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UPDATE: Dell Optiplex SX260 Computer Won't Boot Up

Hi,

UPDATE:

Every 2200uf 6.3V 105 deg. odd brand/no brand electrolytic capacitor (about 12) is bad on the mother board. Regarding the brand, I see what looks like, "2DIVDK", and in another location there is a "M" in a circle.

There were no bulges in any cap, but a loss of capacitance as measured via a digital cap tester showing around 1400uf to 1500uf for these 2200/6.3 caps. Often an increase in ESR will cause a lower cap reading on this tester. My ESR meter is not useful on large capacity caps.

I will order replacements, but since I have other good working computers, I am in no hurry.

Thanks again to everyone for your replies, John

Reply to
jaugustine
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** A significant loss of uFs indicates VERY bad caps with high ESRs.

Cos ESR rises first as the electrolyte vanishes up and only later does capacitance drop.

... Phil

Reply to
Phil Allison

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