Re: P4P800 System failed CPU test
- From: nospam@xxxxxxxxxx (Paul)
- Date: Thu, 23 Mar 2006 10:27:06 GMT
In article <wrGdnSwgs7pK97_ZRVnyrw@xxxxxx>, "John G"
<john.greenleaf@xxxxxxxxxxxxxxxxxx> wrote:
PC locked up in normal use when rebooted vocal "System failed CPU test"
A search of Asus site found this to be a common problem due to mobo, power
unit, graphics card, memory or processor in that order.
I tried the PU from another PC removed one of the two sticks of RAM and
tried in different slots, still faulty .
I took the PC to see a friend with a lot of experience plenty of spares.
This is the order we tested in:
Swapped my graphics card with another PC, other PC worked mine didn't.
Tried P4 from other PC didn't work in mine, other PC would not take my
Prescott.
Swapped memory with other PC, other PC worked mine didn't.
Tried another power unit, still didn't work.
Removed all connections from mobo that were not required for testing, still
did not work.
Removed mobo from case and bench tested, still didn't work.
Got RMA and mailed mobo to retailer.
Retailer tested and says no fault found.
Where do I go from here please?
John G
"other PC would not take my Prescott."
What exactly does that mean ? Was the other PC not Prescott compatible ?
Or was the other PC ready to accept a Prescott, but the Prescott
did not work ?
I trust you've tried clearing the CMOS. (Follow the instructions
in the manual, and unplug the computer before doing the procedure.
That helps ensure no +5VSB is present to do damage during the
procedure.) Clearing the CMOS could remove an errant setting
being used to set up the clock generator.
Have you tried testing the motherboard while it sits on top of
a piece of cardboard ? I like to use a thick telephone book, with
a cardboard or paper cover. That provides an insulating surface
and some mechanical support for when you plug in components.
The cardboard test will remove some of the mechanical stress the
motherboard might be under, when it is screwed to the motherboard
tray. It also removes the opportunity for the standoffs or screw
heads, to touch something that they should not be touching.
My last two computer builds, I assembled them on a table top without
the computer case, and booted Windows with all the gear sitting on
the table. The hardware is much easier to reach and inspect, when it
is sitting on a table like that. The only risk factor, is there
is nothing securing AGP or PCI cards, so be very careful not to
tug on a cable and pull an add-in card out of its socket. (Make
sure there are no small children in the area of your table :-) )
"Retailer tested and says no fault found." Do you trust the
retailer ? Is the retailer a company that doesn't want to
deal with merchandise returns ? Was the motherboard returned
very quickly, too quickly to have been tested well ?
How is your Southbridge ? Does it look like this ? If it
does, there is no way the motherboard is going to POST.
This is a frequent cause of 865/876 family motherboard failures,
due to the ICH5/ICH5R failing. The chip can be replaced
under warranty if it happens.
http://www.abxzone.com/forums/showthread.php?t=84122
http://tw2005.giga-byte.com/Motherboard/Support/FAQ/FAQ_456.htm
Paul
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