On Thu, 2003-08-07 at 09:35, Douglas Kojetin wrote: > 2. computer boot problems. i broke down and took the computer into the > shop. it turns out more than 10 capacitors (i think they were > capacitors) were blown on the motherboard. anyone know what would cause > that to happen, other than perhaps a nuclear explosion?
Had the exact same thing happen here with a bunch of Compaq Celeron machines. Apparently, there was a huge batch of bad capacitors sold to the motherboard manufacturers, bad electrolyte or something. These caps have a problem with bulging, leaking and/or exploding. Our pc's were re-booting intermittently or not starting at all. Long story short: A Compaq service tech informed us of a capacitor problem on many of the motherboards he worked on, after opening a few cases we found bulging leaky caps. "Tayeh" is the brand name on these caps, but I hear "Jackcon" caps also have problems. Fortunately, we just had a little leakage at the top of the caps, so there was no damage/short circuit from the electrolytic fluid. After ordering 200 1500 microfarad, 10v caps from digikey.com (at around $.50 each in qty > 199) and a little soldering work with my (ESD safe) soldering iron, we now have 5 working (been tested continuous for 48 hours now) PC's again. Now just 15 more to go... If you have these bad capacitors on your motherboard, you should get them replaced as soon as possible. If the fluid leaks out on to the circuit board it could cause a short circuit and cause more damage, probably not easily repaired... Find someone with *some* soldering skills (if you don't); its not a difficult job, but a small screw-up could render your board useless. Hope this helps! --mike Here is some additional info: http://www.reed-electronics.com/electronicnews/index.asp?layout=article&articleid=CA255062&rid=0&rme=0&cfd=1
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