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[aprssig] WA8LMF UI-View webserver down, now back up

Scott Miller scott at opentrac.org
Tue Mar 8 23:03:51 UTC 2005


Yeah, I think this was a case of failed industrial espionage.

Here's the IEEE's article on the subject:

http://www.spectrum.ieee.org/WEBONLY/resource/feb03/ncap.html

Scott
N1VG

----- Original Message ----- 
From: "Keith - VE7GDH" <ve7gdh at rac.ca>
To: "TAPR APRS Mailing List" <aprssig at lists.tapr.org>
Sent: Tuesday, March 08, 2005 1:10 PM
Subject: Re: [aprssig] WA8LMF UI-View webserver down, now back up


Stephen WA8LMF wrote on Tuesday, March 08, 2005 12:15 PM PST

> The post-mortem on the original PC revealed that six
> 1000uF 25V aluminum electrolytic capacitors  (part of
> the motherboard DC/DC converter that supplies 1.5
> VDC and 3.3 VDC to the Celeron CPU) were bulging
> outward on top. One had actually split and leaked goo
> onto a toroidal choke where it fried into a black crisp.

There have been several fairly recent articles in a number of computer
magazines about electrolytic caps bursting on motherboards. I don't remember
which manufacturs were mentioned or if HP was amongst them. Have you looked
around to see if anyone else is reporting the problem for the same
motherboard that you are using? Could be a problem with all mobos of that
type from the manufacturer, or it could be they received a bad batch of
capacitors, or you could have a power supply (voltages too high?) that is
causing them to fail. A look in the bios should show the voltages present...
if you can get it booted. If the mobo is dead, you might have to use another
mobo to boot up and look at the voltages.

If the voltages from the power supply are high, chuck it out or scrap it for
parts. Wouldn't want to have it ruin the next motherboard. Hopefully the
power supply checks out OK.

73 es cul - Keith VE7GDH
--
"I may be lost, but I know exactly where I am!"




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