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 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

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" wrote in message
. ..
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

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

Arfa

CheetahHugger 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,

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?

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
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" wrote in message
. ..
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" wrote

Who sees post 2006 hardware with bad caps?

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

Any particulat brands ?

Graham

JANA wrote:

Also, make sure that the cap's temperature is rated at 105 deg Cels.

Were there never any 105C 'bad caps' ?

Graham

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

Any particulat brands ?

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" wrote in message
...


Arfa Daily wrote:

"CheetahHugger" 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
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" wrote
Arfa Daily wrote:
"CheetahHugger" 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 ...

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" wrote in message
...

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.

"robb" wrote in message
...

"CheetahHugger" wrote in message
...

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.

Arfa

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.

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" wrote in message
...

"CheetahHugger" wrote in message
...

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.

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


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


Ron(UK)

I bought a bag of 30 1500 µF 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-105...QQcmdZViewItem

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 µF 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-105...QQcmdZViewItem

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.

--
to reply remove STOP from email addy

Thomas Tornblom wrote:

I bought a bag of 30 1500 µF 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-105...QQcmdZViewItem

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.

The vendor didn't state they were Nichicon though. Seeing as they come from China, I'd be suspicious of their potential origin.

Graham

Hello,

I would doubd their quality too, however i will buy some to test.
Thanks to everybody for the input.

Cheetah

Rapid Electronics

But they don't have motherboard caps, only normal 10mm ones.

Cheetah

CheetahHugger wrote:

Rapid Electronics

But they don't have motherboard caps, only normal 10mm ones.

You're confusing size with application.

Graham

Eeyore wrote:

CheetahHugger wrote:

Rapid Electronics
But they don't have motherboard caps, only normal 10mm ones.

You're confusing size with application.

It aint the meat, it`s the motion

"Arfa Daily" wrote in message
...

"robb" wrote in message
...

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.

Arfa

i just happened to find a bag of those buldging caps they were ?
LUXON ?
6.3v 105°

i don't know about the usual quality of LUXON caps though

robb

robb wrote:
"Arfa Daily" wrote in message
...
"robb" wrote in message
...
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.

Arfa

i just happened to find a bag of those buldging caps they were ?
LUXON ?
6.3v 105°

i don't know about the usual quality of LUXON caps though

robb

I just recapped the power supply of a Cyberhome DVD recorder
(manufactured 2005?). It's a pretty nice unit that I got for next to
nothing ($25). Two 2200 mf caps were bulged. The unit was exhibiting
lots of strange behaviors; display scrambled, erratic remote
operation...and finally complete failure to function at all.

OTOH, I expected all of this based on web research of the unit. This
particular unit (DVR 1600) has some pretty well-documented shortcomings.
It also has some pretty neat features, reasonable performance, and can
be had for a song.

In addition, I heatsinked the regulators on the board (one even had a
silkscreened outline of a heatsink on the board, but none installed),
and added a cooling fan. I think the fan might have been overkill--the
real problem being the result of only *10v* rating on the original caps,
but better safe.....

It's now working like a champ. I'd like to find a BIOS upgrade for it,
but I haven't located the download. Cyberhome is defunct--no factory
support--but reportedly there is a later version.

jak

jakdedert wrote:

Two 2200 mf caps were bulged.

mF ? You mean it has 2.2 FARADS of smoothing ?

Do please use the correct terms. I assume you mean 2200 uF.

m = milli = 1/1000

Graham

Eeyore wrote:

jakdedert wrote:

Two 2200 mf caps were bulged.

mF ? You mean it has 2.2 FARADS of smoothing ?

Do please use the correct terms. I assume you mean 2200 uF.

m = milli = 1/1000

Graham


Wow! You figured it out. I wonder if anybody else did?

Thanks for the spelling flame....

jak

CheetahHugger wrote:
Any particulat brands ?

On my last 2 TFT monitors teapo and jackcon, on the power supplies it's
tah-ken and fuhjyyu (fake fujitsu?).

Fuhjyyu isn't fake Fujitsu. I may be wrong, but I believe Fujitsu
makes only solid caps now.

Why does Fuhjyyu use the round Hitachi symbol?

In article ,
CheetahHugger writes

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.

RS Components, http://rswww.com

Farnell, www.farnell.com

Both located in UK and will ship to mainland Europe. I have used both
to obtain caps for motherboards (including hard-to-find 1200uF and
1800uF ones.)

--
(\__/) Bunny says NO to Windows Vista!
(='.'=) http://www.cs.auckland.ac.nz/~pgut00...ista_cost.html
(")_(")

Mike Tomlinson schreef:
In article ,
CheetahHugger writes

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.

RS Components, http://rswww.com

Farnell, www.farnell.com

Both located in UK and will ship to mainland Europe. I have used both
to obtain caps for motherboards (including hard-to-find 1200uF and
1800uF ones.)


Thanks, that should solve my problem

Cheetah