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Topic: Capacitor plague

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	Capacitor Information - flux capacitor
		Capacitors are connected in doorknob capacitor parallel ultra capacitor with the power circuits of most electronic 75pf 100pf variable capacitor devices and larger systems (such as factories) to shunt away and conceal current fluctuations from the primary power source to provide a "clean" power supply for signal or control circuits.
		Capacitors are also used in parallel to interrupt units of a high-voltage circuit breaker in order to distribute the voltage between these units.
		Capacitors are used as the transducer in condenser microphones.
	www.inanot.com /Ina-Electronics_Topics_C_-_Cm-/Capacitor.html (2676 words)

	Capacitor plague - Wikipedia, the free encyclopedia
		The Capacitor plague (also known as Bad Capacitors, Bad Caps or Bloated Capacitors) involved the common premature failure of certain brands of electrolytic capacitors used in various electronics equipment, and particularly in motherboards, video cards, CF bulbs, and power supplies of personal computers.
		The second theory is that as the capacitance decreases and the ESR increases, the buck controller for the voltage regulator increases the switching frequency to compensate for the load.
		Capacitors removed from a computer power supply were found to have dramatically less capacitance than their rated values.
	en.wikipedia.org /wiki/Capacitor_plague (1749 words)

	Capacitor Summary
		A capacitor is a device that stores energy in the electric field created between a pair of conductors on which electric charges of equal magnitude, but opposite sign, have been placed.
		Since the voltage across a capacitor is the integral of the current, as shown above, with sine waves in AC or signal circuits this results in a phase difference of 90 degrees, the current leading the voltage phase angle.
		Capacitors are commonly used to supply energy to electronic devices without the memory being lost when changing their batteries.
	www.bookrags.com /Capacitor (4757 words)

	ASTi Application Note 65: "Capacitor Plague" Remediation
		Capacitor Plague is when a flawed electrolytic capacitor prematurely deteriorates and dries up.
		Capacitor manufacture and model number, Nichicon HN (M) Note that no other model capacitors under this manufacturer are affected.
		In fact, the use of these defective capacitors has been so pervasive that we suggest that you check all of the KVM switches, routers, and power supplies in your trainer and then if incipient capacitor breakdown is observed, contact the vendor to see if they also have instituted a remediation procedure.
	www.asti-usa.com /support/appnotes/65.html (1798 words)

	Capacitor plague
		Capacitor plague is an informal term used to reference the common premature failure of certain brands of electrolytic capacitors used on some motherboards, video cards, and power supplies.
		However, once the problems with these capacitors became known, there is evidence that motherboard manufacturers continued to use the bad capacitors, despite knowing they would certainly fail in a short time span.
		Any motherboard with these brands of capacitors is very likely to fail prematurely, and due to the possibility of bad capacitors damaging other components, a preemptive replacement of the capacitors is sometimes advisable.
	www.mrsci.com /Motherboard/Capacitor_plague.php (1677 words)

	Capacitor (Site not responding. Last check: 2007-10-10)
		A 'capacitor' is a device that stores energy in the electric field created between a pair of conductors on which equal but opposite electric charges have been placed.
		The capacitance of a parallel-plate capacitor is given by: : $C \approx \frac; A >> d^2$ where andepsilon; is the permittivity of the dielectric, 'A' is the area of the plates and 'd' is the spacing between them.
		In AC or signal circuits a capacitor induces a phase difference of 90 degrees, the current leading the voltage phase angle.The energy stored in a capacitor can be used to represent information, either in binary form, as in computers, or in analogue form, as in switched-capacitor circuits and bucket-brigade delay lines.
	wiki-shorts.freestat.pl /23-1936-Capacitor.html (2045 words)

	Reliability
		The expected life of a film capacitor is dependent on a number of factors, which generally apply to paper-oil capacitors as well.
		SMD ceramic capacitors are strong but brittle, and this makes them susceptible to failure during soldering and from temperature cycling, due to miss-match between the temperature coefficient of linear expansion of the capacitor and that of the board.
		Large axial-leaded electrolytic capacitors have problems with leads breaking from vibration and must be held down with glue or a cable tie.
	my.execpc.com /~endlr/reliability.html (3548 words)

