Thanks Arno, Excellent information and advice, makes sense to me. I have only a very moderate knowledge of electronics and was wondering why the LEDs failed in the first place and how to prevent a re-occurrence. Judging by the colouration of one PCB it looks like the resistors had at some time got pretty hot, presumably when the voltage got high.. -- David Crisp SV Wilna Grace Amel 54 #58
