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-   -   The Hall of Shame - Badcaps Photo Montage (https://www.badcaps.net/forum/showthread.php?t=424)

ratdude747 09-16-2012 03:11 AM

Re: The Hall of Shame - Badcaps Photo Montage
 
^ SHT... hmm... Missing an "I" in that series name. :D

(mod note- the pics were uploaded in a quasi-duplicate thread. Not off-site. Also, the thread was a quasi-dupe and it was soft-deleted to preserve the attachments)

jm20101 09-16-2012 03:20 AM

Re: The Hall of Shame - Badcaps Photo Montage
 
2 Attachment(s)
Here some more failed KZG series
http://www.badcaps.net/forum/attachm...1&d=1347787145
http://www.badcaps.net/forum/attachm...1&d=1347787145

Pentium4 09-24-2012 06:21 PM

Re: The Hall of Shame - Badcaps Photo Montage
 
1 Attachment(s)
3 dead Ruby's on an Intel mobo :( I'm betting it's cause of the failed CapXon's that were in the SPI PSU powering the computer...

Wester547 09-24-2012 08:44 PM

Re: The Hall of Shame - Badcaps Photo Montage
 
What series were those Rubycons? If they're MBZ or MCZ, I believe, an overabundance of heat and ripple from the PSU definitely did away with them.

Pentium4 09-24-2012 11:57 PM

Re: The Hall of Shame - Badcaps Photo Montage
 
Quote:

Originally Posted by Wester547 (Post 269102)
What series were those Rubycons? If they're MBZ or MCZ, I believe, an overabundance of heat and ripple from the PSU definitely did away with them.

I'm pretty sure I chucked the motherboard at work but if my memory serves me right, they were MCZ, definitely one of the 2. Is that a lower end of Rubycon? Cause I was under the impression that they don't have a single bad series like KZG for UCC

Wester547 09-25-2012 12:06 AM

Re: The Hall of Shame - Badcaps Photo Montage
 
No one knows for sure but there has been a scary trend of Rubycon MBZ/MCZ failures on well designed motherboards and systems reported on this forum. Some suspect they're sensitive to heat and no one knows if the electrolyte is unstable or not in them but others think they just die from bad PSUs.

Pentium4 09-25-2012 12:39 AM

Re: The Hall of Shame - Badcaps Photo Montage
 
Quote:

Originally Posted by Wester547 (Post 269173)
No one knows for sure but there has been a scary trend of Rubycon MBZ/MCZ failures on well designed motherboards and systems reported on this forum. Some suspect they're sensitive to heat and no one knows if the electrolyte is unstable or not in them but others think they just die from bad PSUs.

Yeah, I would guess it was the PSU. I can't tell you how many PSU's I see here at work that have bad caps. The most common failures I see are CapXon, YC, Teapo in that order

herita 09-26-2012 08:49 AM

Re: The Hall of Shame - Badcaps Photo Montage
 
:violin:

wao, so today, i have my friend came in with his monitor, this is one 2232BW, what a beautiful out of mode LCD. And his monitor has a problem of turning off automatically in every 30minutes. ok, so i first thought that it can because of extra heat, but nope, there are plenty of bad boys inside

:lolsign:

here some pics of bad boys :duh:

[IMG]http://img826.**************/img826/9688/img2431resize.jpg[/IMG]

25v ?, humh
[IMG]http://img24.**************/img24/9355/img2430resize.jpg[/IMG]

25v everywhere ...
[IMG]http://img39.**************/img39/2032/img2429resize.jpg[/IMG]

:eek:
[IMG]http://img138.**************/img138/2236/img2428resizeg.jpg[/IMG]


have a nice day, everybody :)

momaka 09-26-2012 09:15 PM

Re: The Hall of Shame - Badcaps Photo Montage
 
Quote:

Originally Posted by Pentium4 (Post 269070)
3 dead Ruby's on an Intel mobo :( I'm betting it's cause of the failed CapXon's that were in the SPI PSU powering the computer...

The more likely cause for their death is those regulators right next to them because they probably run quite hot. I don't know how well Intel designs their boards, but the Foxconn boards in the older Pentium 4 era Dells always have at least 1 or 2 burning-hot MOSFETs somewhere.

Quote:

Originally Posted by Wester547
What series were those Rubycons?

With that color, probably MCZ.
MCZ are good series but they can't stand the very high heat in those small form factor "mini-oven" computers. The only brand that can is Panasonic.
On the other hand, Chemicon KZG and KZJ seem to fail sometimes even without much stress.

