Thanks Mike. C47 was one my suspects earlier so I replaced it with 220uf (my kit had 470uf). The lower value made no detectable difference. I pulled the chip and put it in an arduino uno and the IDE recognised the chip so may its not completely dead. I'll try to reflash it when I get a chance and see if that wakes it up. And then see if no C47 works. I see there is still some filtering at C37 on the 5v line.
Thanks for the idea.
73
Simon VK3ELH
