N. Thomas.  

Thanks for the clearly stated info. 

As I tried to explain, I am not presuming it is the
PSU.  Since I will be dealing over the phone, I just
want to be prepared to ask, discuss and recognize the
symptoms.  I don't know what I will hear.  But, While
I know any PSU problem or a faulty line can cause a
boot problem, I wasn't sure how it would manifest
itself. I just wanted to be able to recognize its
symptoms--in case.  

Thanks, again.  Homer

--- "N. Thomas" <[EMAIL PROTECTED]> wrote:

> ... as well as 3.3 V +/-
> 
> The ATX2.0 spec and Intel's P4 extensions also
> define other voltage
> ranges and minimum load ratings as well as
> efficiency.
> 
> A completely failed power supply will not start the
> PC at all.
> A failing power supply typically will power off
> before POST completes
> (as that is typically the highest point of load
> during bootup)
> If the fan is not functioning it should keep the
> power supply cool
> enough to at least boot up the computer.
> 
> In any case, a faulty PSU is one of the least likely
> causes of bootup
> to not complete. (bootup being POST and completely
> loading the OS)
> 
> --- In [email protected], Curtis
> Claxton
> <[EMAIL PROTECTED]> wrote:
> > remember the computer ps  primary voltages are +5,
> -5 and +12v dc.....
> > 
> > Blake Schneider <[EMAIL PROTECTED]> wrote:If she has
> a bad power
> supply, the computer may not boot at all, it
> > may get past the post and restart, or it might
> even last long enough
> > for windows to start before  restarting.
> > 
> > One easy way to check if it's the power supply is
> to have her look and
> > see if the fan is spinning on the power supply
> when she turns it on. 
> > Does it stay on, does it only make 1 revolution?? 
> If the fan is
> > spinning then it may not be a Power Supply issue.
> > 
> > Blake
> > 
> > On 6/14/05, JIM <[EMAIL PROTECTED]> wrote:
> > > Homer,
> > > 
> > > > My niece, a couple of hundred miles away, is
> having a
> > > > problem with her computer not booting up.
> > > 
> > > I would not assume that the problem is the power
> supply is the
> fault. It 
> > > would help if you describe what she sees when
> the computer does
> not boot. 
> > > What messages, what actions.
> > > 
> > > Jim 
> > > 
> > > 
> 
> 
> 
> 


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