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.
I am currently working with Vodafone's CEO and Trading Standards on this issue.
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 so catastrophically and that there is potentially a fire hazard when they fail.
When you get through, let the operator know that West Berkshire Trading Standards are monitoring for calls in relation to this product and that you wish to register your details as well.
If Vodafone offer a replacement (even under warranty), do not hand in your old unit but instead tell them that you want to hold on to the device for further investigation and you are willing to prove the device is faulty by taking it to a local store as I did.
Ensure you let staff know that in plugging the device into a mains socket that there is a small risk it could set on fire.
Trading Standards need to know about any failure where all lights are out as it is suspected that components on the power supply PCB have suffered extreme heat or voltages.
Whether or not Vodafone replace under warranty or you have been told to go buy another, you must report it as any replacement will most likely suffer the same demise.
If you were near to the unit when it failed you probably would have witnessed a loud bang with a bright flash.
These units can 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 or it is out of warranty you can still make a claim.
If you need help with information to make a claim, contact me directly where we can open up the unit, take pictures and report on the failure.
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.
Mine was replaced at two and a half years after contacting Trading Standards and suggested I would have the unit design inspected. I work in electronics and checking components and design is where our factory specialise and there are some serious questions over the design of this product.
https://forum.vodafone.co.uk/t5/Vodafone-Sure-Signal/Suresignal-V3-Overheated-Hot-Burnt-out-amp-Dead...