Dell Vostro 3450, lost Wired connection

Dell Vostro 3450 Windows 7 Prof. Realtek PCIe GBE nework card not working
I tried unistalling and reinstalling
I have the latest motherboard BIOS and Dell driver for this NIC
it stil shows not connected

any sugestions?
jsarinanaI.T. ManagerAsked:
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jsarinanaConnect With a Mentor I.T. ManagerAuthor Commented:
still not working after the reset
no activity
rule out cable, bad port, faulty switch and then come to computer port.

uninstall from device manager, dont delete the driver, reboot computer. it will pick up and install automatically.
web_trackerConnect With a Mentor Commented:
If you swapped a known good cable and the lights on the computer port does not light up, try restarting your router or network switch. If you got another device such as a laptop or another pc,  or network tester, check to see if they can connect at this location. If any of these devices can connect at this location it is fair to say that the vostro computer is having a problem, either a hardware or windows problem. I would try disabling the network card then re-enabling the card in windows.  If you do not have another computer/laptop or tester to test the connection. Try restarting the switch or router, and if you are using a cable modem restart the modem. It is hard to troubleshoot this issue when you do not really tell us how it is connected, is this a home environment or an office environment. But following the above steps can help some what. You can try rebooting the computer. I am not sure what all you have done already.
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jsarinanaI.T. ManagerAuthor Commented:
It's not my network, switch, cable
I did uninstall the driver already
I'm thinking it's h.w.
Then run TCP/IP Repair:

Open cmd.exe with Run as Administrator.  Then  netsh int ip reset c:\resetlog.txt

Reboot your computer and try again.
 Is there any activity at the network card, or does it say cable unplugged?
If this does not work it is possible hardware related.
install another lan card to test
you can disable the onboard one in the bios
jsarinanaI.T. ManagerAuthor Commented:
I installed a NIC on the USB and it works fine
it has to be the MoBo, NIC went out, i have 5 of these laptops
FYI:  i'd rate these 2of4 stars
nobusConnect With a Mentor Commented:
i assume you installed all the drivers for this laptop?
do you have a network card listed in Device manager?  without error?
also - does the wifi lan work?
jsarinanaI.T. ManagerAuthor Commented:
Lists out normal wifi works fine
can you post a picture of device manager, with networking expanded?
jsarinanaI.T. ManagerAuthor Commented:
Thanks for trying, it's a bad NIC on MoBo
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