limited or no connectivity- wired LAN

[Guest]

Hi folks
Somebody please save me from a nervous breakdown

Im not complete novice but I have one computer on a network of 15 wired and
two wireless, that will not connect to the network.
No matter what I try the dreaded message comes up about limited or no
connectivity comes up.
Tried Google search for info(1,300,000 results) scoured dozens of them and
download a few utilities that appeared in quite a few, hoping they would do
the trick, tried them all and had no joy at all.
Today I lost all hope and set it back to factory default(silly I know, but
it I didnt lose my job for it, which I would have if I'd took my other
option).
Needless to say it didnt work!!!!!!
Ive tried repair in the connection window, release and renew in dos, the ms
fix, winsock repair/tcp/ip repair and a couple of other so called remedies.
All of the other pcs are fine, but i cannot get an ip address for this thing-
tried changing cables, sockets on router, different router and even plugged
in a wireless adapter to see if any of them worked.
Sorry for being so long winded but I,m at rock bottom and need some other
suggestions.
Using Winxp pro SP2- Pc only 7 month old and until Monday no probs at all
Thanks
Neil

 

[Bob]

Neil,

About a week ago I was butting my head against a wall too. Small network,
would not connect no matter what I tried. Long story - but about an hour
goes by of farting around and I finally decide to change the NIC. Brand
new, still in the box, NIC card. Install it and now I can download (slowly)
but no uploading. What the hell? Second, brand new NIC, this time slow as
hell uploading but my download speed was okay (as measured by
www.speakeasy.net ). This is getting hard to believe but now I rip out a
known good NIC from another computer and get the similar symptoms depending
on how I'm holding my tongue. Arrrrrghhhhh....

Bad port on the router evidently also took out the front-ends on the NIC
cards after awhile. Installed a new router, used the same known good NIC,
and all was well with the world. Even though a NIC card will test good in
the PC using internal loopback, unless you test with an external loopback
plug, you're not really testing the whole card. Front-ends on NIC cards are
typically optically isolated and unless you can do an end-to-end test,
you'll never "really" know if the front-end is bad or not.

1.Try different port and cable on router.
2. Verify that the IP address is valid if not using DHCP
3. Is the router port forwarding this address or blocking it for some
reason?
4. Do try a known good NIC and change router ports and cables if you can -
or move that PC to a different location to test.

Lot's of Scotch often helps when problems like this defy common logic....

Bob S.