Check your smoothing caps again, There is one cap that if you look at the polarity is confusing on the pcb.

also keep in mind cap goo could still be under something so squirting the smoothing area down with IPA 91%

i use these bottles from ebay all the time to apply my Flux / IPA / Acetone    love em!

http://www.ebay.com/itm/Two-1-OZ-bottles-with-stainless-steel-needle-tip-dispenser-for-Flux-/111004315495?pt=LH_DefaultDomain_0&hash=item19d85f6f67