Re: Blade 2500(red) totally dead. Bad pwr-supply, off-on button, maybe?

David Combs wrote:
I come back from one week vacation, and eventually go to bring
up my sunblade 2500(red).

[I say "red" because the later
version of the 2500 is titled "silver". And red and silver
each has its own manuals.]

I turn the UPS back on, wait until it beeps, then hit the
on-off button on the 2500.

Nothing happens. No fans, no lights. NADA. DEAD.

I get my beep-when-near-110VAC-thats-live thingie; yep, power cord
beeps ok. I even unplug it from the machine, hold it up
high away from everything else, and it still makes a beeping.

A couple of hours later, I even unplug it again, and stick
the leads from my VOM (volt-ohm-meter (amps too)), and yep,
reads 120.5 VAC. Lotsa power available.

I call the people I bought it from (Livewire, in Toronto (even
though I live 20 miles north of NYC)), and am told to hold down
both the diamond and moon keys, that that often will bring
a 2500 (or any sparc, or any sun?) out of some deep sleep (coma?).

Nada.


Meanwhile, the people at Livewire are talking about sending
me a new power supply.

So, I have a look inside the machine, and there must be a jillion wires (in one large bundle) coming out of the power-supply, each one going to some different component.

You know, there's ZERO chance that klutz-fingered me -- that I'm *ever* going to be able to get a new one hooked up right.

(Yeah, eons ago, I built that huge Heathkit "ham" receiver;
but when finished, I had to have them fix my wiring and solder
errors, to make it actually work. Am no good with intricate things!)

Man, am I in one deep hole! Monster 2-cpu machine, and looks like
I'm the one who's gotta fix it.

----

So I call my recently-acquired-and-paid-for sun SOFTWARE service (nope, unable to get (buy) sun hardware service -- 2500 line
has long passed its "end of service [availability] date"), but
if simultaneous key-presses (QUESTION: is the word "chord" (as via piano) the commonly term for that simultaneous key-pressing?) are a possible solution, then it should qualifies as a "software" problem, yes?

Anyway, the sun-service guy finally calls, and at maybe 20min of
discussing the problem, I just happen to notice that my "empty" (ie
unused) 4-port powered usb-hub is plugged into one of the 2500's
4 usb ports. Heck, might as well get rid of
some messy power-cords and connecting-wire, clear the decks, so to
speak. So, for general cleanliness, I unplug it.

Instantly, this noise I'd been hearing but couldn't track down
and had finally blamed on my "turn on the power at x time, off
at y time, etc" (to my tape-recorder for fm-recording at 3am), which
made the same kind of low-level "grinding" noise --
(my ears' location-ability ain't been so good the last decade
or so) STOPPED. IT ALL BECAME QUIET!

Hmmm. Obviously, something happened, via the unplugging of the hub.

So just for the hell of it, really, you know -- no hope,
but why not?, I hit the ole off-on button. Blow me over -- up it comes, and within a minute or so, it's at ok.


WOW!

Now, at least to me, that's one *huge* surprise. How in the
world can a stupid (perhaps faulty?) usb-hub, plugged into
one of the 4 usb-ports, keep the machine from at least TURNING ON?

You know, like starting the fans, even.



Comments? Explanations?



If there's a short circuit in the USB power wiring your power supply may be saving you from "smoke and flames"!

Try plugging your USB devices in one at a time. You just might find the device causing the problem.

Could it be the sheer NUMBER of devices?
.

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