"s44" said:
I wish someone could help, but I do strongly believe that this is a defect
that can only be cured by replacing that motherboard with one that works. I
did mention that I've read a lot of messages from people with this problem
who spent a lot of effort trying to fix it and no one suceeded. I had many
devices of all sorts that had defects, but never dealt with a total wall of
silence. I wrote email and called ASUS and there was zero response. The sign
of a lousy company is when they tell you they'll call back, and when their
web site doesn't work. I don't trust a fruitcake maker without a web site,
but a computer-related company with a part-dead website?
So everyone is welcome to help, but I don't hold my breath. I posted not to
complain or even to get help, but to give a warning (community service) and
express my amazement at a technology company that has no technical support.
As to the actual nature of the defect, my personal guess is that due to the
use of low quality parts the power supply to the CPU on the motherboard is
failing. Most likely it's the use of garbage-quality electrolytic
capacitors. In fact, it turns out it is not uncommon that these capacitors
leak like used batteries on some of the motherboards assembled by these
"famous makers from Taiwan". Several months after they leave their shop.
You should check Homey's site -
http://motherboardrepair.com/
Notice how Asus is not listed as using crappy capacitors.
Set your mind at ease. Homey repairs large numbers of motherboards,
but Asus is a tiny part of his business.
So here it is:
1. P4C800 Deluxe bought last year (2004).
See suggestion at bottom of posting...
2. Runs a pentium 4 Northwood 3 Ghz/512/800 1.55 V max
3. Is not running overclocked, but overclocks at least to 3.3
4. Power supply is Inspire 500 W, but this is not relevant, since people
describe exactly the same problem with all brands of power supplies
including Antec, and others.
Is not relevant until the power supply fails
Power supply
failures are more common than motherboard failures, and are the
first part to swap out of a system. In the 500W class, there
are a number of dodgy brands to stay away from.
5. Again, the same probem occurs in all sorts of configurations.
6. The BIOS is the newest for this board, v. 1019. Upgrading the BIOS from
older version did not do anything to this behavior.
The problem is:
The system halts at POST with the message "System failed CPU test". After
recycling power, most of the time it starts normally. However, on occasion,
need to repeat the power cycle. Recently even four times.
Sometimes starts the first time.
The problem did not occur for the first month or so. Now nearly every time.
According to some people with this problem, it will get worse until no go.
This occurs only at the first start of the day. After started, keeps
running, and can be turned off and restarted without a problem.
Happy New Year.
XZV
<<snip>>
A long time ago, there was a problem with the P4C800 deluxe
- see the post by Mechabouncer in this thread. This only applied
to the first few thousand boards. The solder short is somewhere
around the plastic stiffener for the CPU, on the underside of the
board. The picture is with the plastic part removed, showing how
the hot solder got distorted enough to touch an adjacent solder
joint.
http://www.techsupportforums.com/showthread.php?s=&postid=41955
http://web.archive.org/web/20040227200251/http://koti.mbnet.fi/~nightops/eki/DSC00249.JPG
If the solder is partially touching, this can overload the +12V
from the power supply. Either fix the solder blobs yourself, if
you have a high wattage power supply, or do the right thing, and
RMA the board to Asus for one which is soldered properly. The
above JPEG picture shows the bottom of the motherboard, with the
plastic piece removed. Even without removing the plastic, you
should be able to see whether the solder was pinched while the
board was soldered with the plastic in place. If the solder
looks pinched, you can then have a look underneath it, to see if
it is partially shorted.
The Asus 3 year warranty should sort out most problems. The one
exception might be getting a replacement board, if you mess up
a LGA775 processor socket
HTH,
Paul