Thanks for your help everyone
I have tried to reset it by the button on the back of the device which didnt work, neither did new batteries
I've bought a replacement UPS after some deliberation which is more expensive than the Maplin one I saw, but it's the same brand as the one I has APC and the model they brought out to replace our current one.
As everyone seems to be of the opinion one that the Maplin one was a "budget" choice, I didnt want to go with that over something as important as all our data.
Thanks everyone for your help, I dont know squat about IT so thanks for pointing me in the right direction
