Recap a single bad cap?

[Yatti420]

Hi All,

I have an eMachines T5212 I use for Folding @ Home.. Runs Ubuntu and has had its processor downgraded to a celeron D from a pentium D.. 1GB RAM in Ultra Coolers.. Runs with a decent amount of heat.. Ultra PCI slot blower cools the hdd and northbridge... Stock Case fan & heatsink.. Artic Silver 5 used.. Last time when I was inspecting the caps I came accross a single bulging cap.. I diddn't get time to break the comp down to get brand or anything..

Should I replace a single bad cap? Is it worth it? Replace all the caps?

Thanks

[Leopard]

Re: Recap a single bad cap?

Replace the bad cap and all caps that are of the same brand on the board as the badcap is. Well, you don't have to replace the low capacity ones, but 330uF and up should be replaced.

[Yatti420]

Re: Recap a single bad cap?

They are all the same brand.. I don't think I have egnough experience to do an entire mobo.. Ill be lucky to get the 1 done properly lol.. Here is some more info.. 1 blown cap is right beside heatsink and a coil.. 1000uF 16v KZG written on the side i think.. Pics soon.. Thanks..

[Yatti420]

Re: Recap a single bad cap?

[Yatti420]

Re: Recap a single bad cap?

Heres the pic of the bad cap.. Can I just do the 3\4 caps of equivalent rating right around the processor power cord thing there?? I don't want to brick the board.. I guess I could go cap by cap slowly.... I have Sanyo WG 16v 1000uf still will these be an adequate replacement?..

[Yatti420]

Re: Recap a single bad cap?

I just purchased 3 equivalent KZG caps.. Ill probably just do the 1 and see what happens.. Have a good Christmas everybody..

[PCBONEZ]

Re: Recap a single bad cap?

WG and KZG are the same grade so WG should be fine.
KZG have problems with heat so definitely replace those near the CPU and VRM's.

[Yatti420]

Re: Recap a single bad cap?

Hmmm.. I can do the 3 inline with the KZG.. Or the 4 total with WG.. eMachines stock heatsink will get a fresh application of Artic Silver 5 which should help with heat..

[PCBONEZ]

Re: Recap a single bad cap?

Artic silver only helps get heat get from the CPU to the heatsink faster.
The heatsink is still as hot as it was before (or hotter) but the CPU is cooler.
Problem with caps is from being near a hot heatsink so Artic silver won't help caps.

At least replace all KZG near heatsink.

[Yatti420]

Re: Recap a single bad cap?

Noted about artic silver 5...

I think I will do the 3\4 around the heatsink.. My eMachines finally finished the big work unit it was on.. It was very large and took close to two months.. I pushed it on an ailing cap.. I just opened it back up and found the cap right next to it bulging at the top..



Oh well I get to do atleast two caps and hopefully not mess anything up.. I find the hardest thing is to clean the holes properly.. I've sucessfully done my dell 15" monitor and went 1 out of 2 on linksys 4 ports so far.. (the one router must of had other bricked components..)

[Yatti420]

Re: Recap a single bad cap?

I've recapped the eMachines two bad KZG caps with some fresh ones.. Suprisingly I diddn't check sizes.. The 1s I pulled were 8mm wide and around 12mm high i think.. The 1s i put in were like 10mm wide and 10mm high.. (Both KZG \ Same voltage and capcitance..)

Found a third bad cap underneath the heatsink (was poorly placed and soldered is probably touching the heatsink.. The botton looks like its ready 2 come out.. bung thingy?)

The specs on that cap look like from the same company (NCC) but different series.. TMV Series... It is 4v and 680uf.. Only 1 is blown which is covered by the heatsink..

Pic to come soon..

[Yatti420]

Re: Recap a single bad cap?



I hope this works..

Let me know if it doesnt...

Should I replace this small cap? What does it control?

The caps I replaced initially were beside the heatsink in a row (see other pic)

Do these control\regulate the voltages that the processor gets?

Can I replace the blown one with an aluminum silvery1 one beside it?

My eMachines is running again now.. Stability issues in ubuntu seem to be gone when the processor is under extreme load from protein folding..

With this many caps going so quickly should I be looking at my PSU??

Thanks..

[PCBONEZ]

Re: Recap a single bad cap?

I can't see in photo well enough to tell anything.

If it's blown you should replace it.
As you have blown KZG you should replace all of those.

As the TMV is 4v it is probably on Vcore CPU voltage.
TMV seems to be an OEM only part and there is no data table available.
You should probably replace it with a solid polymar as it -probably- is one.

Yes, suspect PSU.

[Yatti420]

Re: Recap a single bad cap?

So replace it with an identical cap? When you refer to solid polymer do you mean it has solid electrolyte? I was thinking (if possible) replace it with an aluminum one shown next to it (red writing on top...) Will these handle the heat better?

Thanks

[Yatti420]

Re: Recap a single bad cap?

Here is a closer picture (attached) ...

[PCBONEZ]

Re: Recap a single bad cap?

From what I can tell the TMV is a hybrid polymer like the red Fujitzu next to it.
Not quite a 'solid' polymer but not a 'wet' electrolyte cap either.
They have a semi-dry electrolyte.

Those don't fail very often so it's probably either a random dud cap or a PSU issue.

http://cgi.ebay.com/ws/eBayISAPI.dll...m=290213956950

[Yatti420]

Re: Recap a single bad cap?

Thats where I was looking aswell.. I will probably just recap it with the same equivalent.. I was just wondering if its possible to use a cap similiar to the red fujitsu.. All solid aluminum shell etc.. Are their any benefits?

Thanks..

[PCBONEZ]

Re: Recap a single bad cap?

The TMV and the Fujitsu are the same kind of cap.
The sleeve is only a way to mark them.

[Yatti420]

Re: Recap a single bad cap?

Ok thanks for all the info..

[Yatti420]

Re: Recap a single bad cap?

Finished with the TMV cap under the heatsink.. Everything still works so far.. Noticed another cap bulging up near the ram slots.. This one is probably due to heat as I have 2 sticks in ultra heatsinks which don't seem to work to well - probably not designed to be side by side touching.. This one I believe was 6.3v 1000uf NCC.. Im sure it was KZG series..



Ill check again tommorow..

What is the difference between KZJ 6.3 1000uF and KZG 6.3 1000uF? Pretty much appear the same.. Are they interchangeable?