Wester547 09-26-2012 09:20 PM

Re: The Hall of Shame - Badcaps Photo Montage
 
Which MOSFET did you feel getting hot in a Dell Dimension motherboard from Foxconn/Intel? I don't know why they'd be so hot in a desktop that's doing nothing but idling.

ben7 09-27-2012 05:41 AM

Re: The Hall of Shame - Badcaps Photo Montage
 
Quote:

Originally Posted by Wester547 (Post 269817)
Which MOSFET did you feel getting hot in a Dell Dimension motherboard from Foxconn/Intel? I don't know why they'd be so hot in a desktop that's doing nothing but idling.

The PSU's usually have LTEC caps in them. (at least the delta-made PSUs do)

brundish 09-27-2012 07:22 AM

Re: The Hall of Shame - Badcaps Photo Montage
 
3 Attachment(s)
Failed 3300/6.3 Chemicon KZG caps on a rather elderly (2003) Asrock K7S8X that is about to be the subject of my first attempt at repairing. Thought I'd post a picture for posterity's sake in case it all goes tits up...

Shocker 09-27-2012 07:28 AM

Re: The Hall of Shame - Badcaps Photo Montage
 
If the small black caps are KZJs, replace them too.

brundish 09-27-2012 07:35 AM

Re: The Hall of Shame - Badcaps Photo Montage
 
Quote:

Originally Posted by Shocker (Post 269887)
If the small black caps are KZJs, replace them too.

Thanks.

They're 1000/6.3 TMZs, the green caps are 1500/6.3 KZEs. All look (visibly) OK, I was going to take my chances and just replace the four KZGs...

Shocker 09-27-2012 07:45 AM

Re: The Hall of Shame - Badcaps Photo Montage
 
TMZs also have the problem; KZEs don't.

Pentium4 09-27-2012 10:00 AM

Re: The Hall of Shame - Badcaps Photo Montage
 
Quote:

Originally Posted by momaka (Post 269816)
The more likely cause for their death is those regulators right next to them because they probably run quite hot. I don't know how well Intel designs their boards, but the Foxconn boards in the older Pentium 4 era Dells always have at least 1 or 2 burning-hot MOSFETs somewhere.


With that color, probably MCZ.
MCZ are good series but they can't stand the very high heat in those small form factor "mini-oven" computers. The only brand that can is Panasonic.
On the other hand, Chemicon KZG and KZJ seem to fail sometimes even without much stress.

And they still lasted a while. It had a Pentium Dual Core in it. It was heavily used for about 5 years, and now that I think about it the case it was in didn't have an exhaust fan and it's a tiny ATX case :angry:

brundish 09-27-2012 10:06 AM

Re: The Hall of Shame - Badcaps Photo Montage
 
Quote:

Originally Posted by Shocker (Post 269891)
TMZs also have the problem; KZEs don't.

OK, thanks again for the info.

If replacing the KZGs goes well I'll replace all (13) of the TMZs...

Wester547 09-27-2012 11:25 AM

Re: The Hall of Shame - Badcaps Photo Montage
 
Quote:

Originally Posted by ben7 (Post 269870)
The PSU's usually have LTEC caps in them. (at least the delta-made PSUs do)

Oh, I understand how ripple from aging and subpar PSU caps can heat up a motherboard.... sorry, I didn't mean to sound short with anyone. Yes, though, to my knowledge, those Dell Newton Powers do have some Ltec and Rubycon in them, though I believe the much older ones are mostly Nichicon and/or Taicon and Chemicon.

momaka 09-27-2012 08:30 PM

Re: The Hall of Shame - Badcaps Photo Montage
 
Quote:

Originally Posted by Wester547 (Post 269817)
Which MOSFET did you feel getting hot in a Dell Dimension motherboard from Foxconn/Intel? I don't know why they'd be so hot in a desktop that's doing nothing but idling.

The Dell computers I saw this in weren't from the Dimension line.
One is an Optiplex GX270. The other is actually 2x Dell Optiplex 170L. IIRC, the GX260 motherboards are very similar to the GX270 ones, so they probably have the same problems. The 170L boards look more like the ones found in the Dimension so the Dimension line may be affected as well. IMO, Foxconn screwed up on the design - for the low-power rails on the motherboard, they are using MOSFETs in a linear fashion for the most part, which is highly inefficient. Either that, or they designed it properly but not up to the task for the load they were going to carry.

I also have a Dimension 3000 at home. Will check that to see if anything runs hot.
In any case, it's not the power supplies in these that are causing the problem. In fact, dirty power from a bad power supply rarely causes VRMs or MOSFETs to overheat.

Wester547 09-27-2012 08:56 PM

Re: The Hall of Shame - Badcaps Photo Montage
 
I do think that dirty power from a power supply can cause capacitors to receive more ripple and run hotter at load (along with hard drives), though... at least that may be the case when we're talking about 10+ year old Dell Newton Power/Delta PSUs with LTECs in them.


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