what caps? I would not just go shot gunning them, most are prob ok. Maybe the can caps, but then again, often they are fine, esp if you started it easy (unless it had been in service recently).
The down side of a PCB is the breakage factor, the upside is with a good solder sucker iron you can quickly replace parts very neatly.
On those I generally lift one leg of a suspect cap (low volt, high value and any non dipped caps) and check with an old school cap tester (can test at rated voltage for leakage).
Same for can caps, disconnect and check with cap tester. Lately I have found a lot of the can caps test just fine, so I leave them be. I also fuse the B+ with a fast acting fuse that is just a bit over the rated current draw. That way if for some reason a cap does short the fuse will blow.
Of course for complete peace of mind it does not hurt to replace all the filter caps, I just like to introduce as few changes as possible, until I have a working set. Then go and replace old working parts (like can caps) if you feel new ones are better. With the way some new caps go bad, I am not as sure as I used to be that is the case
