Hi Ky!
> Yup, that's the ending: "smoke got let out". Good thing was not
> literally.
KM> Ooops!!
As long as only an 'oops' and not an 'ohhh sheeeet'....!
> Last night opened the failed Ethernet switch just for fun -- combination
> of see what's inside and maybe repair or maybe snag a few parts (I do
> some electronics hobbyist stuff.) Did find the problem: two
> electrolytic capacitors have a noticeable bulge. Brand is Acon, and
> yes, they're on the list of manufacturers who had a manufacturing
> problem years ago. "Interestingly" the failed cap's are on the load
> side of a small power transformer while the those on the line side look fine.
KM> Yeouch. Yeah, failing capacitors cause all manner of weird
KM> glitches.
And part of the function of a electrolytic capacitor is to remove AC
ripples and line noise, not create it.
KM> Couple years ago my old switch failed (it just ceased talking to
KM> anything, and went from unpleasantly warm to HOT) and I had to
KM> replace it. Settled on the TP-Link TL-SG108, 8 port gigabit
KM> switch (at the time about $22), bought from their official eBay
KM> store, cuz it was handy.
KM> In fact I liked the first one so much that I promptly bought two
KM> more (so far!) and left 'em a glowing review. Literally plug in
KM> anything any which way (auto port sensing so doesn't matter if
KM> you use regular or crossover cables, nor which cable goes to the
KM> router), plug in the rather generic wall-wart, and it Just Works.
KM> Metal body, compact, and generates only a tiny fraction as much
KM> heat as the old switch; in fact despite that it's fanless, I have
KM> yet to notice either of the two in everyday use getting warm at
KM> all, even when busy. I gather this is because any port that's not
KM> in use goes into sleep mode. Doesn't use enough power to register
KM> on the UPS.
The old one hardly generated any sort of warmth either and AFAIK
didn't heat up after the failure either -- 'course the failure in the
power supply could have fried the switch part and so nothing to create
heat! (It looked unharmed; doesn't take much to open junctions.)
KM> Can also be daisy-chained, as I did initially before rearranging
KM> what's stuck to the router.
Right: the old ones had a specific port for input, and some a mechanical
switch to turn on and off the function.
> So with the patched system the live stream videos from the cameras are
> back to normal. Have the heat issue still but that's something
> different. The 'external accesses' are perkier -- before an ever-so-
> slight sluggishness had crept in. Still seems a little odd the one
> system for monitoring the live stream was the only one showing a
> problem, and didn't show a problem with packet errors.
KM> Your attic needs an exhaust fan; that would help a lot.
I get voted down on that option. ...And I'm not recalling seeing any
house with a fan, not that I'm actively looking and not the fan is on
the other side. The 'thing' around here, and what we have, is ridge
venting plus roof vents. Also a lighter-coloured shingle.
KM> And bad
KM> caps can do stuff like make stuff sluggish rather than failing
KM> entirely. (Eg. slow or spotty USB access = bad caps on the
KM> southbridge circuit.
Right: one of the first things I thought of when everything returned to
normal was the failed capacitors in the Ethernet Switch are acting like
a failing Southbridge circuit.
KM> And I think I just had one such that's on
KM> its way out sort of randomly scramble a directory when I did a
KM> normal file save... part vanished, part reappeared somewhere else entirely,
KM> replacing another directory of the same name, but
KM> without deleting anything... no files to recover... Well, we
KM> won't be trusting THAT system anymore...)
Or at least the motherboard part! I could sort of see the scrambling
and re-arranging: I think directory names (along with everything else)
are just a 'translation' of the ones and zereos: the 14th entry is 1110
and there's a table somewhere to say #14 = Pictures. Flip a binary
digit to 1010 and now it's in #10 so in some other directory. (Super-
simplied but close-enough to get the concept across.)
» BarryMartin3@ «
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