Popping capacitors Who has post 2006 hardware with bad caps?

C

CheetahHugger

Guest
Just got 7 420W pc power supplies in which have all the same capacitor
1000uf 16v popped, as these were made in 2006 i am suprised, that was a
problem of the past or are there more people here that still have
trouble with capacitors?
Someone gave me 2 tft monitors which briefly show picture and then shut
off, i open those tomorrow and see if they also have bad capacitors.
I am aware of the motherboard capacitor problem but that too doesn't
happen anymore or does it?
Who sees post 2006 hardware with bad caps?

Cheetah
 
On 13 Oct, 23:07, CheetahHugger <chee...@sandiegozoo.com> wrote:
Just got 7 420W pc power supplies in which have all the same capacitor
1000uf 16v popped, as these were made in 2006 i am suprised, that was a
problem of the past or are there more people here that still have
trouble with capacitors?
Someone gave me 2 tft monitors which briefly show picture and then shut
off, i open those tomorrow and see if they also have bad capacitors.
I am aware of the motherboard capacitor problem but that too doesn't
happen anymore or does it?
Who sees post 2006 hardware with bad caps?

Cheetah
Click to expand...
Its maybe not the caps fault, maybe its a design fault ?
Maybe someone has put in wrong voltage cap ?
Maybe it cant cope with current surge at power up or later?

http://www.ckp-railways.talktalk.net/pcbcad21.htm
 
"CheetahHugger" <cheetah@sandiegozoo.com> wrote in message
news:rkbQi.117586$6L.38275@fe03.news.easynews.com...
Just got 7 420W pc power supplies in which have all the same capacitor
1000uf 16v popped, as these were made in 2006 i am suprised, that was a
problem of the past or are there more people here that still have trouble
with capacitors?
Someone gave me 2 tft monitors which briefly show picture and then shut
off, i open those tomorrow and see if they also have bad capacitors.
I am aware of the motherboard capacitor problem but that too doesn't
happen anymore or does it?
Who sees post 2006 hardware with bad caps?

Cheetah
Click to expand...
Me, just about every day of my working life ...

Arfa
 
CheetahHugger <cheetah@sandiegozoo.com> hath wroth:

Just got 7 420W pc power supplies in which have all the same capacitor
1000uf 16v popped, as these were made in 2006 i am suprised, that was a
problem of the past or are there more people here that still have
trouble with capacitors?

Someone gave me 2 tft monitors which briefly show picture and then shut
off,
Click to expand...
Hmmm.... I have a fairly new Samsung Syncmaster (something) 19" LCD on
the bench with exactly the same problem. I'll start on it on Weds and
see what I find.

i open those tomorrow and see if they also have bad capacitors.
I am aware of the motherboard capacitor problem but that too doesn't
happen anymore or does it?
Who sees post 2006 hardware with bad caps?
Click to expand...
I'm not sure of the manufacturing date, but I've been seeing them in
new +5/+12v external switching power supplies used on external USB to
hard disk enclosures. I have a few torn apart and all have volcanic
electrolytics.

I haven't seen any recently in the usual places (motherboards, power
supplies, and consumer electronics). I found a few in LCD panel power
supplies, but they were much older than 2006. To find them, ESR
meter, optical pyrometer, IR thermometer, or a really nifty IR
thermography scanner that I borrow ocassionaly. I've tried using
various digital cameras for IR and had no luck.



--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
 
There is probably some other common fault that is causing the caps to be
over stressed, or there is a design fault.

Investigate things such as the working temperature of the supply, and if
there is adequate air flow through it. Also, check the voltage across the
cap while the supply is operating.

For an experiment use a higher voltage rated cap and see what happens. If
you can squeeze a 25V cap in its place, or find a way to use 2 X 470 uF /
25V in parallel to replace if there is no space for a single at 1000 uF.
Also, make sure that the cap's temperature is rated at 105 deg Cels.