	Geek.com Geek News - Capacitor failures plague motherboard vendors (Site not responding. Last check: 2007-10-10)
		It appears that all of the capacitors on the board manufactured by Lelon are either leaking or are bulging.
		It worked fine and even better than that, when another one of the 4700muF capacitors exploded recently, I didn't have to replace it since the large capacitance of that 10K beast seems to be sufficient to compensate for it.
		I have an EPOX 8K9A rev 1.0 with man many GSC capacitors on it and the 10v 2200uf capacitor near the ATX connector is bulging and oozing so this probably is the cause of the bizarre lockups and errors I've been having.
	www.geek.com /news/geeknews/2003Feb/gee20030207018535.htm (10239 words)

	Poor Power Quality Can Plague Process Industry Drives
		During normal operation, the input voltage to a drive is balanced and the diodes in the bridge rectifier are symmetrically forward-biased.
		The capacitor will continue to discharge until there is an input voltage peak that is high enough to forward-bias the diodes.
		Voltage-source PWM drives use a DC capacitor to smooth the rectified line voltage and act as an energy source for the inverter section of the drive, explain Bernahrdt and Glickman.
	www.controlglobal.com /articles/2004/205.html (2041 words)

	Capacitor Plague - Slider
		Failing capacitors are mostly associated with some Pentium III motherboards, however some older Socket 7 motherboards and newer Pentium IV and Athlon boards also suffer from them.
		The fact that these failure-prone capacitors are still being used has angered many people, especially in cases where a motherboard populated entirely with good brand capacitors has one or two of the bad capacitors on it, leading to speculation of planned obsolescence on the part of motherboard manufacturers.
		While failing capacitors typically results in the aforementioned system instabilities, occasionally a capacitor fails such as to form a short circuit, frequently destroying the motherboard's onboard voltage regulators or the system's power supply.
	enc.slider.com /Enc/Capacitor_Plague (1495 words)

	Badcaps Forums - Aopen MX36LE
		Jackcon (The only capacitor manufacturer to own up to their mistake; they are also the only one to issue free replacement capacitors to people who had theirs fail.
		If you have a motherboard with any of these capacitor brands, there is a good chance it may fail prematurely.
		Typically, only the capacitors over 480uf fail, since the lower capacitance ones are usually made with a different electrolyte.
	www.badcaps.net /forum/printthread.php?t=641 (1026 words)

	Plague (Site not responding. Last check: 2007-10-10)
		For general discussion of the disease known as plague, see bubonic plague and yersinia pestis.
		For the specific outbreak of Plague in the Middle East during the sixth century see Plague of Justinian.
		For the specific outbreak of Plague in Asia during the late nineteenth century, see Third Pandemic.
	plague.iqnaut.net (124 words)

	My caps are backwards \| MetaFilter
		Bad capacitors are also one of the main reasons laptop power supply bricks fail.
		According to wikipedia, electrolytic capacitor can refer to both the tantalum and aluminum varieties, but in my experience the term has always implied the later.
		While tantalum capacitors are also electrolytic, as far as I can tell they are always referred to specifically as tantalum capacitors.
	www.metafilter.com /mefi/50166 (1039 words)

	Sudhian Forums \| Why do motherboard capacitors blow up?
		Defective capacitors found in the Dell Optiplex workstations, some Apple iMac G5s, HP xw-series workstations made in 2004 and PCs with the Intel D865GBF motherboard have been found to bulge, pop, leak and crust over, causing video failure and periodic system shutdowns.
		Various postings on message boards claim the trouble was caused by capacitors that were overfilled with a liquid electrolyte that helps the component protect the processor from excess power; convert energy from 5 volts to around 1.5 volts; and deal with current surges.
		I can buy all sorts of makes and models of capacitors from one of my suppliers, yet non of those components are inferior and subsequently they no doubt cost far more than what motherboard manufacturers pay and that’s not just to do with massive bulk buying either.
	www.sudhian.com /index.php?/forums/viewthread/94651 (1159 words)

	computergeeks: Life expectancy of motherboards
		These capacitors exhibit aging effects which depend on the temperature of the parts, since their water based electrolytes slowly evaporate leading to capacity loss and motherboard malfunctions due to voltage instabilities.
		While most capacitors are rated for 2000 hours at 105 degrees Celsius (life formula [1]), their expected design life roughly doubles for every 10 degrees Celsius below this.
		For more information on certain types of premature capacitor failure on PC motherboards, see capacitor plague.
	community.livejournal.com /computergeeks/987698.html (276 words)

	Dell unearths faulty capacitors on motherboards (Site not responding. Last check: 2007-10-10)
		THE MIGHTY DELL has admitted that some of its systems may be have been afflicted by the plague of capacitor faultiness sweeping the wired world.
		The INQUIRER reported back in October 2002 that a number of Taiwanese component firms were fiddling with an electrolyte used in capacitors.
		Their fiddling was inept, causing capacitors to bulge and bubble like eggs in a frying pan.
	www.theinquirer.net /?article=24596 (431 words)

