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Hmmm... It really depends on the circuit the capacitor is in. If it's in a situation where there are no parallel capacitors or other components, then it's possible to check them with an ESR meter. But most capacitors are across the power rails, which means the meter will be put off by all the other capacitors so really the best bet is to remove them and test them out of circuit.
If you're removing them though, you might as well just replace them - SMT capacitors in any Amiga need to be replaced at this stage if they're still the original factory-fitted ones. If they haven't failed yet, they will soon.
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