--

JANA
_____


"CheetahHugger" <cheetah@sandiegozoo.com> wrote in message
news:rkbQi.117586$6L.38275@fe03.news.easynews.com...
Just got 7 420W pc power supplies in which have all the same capacitor
1000uf 16v popped, as these were made in 2006 i am suprised, that was a
problem of the past or are there more people here that still have
trouble with capacitors?
Someone gave me 2 tft monitors which briefly show picture and then shut
off, i open those tomorrow and see if they also have bad capacitors.
I am aware of the motherboard capacitor problem but that too doesn't
happen anymore or does it?
Who sees post 2006 hardware with bad caps?

Cheetah
 
Arfa Daily wrote:

"CheetahHugger" <cheetah@sandiegozoo.com> wrote

Who sees post 2006 hardware with bad caps?

Me, just about every day of my working life ...
Click to expand...
Any particulat brands ?

Graham
 
If you can squeeze a 25V cap in its place...
Click to expand...
Yes, i can, it's just that i remember huge problems with capacitors
about 10 years ago and it seems it's still a common failure making me
think it's a weak component purposely installed to make sure the
appliance in question will only just outlast the warranty.
To me this is theft from consumers.

Cheetah
 
Any particulat brands ?
Click to expand...
On my last 2 TFT monitors teapo and jackcon, on the power supplies it's
tah-ken and fuhjyyu (fake fujitsu?).
This is on Nec, Asus and Powermaxx power supplies from which i have 7
with the same cap popped.
This does look like a design fault so i will put a higher voltage cap in .

Cheetah
 
"Eeyore" <rabbitsfriendsandrelations@hotmail.com> wrote in message
news:4711831F.DECD1217@hotmail.com...
Arfa Daily wrote:

"CheetahHugger" <cheetah@sandiegozoo.com> wrote

Who sees post 2006 hardware with bad caps?

Me, just about every day of my working life ...

Any particulat brands ?

Graham

Nope. The two main things that they always have in common, are that they are
Click to expand...
either secondary side filter caps on switchers, or located right next to a
component that runs hot. SMPS designers seem to have something programmed
into their genes, which compels them to do this ...

Arfa
 
Arfa Daily wrote:

"Eeyore" <rabbitsfriendsandrelations@hotmail.com> wrote
Arfa Daily wrote:
"CheetahHugger" <cheetah@sandiegozoo.com> wrote

Who sees post 2006 hardware with bad caps?

Me, just about every day of my working life ...

Any particulat brands ?

Nope. The two main things that they always have in common, are that they are
either secondary side filter caps on switchers, or located right next to a
component that runs hot. SMPS designers seem to have something programmed
into their genes, which compels them to do this ...
Click to expand...
LOL ! I had a similar problem with a layout guy. He loved to crowd all the hot
items together. In one case we even found that a certain power diode would after
extended operation virtually 'weld' itself into the tiny PTH he'd provided it
with.

Graham
 
"CheetahHugger" <cheetah@sandiegozoo.com> wrote in message
news:TShQi.167046$vo5.31108@fe04.news.easynews.com...
If you can squeeze a 25V cap in its place...

Yes, i can, it's just that i remember huge problems with
capacitors
about 10 years ago and it seems it's still a common failure
making me
think it's a weak component purposely installed to make sure
the
appliance in question will only just outlast the warranty.
To me this is theft from consumers.

Cheetah
Click to expand...
i think you need to factor in the product value and penny
counters as well, Cheapo mother boards were big problem once upon
a time. The mother board and other electronic mfgs are ordering
thousands and millions of components and a couple of fractions of
pennies here and there really adds up to big savings or profit
for them. I replaced some buldging caps in my old cheapie MOBO
with nichicon equivalents and the board still runs great.
 
"robb" <some@where.on.net> wrote in message
news:13h4anrr1bt6kd5@corp.supernews.com...
"CheetahHugger" <cheetah@sandiegozoo.com> wrote in message
news:TShQi.167046$vo5.31108@fe04.news.easynews.com...

If you can squeeze a 25V cap in its place...

