Help! - Can't Access Other Computers Through LAN Network

[Crellion101]

I have a group of newspaper computers for our school. We have them networked to their own network with a 16 board switch. Yet somehow one of our computers are getting problem accessing our main server of the network (which is basically our head desktop with a 100 gig hard-drive) of the WinXP Pro network. All our computers are Dells with WinXP Pro, yet it seems that it is this one computer that cannot access anything on the network except itself. In fact, in My Network Places, we can see the other compters, but when clicking on it, a message box says, ".... not accessible... The network path is not found." Several other computers appear online in this computer's My Network Places, but they all give that message. I have set NetBIOS on default on my network connection setting. Wierd thing is - this computer was working fine on the Network a month ago before the hard-drive crashed and we had to replace it. Anybody can help me? I been pulling my hairs out trying to fix this....

 

[imported_Nacelle]

first try plugging into a differant port on the switch
then try a differant cable
then try a new nic