Simple 4x Ring gas hob … hopefully a simple fault but am visiting elderly relative and ignition has stopped working on her hob … you get a very, very faint click when you push the button but nothing else … strangely, when 1x hob is lit, if you then try it you get a much stronger but slow pulsed spark … any ideas anyone before i leave here tomorrow a.m … am I looking for a battery to replace ? … or is there 240v supply somewhere going to it ? she has no idea and i cant see behind the back of the cupboards … all help greatfully recieved … ta gents ! Rob