines, meaning 3 other computers but then a laptop did connect? In other words, did you get something to work on the network drop?
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A separate dell laptop worked fine. None of the dell gx 150s worked.
Maybe the Dells have the NIC disabled in the BIOS since you're not getting link lights on any of them.
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nic is not disabled in bios. Connected a 25' to pc and inserted in a known good jack and behold the lights came on. I now have a bone to pick with the it guy. They insisted that the jack was functional. Any guesses as to what's wrong with the jack?
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The jack is good. I even had them replace it. Works for a dell laptop but not my gx-150. Now trying a separate nic card (3c905b-tx) after disabling onboard nic. still no luck and can't find good driver. computer recognizes nic, but still will not connect.
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wouldn't the cable testers (x2, one was the it guy's tester and one was the jack installation guy) show a malfunctioning cable setup?
any good drivers for xp for the (3c905b-tx)?
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I managed to get connectivity on the same machine at a known network capable connection by inserting a nic card and updating the driver. Now I need to convince them (IT) to either rerun the cable to the original location or at least checking the connector at the patch panel end.
still waiting for it to check cable at panel end.
still waiting for cable pull.
new cable pull resolved problem
Thank you. Glad to hear that a new cable pull resolved problem.  ... Thinkpads_User