Text 69580, 43 rader
Skriven 2012-12-28 08:09:00 av Ed Vance (10991.windowsa)
  Kommentar till text 69461 av MARK LEWIS (1:3634/12.42)
Ärende: NIC LEDs ?
==================
Date: 11-27-12 (20:23)
From: MARK LEWIS    To: ED VANCE
Subj: NIC LEDs ?
  >ML>this can also be confirmed by the power switch...

ML>ML>if it is a spring loaded momentary contact switch, then it is using "soft
  >  >power" and there's power to the MB all the time... even when
  >  >switched off...

ML> EV> Mark,

ML> EV> It's a spring loaded push button switch.

ML> EV> Do You mean the power supply is always furnishing power when the
  > EV> plug is plugged in to a A.C. power outlet?

ML>yes... it is called soft-power... basically there's 5 (or 3??) volts being
  >supplied to the boards all the time... kinda like your TV's instant-on featu
  >that can't be turned off any more... yes, your TV is a power thief like a wa
  >wart and has been for a very long time ;)

Mark,

Thanks, Yes I know about TVs VCRs etc. that are turned on with a Remote
Control use AC power all the time

ML> EV> I would think if the power supply was furnishing power to the
  > EV> motherboard, the CPU would also be powered up even though the push
  > EV> button power switch hadn't been pressed? Right or Wrong???

ML>only certain circuts are powered with soft-power... modem, mouse, keyboard,
  >NIC... maybe others... you've seen those systems where you can turn the mach
  >on and off via the keyboard, right? they are a good example...

I added a ROUNDTUIT to the list to search for a Schematic for the
Motherboard in this HP a1430n XP box, but probably won't find one.

I've learned a lot by looking over Schematic Diagrams.


 * SLMR 2.1a #T348 * A phaser is the universal communicator. - Worf
--- SBBSecho 2.12-Linux
 * Origin: telnet & http://cco.ath.cx - Dial-Up: 502-875-8938 (1:2320/105.1)