Internet troubleshooting
I will deal with hardware problems that can cause internet problems. software problems usually are cause by incorrect configuration of the TCP/IP protocol required by all types of internet connections.
1 Check your host configuration
if your host isn't set up correctly, it cant share its connection with clients. Check the bindings for TCP/IP or other protocols used to create the shared connection.if you are using Microsoft's ICS and two Ethernet cards, you will see entries in the network configuration on the host computer for each Ethernet card and for the ICS software itself.
2; Chect your client configuration
Make sure that your clients have correct TCP/IP, DHCP, and protocol settings for the host. The ping command can be used to check the internet connection; Try pinging a web site by opening a windows command prompt and type a command, such as "ping www.selectsystems.com" If you have a working internet connection, you should see the IP address for the web site specify and the round-trip time (or ping rate) for four signals sent to the web site. If you get no response or see an error message, you might have a configuration problem with your TCP/IP configuration.
3; Diagnosing connection problem with signal lights.Signal lights are found on the most external broadband device, such as cable modems,wireless broadband routers, and DSL modems. The signal lights indicate whether the unit is receiving signals from the computer, sending data to the network, or receiving data from the network and whether the unit can "see" the network- even if no data is currently flowing through the unit.
on many units, the power light also is used to indicate problems.. If the light is normally green, for example, a red light might indicate the unit has failed. Other lights flash when data is being sent or received. On cable modem or wireless broadband routers, look for a signal lock light,; this light flashes if the unit is trying to lock onto a signal from the cable network or wireless transmitter. For information on this contact the user manual or vendor's web site.
4; To make sure that the USB port is working, check the Device manager in windows; a working USB port is listed as a USB Root hub and a PCI to USB Universal Host Controller in the Universal Serial Bus device category. if this cagegory is not listed and the ports are physically present on the computer, make sure you are using windows 98/2000/XP/Vista. If you are, be sure the USB ports are enabled in the system BIOS
5; Use sound to diagnose your modem/usb
if you listen to your modem or usb when it makes connection. you might have realised that different types of modem make distinctive connection sounds and that different connection speeds also make distinctive sounds.
Thanks
Hope this helps a little bit.