Another Network Problem (1 Viewer)

[fatmuscle]

Here's one i'm a bit lost with...

A computer connected to a router/switch keeps saying the network activity keeps dropping out.
It'll detect a connection, then lose it, then find it again, then lose it.
IE: the LAN Connection says: "LAN now connected. Speed 100Mbps" then it'll go to "Network Cable unplugged"

So here's what i've done to try to diagnose the problem:

*Tried to use both DHCP and Static while doing a "Ping <IP Add> -t" --> same problem
*Tried switching cables --> same problem
*Tried switching ports on router/switch --> same problem
*Tried resetting the router/switch --> same problem
*Tried a "Ping <IP Add> -t" test with a diff computer with the same cables and port on router/switch --> results say that all ports and cables tested with are fine and working 100% with not packet losses.
*Took the affected computer to another network, and carried out a "Ping <IP Add> -t" test on the diff network --> no packet losses
*Cleared all spy/ad-ware --> same problem

So after all these tests, I'm thinking...
1. The router/switch is working fine, and all the ports on the router/switch are in good condition and working well.
2. The cables that i tested with aren't damaged.
3. The NIC on the affected computer is fine.


So I've now got no idea what could be wrong. I guess a possible cause could be an electrical pulsating surge somewhere that's affecting the computer.

The things i'll have to carry out next would be:
*upgrade router/switch firmware?
*try all the same hardware but in a different environment?
*install another NIC?
*Format PC



If you could help solve this issue, or throw in some suggestions, it'll be very much appreciated.

 

[seremify007]

Are you absolutely sure your router/switch and cables are fine? The only other possibility I can think of is you have some firewall blocking the NIC? My firewall (for some reason) has a tendency to block my iPod from connecting to iTunes >__>

I've heard doing "ipconfig /renew" sometimes fixes things.. but I'm really not sure what's causing your little problem. When my router used to do that it was because it was overheating so I put a desktop fan next to it.

 

[fatmuscle]

tested each port on the router with 3 sets of cables and two different laptops.

yeah, I'll be checking the firewall. But i doubt that's the problem.
and I'll give your heating issue a go and clean out the case.