Please take a look at my post (link below) in relation to SureSignal V3 units failing with all lights out and the reasons why..
IF YOUR DEVICE HAS FAILED WITH THE LIGHTS OUT THEN THERE IS A GOOD CHANCE INTERNAL COMPONENTS HAVE BEEN DESTROYED BY HEAT AND CONTINUING TO LEAVE IT CONNECTED CARRIES A SMALL FIRE RISK. VODAFONE SHOULD NOT BE RECOMMENDING ANY OTHER ACTION THAN TO REMOVE IT FROM THE MAINS IMMEDIATELY.
Please report the failed unit to Trading Standards via Consumer Direct on 0345 4040506 who are investigating why so many of these units are failing catastrophically and that they are potentially a fire hazard when they do fail.
Trading Standards need to know about any failure where all lights are out as it is suspected that components on the power supply PCB has suffered extreme heat or voltages. Whether or not Vodafone replace under warranty or you have been told to go buy another, report it.
If you near to the unit when it failed you probably would have witnessed a loud bang with a bright flash.
These units fail anytime from new within a week to around two and a half years. Consumer law covers you to claim compensation or a refund as you should have reasonably expected it to have lasted longer.
You can use the UK courts to claim for up to six years from date of purchase so even if yours failed a while ago you can still make a claim.
For over three years Vodafone claim these devices are reliable and safe and have not addressed why so many are failing with heat damaged components inside.
https://forum.vodafone.co.uk/t5/Vodafone-Sure-Signal/Suresignal-V3-Overheated-Hot-Burnt-out-amp-Dead...
