Bad LAN connector problem on MB?

I have an ASUS P4533 motherboard that has a built in RJ45 connector that is apparently connected to an onboard Realtek 100/10 Mbps LAN adapter. I'm trying to find out how to determine if it is working or not. One day it was working and the next day I get a "network cable is unpluged" notice for my Local Area Network and I can't connect to the internet. I changed cables with a cable that I know works and get the same error message. When I check my Local Area Connections Properties, it says Connect using SiS 900-based PCI Fast Ethernet Adapter and under Device Status, it indicates "This device is working properly.

If the problem is not the cable and the "Device is working properly", then where is the problem located?

I recently upgraded to Windows XP Home SP2 (from SP1) could that be a problem? (It worked for two days using SP2). Do I need to reload a new driver? If so what driver. I downloaded a driver for Sis 900-Based PCI Fast Ethernet Adapter (sl117.zip) from the SiS site but am not sure this is what I need.

As you can see I really don't know what I'm doing and need help. Any advice will be appreciated. Thanks, Mack

Windows XPHome SP2, P4-2.4gig, 1 gig ram.
DSL modem, D-Link Router. Note: Modem and Router work fine. My other computer connects to the internet without a problem. I tried plugging Comp #2 cable into Comp#1 port on D-Link router and Comp#2 was able to connect to the internet so it's not the router.

 

You say that the onboard NIC is a Realtek 10/100 LAN adapter, but Windows XP has apparently identified it as a SiS 900-based PCI Fast Ethernet Adapter.

You might try updating the driver. But use the drivers provided by the mobo manufacturer, not the SiS driver. The LAN adapter circuitry may have been modified by the mobo manufacturer in the process of embedding the LAN adapter in the mobo.

Also -- can you PING the router? If so, what response do you get? Will WINIPCFG successfully negotiate a new IP address lease when you run it? If you can do those things, can you PING the other machine on your LAN?

 

Thanks for the reply Rob.

Yes, to the first statement. I will try to download a new driver from ASUS.

Re: "Also -- can you PING the router? If so, what response do you get? Will WINIPCFG successfully negotiate a new IP address lease when you run it? If you can do those things, can you PING the other machine on your LAN?"

Not sure how to do any of those things.

What I did do was put in a Ethernet adapter card and switched it to the Network Bridge column, then took the nonworking SiS adapter (if it really is that... could be a RealTek and Windows is not IDing it correctly) and moved it to the LAN or High Speed Connection column in Network Connections. I'm now able to connect to the internet. I still have the icon in my tray at the bottom of my screen that indicates a network cable is unplugged. Do you think if I disable the "SiS adapter" in Network Connections that it will remove the icon? Or is that a bad thing to do?

Thanks, Mack

 

You'll have seen in my sig block that I use Win98SE, not XP. So I'll have to leave instructions on running PING and WINIPCFG for someone who uses that OS.