I am trying to set up a PC to PC LAN via a CAT5 crossover cable. PC1, after some difficulties, 'got with the program' and showed a LAN connection. However, PC2 shows the red 'X' in the Network Connection Icon, and displays the message 'Network cable unplugged'. In 'Network Setup Wizard' it tells me that my network adapter is disconnected, but when I check out 'Properties', I am told the device is working properly. If I try the 'Network Setup Wizard' on PC1, when PC2 is switched off, I get the same information as PC2 displays all the time, whether PC1 is switched on and is showing a connection or not. Is this a hardware problem or software?
Both computers are running Windows XP SP2. PC1 says it has a SiS 900-Based PCI Fast Ethernet Adapter, and PC2 has a SiS 900 Fast Ethernet Adapter (not 'Based'). Both Network Adapters are built into the Motherboards. PC2's Motherboard is a K7SOM+ made by ECS.
What I have done so far: Tested the cable with a cable tester, swapped it end for end, tried another cable, swapped it end for end; Checked out the RJ45 LAN socket, and cleaned its pins; Uninstalled the driver then reinstalled it, rolled back to an earlier version of the driver, updated to the most recent driver; Updated Windows; Scanned for viruses, etc, with an updated utility; Tried all the options of 'Media Type'; Tried all the various 'protocols', etc; Disabled the power saving and firewall; Manualy entered different IPAddresses, same Subnet Mask.
The 'Network Diagnostics' scan only gives a 'PASSED' to the 'WAN miniport', the other network adapters listed receive no grade, and the IP address is not listed. I can connect to the internet with either computer with no problem.
I find it curious that PC1 can communicate well enough to PC2 through the so called "Unplugged" cable to establish if PC2 is turned on or not. I am wondering if it may be a hardware/physical connectivity issue between the Network Adapter and the RJ45 LAN socket attached to the edge of the Motherboard on PC2? Does anybody out there happen to know where I might find a detailed schematic diagram of my Motherboard, or information about the SiS 900 Fast Ethernet Adapter? The drawing in the 'Users Guide' does not show enough detail, like the position of the Network Adapter.
I would greatly appreciate help with this vexing issue, as this is the now the third forum I am posting to (the previous two were; Microsoft Windows XP and AMD).