Hi everyone. i have a problem with our kitchen downlights. We have 12 in 3 zones. Each unit has a Robus RM70DN transformer. It was a qualified electrician who did the work. From the light unit the twin cable goes into a black box which contains a terminal connector block. This is then wired to the transformer. From there I don't know how it's wired. The problem is this. At times a light begins to fade on and off. It then goes out completely. I checked the lamp - correct voltage - and that's okay. I take the unit out of the ceiling void and find that the connector block is burnt out, The block has melted. The transformer is okay. I rewire the block cotting back the cable to fresh cores. Usually this works. The latest time I did this proceedure and the lamp still didn't work. I renewed all the cable up to the transformer. Still no luck. I put it all back and was about to order a new transformer when the light came on. After 5 minutes it went off. Anyone got any ideas?