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Jeff
On Tue, 2005-06-14 at 22:16 -0400, James P. Kinney III wrote:
> WooHoo! Nice pics of dead hardware!
>
> That stuff is power component devices. Likely a capacitor used to trim the
> power to the CPU (they are often the largest things on the board).
>
> If I recall, you had some power supply issues with this rig earlier. It is
> likely that the PS was failing and cracked/nearly blew the case open on
> the cap. The new PS is fine but the on-rush of current was the end of the
> part.
>
> The _bad_ news is you are likely not going to get a new mobo on a warranty
> return. Unless the board was super expensive it's not worth a claim to
> insurance.
>
> As to tv tuner cable being the source of the power spike, Yes! It CAN happen.
>
> My first system that I bought myself was toasted during a lightning strike
> that was too close to the phone line. The box was OFF and UNPLUGGED but
> the phone line to the modem was still in and the modem was serial port
> cabled to the box. Chips were exploded in the modem, the mother board had
> burn marks all over it between traces and the hard drive heads were welded
> to the drive.
>
> More recently, lightning hit a tree outside my office (~5' from where I
> was standing!!). The EMP wave trashed all sorts of things. It induced a
> high voltage on wires like the Cat5e all over the office. That destroyed
> NICs and routers and switches and (I'm convinced but lacking direct
> evidence) the untimely dead of motherboard and hard drive 2 days later.
> I'll never forget seeing a pair of flourescent light tubes that were still
> in the plastic wrap leaning against the wall lit up like they were running
> at 500W instead of 35W! That was what let me figure out that the EMP
> induced an electric field over 5kV! All of my surge protectors were
> unphased. Even the first line of one shot wall wart protectors.
>
> So a very nearby lightning show even with great surge protection can wreak
> havoc.
>
> > Guys,
> >
> > After examining the mb with a flashlight, I found the culprit.
> >
> > See:
> >
> > <a rel="nofollow" href="http://www.sourceillustrated.com/mb_1.jpg";>http://www.sourceillustrated.com/mb_1.jpg</a>
> > <a rel="nofollow" href="http://www.sourceillustrated.com/mb_2.jpg";>http://www.sourceillustrated.com/mb_2.jpg</a>
> >
> > Ok...now for real technical lingo here...
> >
> > Of the four square thingies with the silver circle in the middle, notice
> > one is most definitely *not* like the other. First, what is this fried
> > and charred thingie? Second, does this look like it may have resulted
> > from a lightning strike (we had some good ones here this weekend). I have
> > the box behind a good surge protector and UPS, but like a DAU I have cable
> > running directly into a tv tuner card with no surge protection, so I'm
> > wondering if that may have provided a clear path.
> >
> > Interested in learning your thoughts. Thanks again for the help!
> >
> > John
> >
> > _______________________________________________
> > Ale mailing list
> > Ale at ale.org
> > <a rel="nofollow" href="http://www.ale.org/mailman/listinfo/ale";>http://www.ale.org/mailman/listinfo/ale</a>
> >
>
> _______________________________________________
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> Ale at ale.org
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</pre>
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<ul>
<li><strong><a name="00603" href="msg00603.html">[ale] Pictures of the culprit (was OT: Diagnosing HW problem)</a></strong>
<ul><li><em>From:</em> charriglists at bellsouth.net (Calvin Harrigan)</li></ul></li>
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<li><strong><a name="00543" href="msg00543.html">[ale] OT: Diagnosing HW problem</a></strong>
<ul><li><em>From:</em> jb at sourceillustrated.com (John Wells)</li></ul></li>
<li><strong><a name="00551" href="msg00551.html">[ale] OT: Diagnosing HW problem</a></strong>
<ul><li><em>From:</em> jb at sourceillustrated.com (John Wells)</li></ul></li>
<li><strong><a name="00557" href="msg00557.html">[ale] OT: Diagnosing HW problem</a></strong>
<ul><li><em>From:</em> jkinney at localnetsolutions.com (James P. Kinney III)</li></ul></li>
<li><strong><a name="00558" href="msg00558.html">[ale] OT: Diagnosing HW problem</a></strong>
<ul><li><em>From:</em> jb at sourceillustrated.com (John Wells)</li></ul></li>
<li><strong><a name="00560" href="msg00560.html">[ale] OT: Diagnosing HW problem</a></strong>
<ul><li><em>From:</em> cfowler at outpostsentinel.com (Chris Fowler)</li></ul></li>
<li><strong><a name="00561" href="msg00561.html">[ale] OT: Diagnosing HW problem</a></strong>
<ul><li><em>From:</em> jb at sourceillustrated.com (John Wells)</li></ul></li>
<li><strong><a name="00562" href="msg00562.html">[ale] OT: Diagnosing HW problem</a></strong>
<ul><li><em>From:</em> mdhirsch at gmail.com (Michael Hirsch)</li></ul></li>
<li><strong><a name="00572" href="msg00572.html">[ale] Pictures of the culprit (was OT: Diagnosing HW problem)</a></strong>
<ul><li><em>From:</em> jb at sourceillustrated.com (John Wells)</li></ul></li>
<li><strong><a name="00586" href="msg00586.html">[ale] Pictures of the culprit (was OT: Diagnosing HW problem)</a></strong>
<ul><li><em>From:</em> jkinney at localnetsolutions.com (James P. Kinney III)</li></ul></li>
</ul></li></ul>
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