What to do if the DSL/Broadband light on your O2 wireless box keeps flashing

It's normal for the Broadband or DSL light to flash when you turn on the O2 wireless box. But if it's working properly, it should stay lit after a few seconds. If it carries on flashing for more than about 30 seconds, there's a problem.

If you only ordered O2 Home Broadband recently, your BT landline probably hasn't been activated yet. This takes a little time - you'll get a text message and email from us when it's been done.

If you've connected to O2 Home Broadband before, and it's recently stopped working, try the following:

Check your connections

Make sure your O2 wireless box is connected to your landline through a broadband filter. These are the little white boxes with a short length of wire coming out from one end. We sent you two of them when you joined us.

Everything else plugged into your phone line must be connected through a filter too. That includes telephones, fax machines, Sky boxes, burglar alarms and so on.

Check your landline

Pick up a telephone connected to your landline and listen for a dial tone. If there isn't one, BT can look into this – so give them a call.

Restart everything

Shut your computer down. Unplug the O2 wireless box and disconnect it from the landline (make sure you note where everything goes). Leave it switched off for at least one minute. Then reconnect everything and switch it all back on. If it was just a glitch, this will probably fix it.

Don’t use long cables

Make sure you use only the supplied grey DSL cable to connect your O2 wireless box to your landline. Don't use your own extension leads, and if you’re using a splitter to turn one phone socket into two, remove it.

Unplug everything else

If you have other things plugged into your landline, disconnect them one at a time. If removing something in particular fixes the problem then it was probably interfering with the O2 wireless box.

Try moving the grey DSL cable and O2 wireless box

It could be that something near the O2 wireless box is interfering with it. Try repositioning the box and moving the grey DSL cable. Other electrical items like microwaves, heaters and televisions can occasionally cause problems.

Plug the O2 wireless box into your main BT landline socket

The O2 wireless box works best if it's connected to the main BT socket in your home. This is usually the socket nearest where your telephone line comes through the wall into your house.

If these steps don't solve the problem, give us a call on 0800 230 0202 free from a landline, or drop the first '0' to call free from an O2 mobile.

View our interactive guide to get more support setting up and going wireless

Check out our O₂ Guru TV video below:

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