Hello folks. Need some advice please. Took pictures down to do some decorating and was about to put them back up when I decided that even although they were a good distance from light switch and sockets, I would check with a detector. Tried with two of them and they both indicated an electric cable exactly where I wanted to put the pictures back up. Obviously I won't be putting them back up there but should I be worried that the cable behind the wall may have already been damaged when I first put the pictures up about 3 years ago (took them down about 3 weeks ago to decorate). Many thanks for any help and advice.