Yes, i can, it's just that i remember huge problems with
capacitors
about 10 years ago and it seems it's still a common failure
making me
think it's a weak component purposely installed to make sure
the
appliance in question will only just outlast the warranty.
To me this is theft from consumers.

Cheetah

i think you need to factor in the product value and penny
counters as well, Cheapo mother boards were big problem once upon
a time. The mother board and other electronic mfgs are ordering
thousands and millions of components and a couple of fractions of
pennies here and there really adds up to big savings or profit
for them. I replaced some buldging caps in my old cheapie MOBO
with nichicon equivalents and the board still runs great.
Click to expand...
That said, there was a genuine issue a few years back where one (or more ??)
of the major electrolytic manufacturers had a batch of 'fake' electrolyte
swung across them, which resulted in hundreds of thousands of substandard
caps appearing on the market, and finding their way onto computer
motherboards, and failing after a relatively short period of time.
Obviously, the mo-bo manufacturers thought that they were buying full spec
caps, and the cap manufacturers thought that's what they were selling, so
not a penny-pinching situation in that case.

Arfa
 
On Sun, 14 Oct 2007 15:59:33 +0000, Arfa Daily wrote:

"robb" <some@where.on.net> wrote in message
news:13h4anrr1bt6kd5@corp.supernews.com...

"CheetahHugger" <cheetah@sandiegozoo.com> wrote in message
news:TShQi.167046$vo5.31108@fe04.news.easynews.com...

If you can squeeze a 25V cap in its place...

Yes, i can, it's just that i remember huge problems with
capacitors
about 10 years ago and it seems it's still a common failure
making me
think it's a weak component purposely installed to make sure
the
appliance in question will only just outlast the warranty.
To me this is theft from consumers.

Cheetah

i think you need to factor in the product value and penny
counters as well, Cheapo mother boards were big problem once upon
a time. The mother board and other electronic mfgs are ordering
thousands and millions of components and a couple of fractions of
pennies here and there really adds up to big savings or profit
for them. I replaced some buldging caps in my old cheapie MOBO
with nichicon equivalents and the board still runs great.


That said, there was a genuine issue a few years back where one (or more ??)
of the major electrolytic manufacturers had a batch of 'fake' electrolyte
swung across them, which resulted in hundreds of thousands of substandard
caps appearing on the market, and finding their way onto computer
motherboards, and failing after a relatively short period of time.
Obviously, the mo-bo manufacturers thought that they were buying full spec
caps, and the cap manufacturers thought that's what they were selling, so
not a penny-pinching situation in that case.
Click to expand...
IIRC Abit was one mobo manufacture that got bit by bad caps.
 
Meat Plow wrote:

Arfa Daily wrote:

That said, there was a genuine issue a few years back where one (or more ??)
of the major electrolytic manufacturers had a batch of 'fake' electrolyte
swung across them, which resulted in hundreds of thousands of substandard
caps appearing on the market, and finding their way onto computer
motherboards, and failing after a relatively short period of time.
Obviously, the mo-bo manufacturers thought that they were buying full spec
caps, and the cap manufacturers thought that's what they were selling, so
not a penny-pinching situation in that case.

IIRC Abit was one mobo manufacture that got bit by bad caps.
Click to expand...
Yes. Still not sure if it was that or a dodgy PSU of the same era that gave me
trouble.

Graham
 
Meat Plow wrote:

On Sun, 14 Oct 2007 15:59:33 +0000, Arfa Daily wrote:


"robb" <some@where.on.net> wrote in message
news:13h4anrr1bt6kd5@corp.supernews.com...

"CheetahHugger" <cheetah@sandiegozoo.com> wrote in message
news:TShQi.167046$vo5.31108@fe04.news.easynews.com...

If you can squeeze a 25V cap in its place...

Yes, i can, it's just that i remember huge problems with
capacitors
about 10 years ago and it seems it's still a common failure
making me
think it's a weak component purposely installed to make sure
the
appliance in question will only just outlast the warranty.
To me this is theft from consumers.

