On 19 June 2016 at 20:28, William Harrington <[email protected]> wrote: > On Fri, 17 Jun 2016 22:35:42 +0100 > Richard Melville <[email protected]> wrote: > >> > On 15 June 2016 at 02:11, Bruce Dubbs <[email protected]> wrote: >> > > >> >> I talked to some techs today and thy said it was probably a capacitor >> >> problem in the power supply. If disconnected for an extended time, they >> >> lose some of their properties. Most power supplies have some sort of >> >> trickle current even when powered off. They said I should probably >> >> replace >> >> the power supply, but that would probably cost more than the whole system >> >> is >> >> worth. >> > >> (message resent owing to reception failure) More specifically, from >> experience, I suspect that it's an electrolytic capacitor at fault; >> they're nasty, leaky things and are >> very common, particularly in power supplies. They're generally used >> for smoothing and noise reduction. When they fail it is often >> possible to see signs of bulging, discolouration, or electrolyte >> leaking from the capacitor casing. If you have the time you could >> open the power supply and replace the faulty component. That would be >> the cheapest option, neglecting the time taken, of course. >> >> Bear in mind though that they do hold a charge. I remember from my >> time working in labs that some technicians thought it a good idea to >> charge large electrolytic capacitors and then leave them lying >> innocently on the work bench for some unwary person to pick up :-) >> >> Richard > > Hello Richard, > > Aaediwen and I had some fun about 10 years ago: > http://clfs.org/~kb0iic/Cap_Short.MPG > Impressive!
> Also, as far as capacitors and motherboards, there was a span where > manufactures ordered a lot of bad capacitors and used them during > manufacturing. The Abit BP-6 comes to mind with the dual Celerons, and had to > replace all of them with some decent tantalum capacitors. I always have a > supply of components when needed. As far as the surface mount and > multi-layered motherboards of today, it is quite difficult to work with. Ah > the days of repairing things while you could effortlessly without special > tools. Cars are like that, too. Gotta take the engine out just to replace > most things these days. > Those were the days, indeed. Richard -- http://lists.linuxfromscratch.org/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page Do not top post on this list. A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? http://en.wikipedia.org/wiki/Posting_style
