The "Network Cable Unplugged" indication means that you have a network adapter installed and enabled but which isn't connected properly to another network device - hub, switch, router etc.
There can be a few reasons for this:
- the cable is literally not plugged in properly at one end or the other.
- the wrong type of cable has been used. When connecting two PCs *directly* (Network Adapter to Network Adapater) a *CROSSOVER* cable must be used. To connect a PC's Network Adapter to a hub, switch or router, a "straight-wired" cable is used.
- many routers have an "Uplink" port. One of the LAN ports can be used to "uplink" to another network switch so that additional computers can be connected. There is a little button to toggle this port between a normal LAN port and an Uplink port. The effect of this button is identical to swapping between "crossover" and "straight-wired" cables. Therefore, if you have connected to an Uplink port with the button in the wrong position, this would give you the "Network Cable Unplugged" error.