	Plague - Wikipedia, the free encyclopedia
		The Black Death, also known as The Black Plague, the 14th century pandemic thought to have been caused by bubonic plague, and its reprises until the 18th century
		Capacitor plague, a condition afflicting computer motherboards in which capacitors fail
		Plague (wrestler), the stage name of a U.S. professional wrestler
	en.wikipedia.org /wiki/Plague (206 words)

	Why must you shutdown, XP? \| Ask MetaFilter
		The visual signs of Capacitor Plague can be very subtle.
		Also, fixing a system by power supply replacement can be an early indicator capacitors which are begriming to deteriorate.
		On the other hand, capacitor plague is my favorite suggestion for all seemingly hardware related computer problems, so..
	ask.metafilter.com /mefi/38620 (2003 words)

	Welcome to Badcaps.net!
		This site was created to counter the bad capacitor problem that has been plaguing computer motherboards since about 1999 to the present day.
		The tale behind why the capacitor problem exists in the first place is because of a large-scale industrial espionage foul-up.
		Over the years, there have been massive quantities of name-brand, high quality motherboards failing prematurely due to these faulty electrolytic capacitors used in their manufacturing process.
	www.badcaps.net (612 words)

	Incapacitation :: Jasongraphix
		Apparently those faulty capacitors are the primary reason for the extension program, even thought it doesn’t say that anywhere on the site.
		If any of the capacitors on your motherboard are bulging or leaking, take it in immediately.
		If none of the capacitors are bulging or leaking you should be in the clear.
	www.jasongraphix.com /archive/2006/10/incapacitation (929 words)

	Badcaps.net - How to identify bad capacitors (Site not responding. Last check: 2007-10-10)
		However, if your capacitors look like the ones displayed in the photo's, you can be 100% sure that any system trouble you're having is capacitor-related!!!
		You may also notice that the capacitor isn't sitting flush to the board.
		The bases of good capacitors will be sitting flush to the board, and the cap should be at a near perfect 90 degree angle (perpendicular) to the actual PCB (
	www.badcaps.com /ident (695 words)

	Gray Screen of Death :: Jasongraphix
		It may have been due to bad capacitors on the motherboard.
		The first generation of G5 iMacs were subject to a bad batch of capacitors that were prone to bulge and leak causing a while host issues including video and power outtages, and in my case kernel panics.
		Turns out I was experiencing the capacitor plague.
	www.jasongraphix.com /archive/2006/07/gray_screen_of (1462 words)

	Tripe Soup
		Tripe Soup has been out of action for a while as my imac g5 has been repaired.
		The whole midplane of the computer had to be replaced as it was suffering from bulging capacitors.
		It appears that the early Imac g5's are prone to overheating, so I will have to be cautious using this computer during heatwaves.
	andyfarnsworth.blogspot.com (1328 words)

	Matthew Exon's Photos :: Capacitor Plague (Site not responding. Last check: 2007-10-10)
		The green capacitors on the left are OK. Only the fl capacitors have failed.
		Closeup of the domed top of one of the capacitors.
		Yes, my computer is quite dusty, but the flash makes it look worse than it is.
	exon.dyndns.org /gallery/badcaps (52 words)

	Computer Reboots? - CNCzone.com-The Ultimate Machinist Community
		Just had a memory epiphany, pop the cover and take a close look at ALL of the capacitors on the motherboard to see if any are buldged, leaking or have burst.
		If so, your motherboard suffers from "capacitor plague" or "burst-capacitor syndrome".
		I saw quite a few failed motherboards due to this problem several years ago and forgot about it until I re-read your initial post about the Compaq Presario 600 Mhz PC with an Intel Celeron uProcessor (from several years ago, hello!).
	www.cnczone.com /forums/showthread.php?t=24140 (2716 words)

	Digital Potentiometers Enable Programmable Biquadratic Filter - Maxim/Dallas
		And, because monolithic switched-capacitor filters are usually expensive, the biquad circuit of Figure 1 may not represent an increase in cost.
		Noise and low bandwidth plague switched-capacitor filters, but biquad filters can operate at higher frequencies, as they are not limited by capacitor switching speed.
		The biquad filter of Figure 1 maintains less than 1% THD+N over the 20Hz to 200kHz range.
	www.maxim-ic.com /appnotes.cfm?an_pk=3332 (521 words)

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