On Wednesday 22 July 2009 02:54:41 Paul Bransford wrote:
> Bob Stia wrote:
> > On Tuesday 21 July 2009 00:45:21 Paul Bransford wrote:
> >> Bob Stia wrote:
> >>> On Monday 20 July 2009 12:03:21 Eben King wrote:
> >>>> On Sun, 19 Jul 2009, Bob Stia wrote:
> >>
> >> The wattage of the power supply doesn't have anything to do with it
> >> failing, these things can die after a time. Sure, loading it close to
> >> (or overloading) it's capacity can shorten it's life, but that's not
> >> what I'm after right now.
> >> -----------------------------------------------------------------------
> >
> > OK Paul,
> >
> > I fully understand what you are saying, the power supply, although big
> > enough, might be going bad.
> >
> > But you need to explain to me why the power supply could be causing this.
> > The monitor(s) are completely self powered. The only input to the monitor
> > is a small digital signal through the DVI cable. Don't really understand
> > the relationship with the power supply. Learn me !!
> >
> > Bob S
> >
> > -----------------------------------------------------------------------
> I don't think this has _anything_ to do with your monitor.
>
> It sounds like your motherboard is not sending your power supply the
> PWR_GOOD signal unless you start it, shut it off, and start it again.
>
> The motherboard will not send that signal if it is not getting correct
> voltages. It could be that your motherboard only checks this once during
> post, meaning if the voltages have not stabilized yet, it will not fully
> power on. Once the power supply has 'warmed up' and is sending the
> correct voltages, it will 'pass' the self test, and the board will send
> the PWR_GOOD signal. This tells the power supply to "give it all she's
> got" and really power up the machine.
>
> My point is, that what you are seeing is a half-powered-up system.
>
> This is most likely because the timing on the power supply is bad, or
> voltages are not 'clean' right away. These are both signs of an old,
> failing, power supply. I suggest you test it, or find an alternate power
> supply to see if the issue continues after swapping it.
> -----------------------------------------------------------------------
Thanks Paul,
Or the video card, or the MB itself? Hmmm. Looks like I might have to start
switching out components.
Bob S
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