Kris,
Whilst I agree with the reply from Werner about scrapping the boards (what
reliability do you need in the field?), sometimes you're pressurised to use
the product against your better judgement. If you do need to sort the good
from the bad, I have found that some poorly processed via holes can be
detected with a simple X Ray inspection set-up.
The boards need to be tilted back to about 45 degrees to the X ray beam and
you can then see the barrel plating. Look for inconsistencies along the
length of the barrels.
It will not be quick, but it is non-destructive.
Good luck
Regards
Eric Dawson

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