Vanessa and Dean,
I ran into this problem as well some time ago. After beating my head against
the wall for several weeks, I finally changed out the case. It seems that
the power switch was faulty causing the system to shut down! This is at
least another avenue to explore and would have saved me an incredible amount
of time and aggravation had I looked there first.
My humble opinion... hope it helps!
Dean Kiley
-----Original Message-----
From: Personal Computer Hardware discussion List
[mailto:[log in to unmask]] On Behalf Of Dean Kukral
Sent: Saturday, May 02, 2009 8:04 AM
To: [log in to unmask]
Subject: Re: [PCBUILD] Newly Rebuilt PC turns off.
Vanessa, when you ask a hardware question, you should always tell us what
hardware you are using!
I have had two motherboards do the same thing, an ASUS and an EVGA. Both
used the NVIDIA chipset. They would start, usually, if I
turned the power off at the power supply and let them sit for several hours.
Sometimes the ASUS would not. I got fed up with the
ASUS and replaced it with the EVGA. The new one will always start after
several hours of resting. If you are also using an NVIDIA
chipset, you may share my problem. (I will never buy another motherboard
with an NVIDIA chipset.) This work-around is a minor
inconvenience.
Another possibility is that your cpu is overheating. Did you do a good job
of placing a thin layer of heat-sink compound on the
cpu? I have built a good many computers over the years, and, still, on the
last computer that I built, I did not get the compound
on properly (maybe I am getting too old to build computers?) and it shut
down. However, I don't think that it shut down quite so
fast.
You may have a short. The likely culprit is on the bottom of the
motherboard. Check the clearances between the mb and the case.
Your brass stand-offs **should** keep it from shorting.
Is your power supply up to the job? Since we know nothing of your hardware,
it is difficult to comment.
Try disconnecting all the accessories except memory and video card and see
if you can boot to the cmos settings.
Dean Kukral
----- Original Message -----
From: Vanessa H.
To: [log in to unmask]
Sent: Saturday, May 02, 2009 7:32 AM
Subject: [PCBUILD] Newly Rebuilt PC turns off.
Hello all,
I need a little help. I have built 5 PC's in the last 8
years and do minor repairs for friends, so I'm not a complete novice. But
recently my son's PC would not turn on. I decided it must either be the
power supply or the motherboard. The first thing I replaced was the power
supply because it was the least expensive. Well, that did nothing. With
the new power supply in place, the PC was still completely dead. I then
purchased a new motherboard, processor and ram. After getting everything in
place, the PC turns on only briefly. I mean it literally only runs for
about 5 seconds. All the fans come on and it looks like it's about to start
up, but it turns off. I tried unplugging all the wiring and starting from
scratch, but I still only get about 5 seconds before it all goes dead. It
seems as though something is shorting out, but I don't know what? Please
help!
Kind regards,
Vanessa H
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