On Friday, November 15, 2019 at 4:45:16 AM UTC-5, Cursitor Doom wrote:
On Thu, 14 Nov 2019 18:32:29 -0800, John-Del wrote:


If so, the first thing to get checked is the electros. I pull every one
and test them for value, ESR, and dielectric absorption. Testing ESR in
circuit on many modern circuit boards is a waste of time.

Why so?


Too many circuits these days use a small value SMD multi layer chip capacitor bypassing an electrolytic. These chip caps have ESR figures as low or lower than most electrolytics you're likely to run across despite being small value caps.