Cheetah

i think you need to factor in the product value and penny
counters as well, Cheapo mother boards were big problem once upon
a time. The mother board and other electronic mfgs are ordering
thousands and millions of components and a couple of fractions of
pennies here and there really adds up to big savings or profit
for them. I replaced some buldging caps in my old cheapie MOBO
with nichicon equivalents and the board still runs great.


That said, there was a genuine issue a few years back where one (or more ??)
of the major electrolytic manufacturers had a batch of 'fake' electrolyte
swung across them, which resulted in hundreds of thousands of substandard
caps appearing on the market, and finding their way onto computer
motherboards, and failing after a relatively short period of time.
Obviously, the mo-bo manufacturers thought that they were buying full spec
caps, and the cap manufacturers thought that's what they were selling, so
not a penny-pinching situation in that case.


IIRC Abit was one mobo manufacture that got bit by bad caps.
Click to expand...
I have one of those Abits. I tried to replace them but the local elctronics
dealer(central Canada) wanted $40.00 for 20 caps. (I could replace the MoBo for
that price, its outdated anyway and I just wanted to try replacing the caps for
the heck of it). I am waiting to find a more reasonable seller with decent prices.



--
to reply remove STOP from email addy
 
Yeah,

But i am currently looking over a pile of scrapped items i took from a
local computer shop, including about 50 power supplies and 2 tft
monitors, and several complete computers fairly late, amd athlon mainly,
who have all in common that they are discarded because of bad caps.
The problem the previous poster mentioned is true here as well, they
want up to 1 euro for just 1 capacitor, so i solve that by salvaging
dead mainboards for their caps to replace the bulged ones.
Unless someone knows a good supplier for 105° caps suitable for computer
who has no objection to ship to or is located in europe.
Any suggestions, i would like 1000 or such of each common number.

Cheetah
 
CheetahHugger wrote:
Yeah,

But i am currently looking over a pile of scrapped items i took from a
local computer shop, including about 50 power supplies and 2 tft
monitors, and several complete computers fairly late, amd athlon mainly,
who have all in common that they are discarded because of bad caps.
The problem the previous poster mentioned is true here as well, they
want up to 1 euro for just 1 capacitor, so i solve that by salvaging
dead mainboards for their caps to replace the bulged ones.
Unless someone knows a good supplier for 105° caps suitable for computer
who has no objection to ship to or is located in europe.
Any suggestions, i would like 1000 or such of each common number.

Cheetah
Click to expand...

Rapid Electronics
http://www.rapidonline.com
I believe that they will ship to mainland Europe


Ron(UK)
 
I bought a bag of 30 1500 ľF 6.3V nichicon 105° caps from China on
Ebay. The caps were $10.99 and shipping to Sweden $5.99.

Here is one such auction:
http://cgi.ebay.com/1500-uf-6-3v-105C-motherboard-capacitors-30pcs_W0QQitemZ220159080828QQihZ012QQcategoryZ1244QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

They shipped quickly, ~1 week, and the price is very reasonable.

I have no affiliation with them, other than I'm a happy customer.

I have also bought LED:s from another chinese vendor, and I'm very
happy with these as well.
 
Thanks for the info. Sounds like reasonable prices. I will give them a call.

regards
hg

Thomas Tornblom wrote:

I bought a bag of 30 1500 ľF 6.3V nichicon 105° caps from China on
Ebay. The caps were $10.99 and shipping to Sweden $5.99.

Here is one such auction:
http://cgi.ebay.com/1500-uf-6-3v-105C-motherboard-capacitors-30pcs_W0QQitemZ220159080828QQihZ012QQcategoryZ1244QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

They shipped quickly, ~1 week, and the price is very reasonable.

I have no affiliation with them, other than I'm a happy customer.

I have also bought LED:s from another chinese vendor, and I'm very
happy with these as well.
Click to expand...
--
to reply remove STOP from email addy
 
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