The lights (sometimes called LEDs) on your modem can help you diagnose a problem with your broadband connection. Each type of modem is different – so click on your modem from the list below to find out more:

3Com CMX

3Com Tailfin

Motorola SURFboard – models 3100/4100/4200/5100

Ntl:home – models 100/120/200

Ntl 250

Pace set top box

Samsung set top box

Scientific Atlanta WebSTAR – models DPX100/DPX110/EPC2100

Terayon Terajet

Virgin Media 255/256