Other than checking for obvious shorts and opens,
what's a good way to
check a (safely discharged) capacitor for such problems?
Am EDR meter. Electrolytics tend to dry out, at which point the
effective series resistace increases (and the cap is then pretty useless
for most applciations) but the capacitance value doesn't change much (so
you'll not spot it with a capacitance meter).
If you repair monitors, SMPSUs, or the like, you need an ESR meter. Period.
-tony