[rescue] SGI Challenge L Power
koehler at shaw.ca
Wed Jun 2 11:39:05 CDT 2004
Hi Francois and All,
You might want to look at this:
You might be able to get SGI to replace the power supply free :). I did it with my onyx a couple of years ago. If you already have the new rev power supply you will be SOL, of course. Speaking of Challenges (Challengi?), Im still looking for an L backplane - anyone??
Saskatoon, SK, Canada
Home of the SART Observatory
----- Original Message -----
From: Francois Dion <fdion at atriumwindows.com>
Date: Wednesday, June 2, 2004 9:12 am
Subject: Re: [rescue] SGI Challenge L Power
> Sheldon T. Hall wrote:
> >Francois Dion says ...
> >>Getting closer. In fact it's a good thing I had this small
> victory last
> >>night. Before I looked at the crimson again, I had decided I'd be
> >>playing with the Challenge L and altough the power supply AC
> good led is
> >>on, when I turn the key, nothing happens :O Argh. So now I have
> to track
> >>down yet another problem.
> >Well, at last. Something SGI I can _talk_ about, instead of
> _ask_ about.
> >On my Challenge L, the switch in the back (the circuit breaker)
> is funky.
> >It feels a bit limp when you move it; it doesn't have the firm
> internal>"snap" you'd expect. If you just move it from "Off" to
> "On", it doesn't
> >really go on. You have to snap it over fairly quickly and
> forcefully. If
> >you do that when the machine's plugged in, the power-supply fans
> come on, no
> >matter the keyswitch position. If the PS fans are on, and you'll
> hear 'em
> >if they are, the key switch will do something. Otherwise it won't.
> As you might remember I had gotten a -12V overvoltage a few weeks
> Eventually it resume normal operation and then I powered it off
> about 2 weeks.
> You had replied:
> >Great! Of course, the reason for the original error is still
> So something was wrong it seems. How it works right now:
> Flick the power to "on", comes on ok, power supply fans are on, AC
> Good led is on (amber). Turn the key to on, and nothing... The LED
> display backlight doesn't even come on. Nor do the two leds above
> the SC come on...
> Looking at:
> Ah! It states:
> 2.2.1 System Controller and OLSs
> Each OLS also has a green and amber LED. The amder LED lights to
> indicate that the AC input voltage level is within acceptable
> levels. The green LED lights to indicate that the DC output
> voltage levels are within acceptable levels. Both LEDs should
> remain lit during normal system operation.
> And of course, the green LED is off. I wasn't sure if that was
> dependant on the keyswitch or not, but from this it is clear it is
> self-contained. The key only interrupts power from the 48V output
> of the PS to the backplane. So I guess I'll be looking at the
> power supply (Cherokee). Unless somebody has a spare. Man, Octane
> PS are a dime a dozen, but I bet it's going to be hard to find a
> PS for the Challenge.
> rescue list - http://www.sunhelp.org/mailman/listinfo/rescue
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