Hi,
I am getting missing SPI SCK signals coming from an 18F46K20 PIC..

It is intermittent and while it wasn't working, I probed it with a DATA analyser while running a logic analyser, which seemed to turn on the SCK. The odd ones on the attached, are me probing!

Does anyone have clues as to what's wrong. I think it only faults with this PCB?
I've resoldered the SCK plus tracks, so I'm sure they're ok.
Camerart

 

Hi,
With no replies, I've decided to re-build this PCB. I've just received updated PCBs from China, so I'll swap the components from this error board to the new one.
Cheers, C