magik

Hi there everybody, names ''magik'' and i've just joined this site. Did'nt know which forum to choose so hopefully i will reach somebody who can help me. My question is, I have bought from ebay a pack of 10 led striplights without resistors. When i connect them up to a correct power scource, a transformer set at 3volts, they wont light up. i've connected them with the correct lead to the positive but they will not light up. I've even connected them with a resistor and the other way round but still they will not light up. BUT when i put my finger on the actual strip light itself they light up. IT seems as though my body is acting as some kind of earth. Now i also have a set of these lights taken from my old layout which definately work and the same thing happens. What can i do to sort this out please? PS I also have other lights such as yard lamps which work perfectly well without a resistor. I have tried to contact the seller of these lights but he has failed to reply to my requests for help. Any help will be gratefully received. Thank you