Nathan has a good point on checking the psu.

One long shot you might also check---On the rear of
your unit, on the back of the power supply is usually
a switch:   110v/220v.  Make sure it is set for 110v.

Homer

--- "N. Thomas" <[EMAIL PROTECTED]> wrote:
> 1) Check for power supply low voltage or overload. 
> Make sure the PSU
> meets the minimum wattage requirements for that CPU
> / Mainboard
> combination.  Make sure testing power supply meets
> HP specs, if the
> system utilizes a proprietary extra connector, your
> testing PSU may
> need to be the same HP part number.
> 2) Check signal cable on monitor for intermittent
> connection or swap
> monitor.  Check brightness/constrast adjustments;
> monitor may also
> have a setting for input voltage: check!
> 3) Swap VGA card if applicable.
> 4) Check for grouding on systemboard.  If there is
> an incorrect ground
> or short it may cause voltage loss across the VGA
> output.
> 
> 
> --- In [email protected], "joe979xx"
> <[EMAIL PROTECTED]>
> wrote:
> > It shows the HP Log screen then boots to a
> dim/black screen. I tried 
> > to boot to a startup disk and it's still the same.
> (I even 
> > disconnected the hdd). So I then replaced the
> motherboard with a new 
> > one and still have the same exact problem. What
> could it be? Power?
> > 
> > It's an HP A350 desktop with WIN XP Home.
> 
> 
> 


                
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