Forum Thread

Cap Identification Help!

lightsycle 282 107 March 12, 2016 at 08:41 AM
Anyone have any idea?

I would speculate them to be 680uf 4V electrolytic caps, but not sure....

http://1drv.ms/1Xl0BYS
http://1drv.ms/1Xl0Y5I

They are the same bank, just with flash and without.

Location is next to CPU, under heatsink, hence they were not seen initially.

Thanks.

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#2
Quote from lightsycle View Post :
Anyone have any idea?

I would speculate them to be 680uf 4V electrolytic caps, but not sure....

http://1drv.ms/1Xl0BYS
http://1drv.ms/1Xl0Y5I

They are the same bank, just with flash and without.

Location is next to CPU, under heatsink, hence they were not seen initially.

Thanks.
Looks like some failed 680uf 4V electrolytic caps to me as well.
If you're trying to replace them, these should work fine (http://www.badcaps.net/store/prod...ucts_id=79)

Decreasing the capacitance should be fine since polymer capacitors have lower ESR and higher ripple than electrolytic caps.
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#3
That's what I read also, but further reading lead to poly caps not having the "K" cut vents in the top, and they don't explode or leak, which these have clearly done. This lead me to believe they are not poly caps, but regular electrolyte caps.

I have never personally seen a poly cap explode. Doesn't mean they don't, just mean I have never seen it.

What would be an acceptable lessening of the values for replacements if they are poly?

That's another things also. I have no idea what their ESR or ripple current, or internal resistance values are. They are right by the CPU so I would assume there is not much margin of error.

I've never had this much trouble replacing caps. LOL Perhaps I am overthinking??? I am on Tamiflu and methlyprednasolone. :-D

Edit: Replace then WITH poly caps.... I see now.... Thanks for the link. I will look at them.
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Last edited by lightsycle March 12, 2016 at 10:57 AM
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