DeLyle,

I'm not sure that the power supply (and its fans) is what needs to be
replaced.  Unless your power supply has a fan speed wire that is connected
to chassis fan header #1 on your motherboard, this is more likely a case fan
(typically, the one at the back, below the power supply) that is being
reported as not spinning up.  However, it would be good to take a look at
the motherboard, locate the fan header labeled CHA1, and check what is
plugged into it.  This is the fan that likely needs to be replaced.

While you're at it, this would be a good opportunity to make sure all the 
other fans appear to be operating
properly and clean dust out as necessary.

John Sproule

-------- Original Message Below ----------

Date:    Tue, 14 Sep 2010 09:47:48 -0700
From:    DeLyle Dvorak <[log in to unmask]>
Subject: Computer Fan

My desktop PC (built in Dec 2005) running Windows XP Pro SP3 is showing a
warning message at boot up: CHA1 Fan fail or speed too low. I can hit F1 to
ignore it or delete key to enter the setup where there are 3 options for fan
speed. I've tried all those speeds (not sure which speed should be selected
but
I'm guessing that a problem exists for sure after the warning comes on at
the
lowest speed selected). In checking the build on this unit they've installed
a
Power Supply 400W ATX Dual Fan with an Asus A8N-SLI Deluxe motherboard. Can
I
replace the fan with any 400 Watt Power Supply? I've noticed that Amazon has
them at various prices. Thanks for your help.
DeLyle Dvorak

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