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Message: <blockquote data-quote="JimJ" data-source="post: 5591977" data-attributes="member: 555251">A DMM isn't going to tell you much about an electrolytic cap, you can test for shorts, leakage, if it's holding a charge, etc...but to really test it you'd need an ESR meter, or at least an LCR meter. An LCR meter is handy to have, but ESR meters aren't really common unless you're doing production work and have a need for that info constantly.4 years is well within the lifespan of an electrolytic, especially if you've used it during that time. The enemy of caps is sitting for years and years without any use, but even then, 4 years wouldn't be enough time to really dry up the dielectric.</blockquote>

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