I’ve added a new article called Troubleshooting Internet Connection Problems to the Tutorials & Guides section. You’ll find it helpful for diagnosing and fixing problems when you:

• Can’t access a web site.
• Can’t get online at all.
• Can’t connect to a wireless network.

This excerpt describes a method for curing many modem- or router-based problems.

Trouble accessing the Internet

If you can’t access the Internet at all, start by checking your hardware:

1. Is your modem on? Check that all the usual lights are lit or blinking as appropriate. It helps, of course, if you know which lights are usually lit solid and which flash, so if possible position your modem (and your router) so you can see the status lights.

If the lights are not lit correctly – or if you’re not sure whether they are – reboot your modem: disconnect the power cord, wait about a minute, then reconnect the power cord and wait for the lights to come on. Then try your Internet connection again. If the lights are not lit, ensure the power cord is properly seated, then check the Ethernet or USB cable between your modem and your computer. Don’t just give the cables a look over; instead, disconnect each end of the cable and plug it back in securely. If you’re using an Ethernet cable, it should make a click when it seats properly. If you’re using a USB cable and have it connected through a hub, take the hub out of the loop: disconnect the USB cable from between the modem and the hub and connect it directly from the modem to a USB port on your computer. Also, if you’re using a USB port on the front of your computer, try disconnecting that cable and plugging it into a USB port on the back of your computer; sometimes, the ports at the front do not have sufficient power to do the job.

Tip: Prepare for trouble

Most ISP’s list their technical support phone number on their web site (although you may have to dig around to find it). Write it down now, before you have a problem with your Internet connection, and stick it somewhere handy. Also, make sure you have a copy of your router’s documentation on hand – you should find a downloadable version at the manufacturer’s site.

If the modem lights still fail to come on, give your ISP a call. There’s a good chance there’s something wrong their end.

2. Is your router on? If you use a router in conjunction with your modem, make sure the appropriate lights are lit and check its cables, too. Even if the correct lights are on, try resetting the router by disconnecting its power, waiting a minute, then reconnecting the power.

If the router’s lights fail to come on but your modem appears to be working, your router may have failed. Routers have a tendency to go bad silently and without notice. One way to check whether the router is kaput is to disconnect your computer from the router and reconnect directly through the modem. If you can successfully connect to the Internet without the router intervening, there’s a chance the router no longer works. It’s also possible that the router’s internal firewall or security settings are causing a problem, but in that case, its lights should still display as usual.

Sometimes, rebooting the modem and the router separately is not enough, but a full reboot may do the trick:

1. Switch off your computer and unplug the modem and the router.
2. Wait a minute.
3. Plug in the modem and wait for its lights to come on.
4. Plug in the router and wait for its lights to come on.
5. Switch on your computer.