Flashing Light Indicators un Simple Front Panels

From: Pete Turnbull <pete_at_dunnington.u-net.com>
Date: Sat Dec 15 05:28:37 2001

On Dec 14, 16:16, Douglas Quebbeman wrote:

> In particular, do any of you have familiarity with
> systems that flash the on or power light as an
> indicattor, sopecifiecally, of a power supply
> problem?

The only thing I can think of that's *designed* to do something like that
is an SGI Indy; if you power one up and it can't even run the the code in
the PROM, it flashes the power light (which is a two-colour LED). The
usual cause id that there's no (recognisable) RAM at all in it. Probably
not relevant to a PR1ME.

Even less relevant, but in the same vein, is an Acorn Archimedes. If it
can't boot, and can't set up the display, it flashes a 4-bit fault code on
the floppy access LED. However, the code is RISC OS-specific.

> Would anyone venture what a 2 Hz flash rate on the ON
> LED of a Prime might mean?

If it's a short "on" and a long "off", it might be a power supply that is
starting up , detecting a problem, and shutting off again. And retrying,
and ... Is there any accompanying, possibly fairly quiet,
whistle/buzz/click that occurs at the same rate?

-- 
Pete						Peter Turnbull
						Network Manager
						University of York
Received on Sat Dec 15 2001 - 05:28:37 GMT

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