Re: [SLUG] hardware issue

From: Bob Foxworth (rfoxwor1@tampabay.rr.com)
Date: Tue Aug 09 2005 - 15:47:43 EDT


> Also, I see it all the time when you plug the pc up the nic turns on.
Most cards today, "wake on
> lan."
>
> William
>
> >
> > note: when plugged in the computer's onboard ethernet does activate
> > (see the lights for it on the ethernet switch).

I am not sure this is the same thing. WOL sends a specially created
packet
over the ethernet to a NIC (with WoL functionality turned on) to cause a
hibernating machine to remotely come to life. In fact, the little
program "etherwake"
(conveniently found on the new "operator" CD 3.3.19, as version 1.08-1)
will
let you "wake up WoL-compliant computers which have been powered down
to sleep mode".

In a modern system today, there is some voltage from the power supply
present,
with the AC power cord inserted, even though the machine is "powered
off" and the OS not loaded, this voltage lights the link LED on the NIC,
if
a cable from a working (powered) hub etc is plugged into the RJ45 jack.

This is why the recent comments here about turning on the power supply
off-on
button, with the AC cord removed, to drain off voltage.
.
My Dell GX-1 pizzaboxes with a 3c905 onboard NIC do this LED light-up,
even when no OS has been booted. In fact I run them with knoppix-type
discs, as they don't contain HD's.

You can get 500 MHz systems like this, complete except for the HD,
mouse, kybd and monitor, for $40, and that's probably paying too much,
if you go to the computer shows and look around. Usually in pizzabox
case
format.

- Bob

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