-=PCTechTalk=- Start Problem?

  • From: "cajun12" <cajun12@xxxxxxx>
  • To: <pctechtalk@xxxxxxxxxxxxx>
  • Date: Mon, 2 Jun 2008 21:11:56 -0500

3-year old home build, Gigabyte 8I915P Duo Pro Motherboard, P4 3.0GHz, =
2GB DDR RAM (abt. 1 to 1-1/2 years old), Antec 430 Watt True Power 2.0 =
PSU (2 years old), Windows XP Home, no errors in Device Manager.  I have =
not added any peripherals or taken any out in a long time. =20

About 3 weeks ago I started having problems with my computer not wanting =
to turn on at all.  I've been having to press the Power button over and =
over, feeling around each side to see what the sweet spot of the day =
might be, dreading that today would be the day it wouldn't turn on at =
all.  I cleaned it out, reseated everything, no change. After you press =
it over and over, it'll come on and run fine.  It's not unstable, not =
overheating, temps are the same as always, and it's not rebooting =
itself.  It runs fine until I turn it off for the night.  I thought =
surely it must be the case power switch.  Everything, including front =
panel, is attached to the front bezel/face plate.  Hubby is =
electronically/mechanically inclined and he looked at it, found one =
broken off out of two naked wires coming off the switch into a small =
white box that has wires that plug into the HD line to make the light =
blink when there's HD activity.  He clipped the other naked wire to the =
same length and shoved them back in the white box and we thought that =
was surely it - NOT!  I pulled the switch wires off the motherboard to =
check for dust or loose connections, no change.  Hubby also thought it =
was the switch, so I bought another case and transferred everything into =
it, and it's still doing the same thing.  Now I really like my new case =
and I don't regret buying it, but that's not the problem.

I've reseated the RAM, tried it with just one stick, swapped out the =
current RAM for the sticks of 512MB Corsair that I upgraded from - no =
change.  I unplugged all the drives - no change.  I thought maybe one of =
my optical drives was causing a problem, so I unplugged them one at a =
time, and plugged them back in one at a time - no change.  A few times =
we saw the rear fan give a slight jerk when we pressed the power button, =
but it didn't come on.  I have a brand new LCD power supply tester and =
the Antec PSU test numbers are below.  The PSU plugs into the MB with a =
4-pin 12v connector, which I also plugged into the tester.

+5v:  5.2
+12v1:  12.1
+3.3v:  3.3
-12v:  11.9
+12v2:  12.0
5vSB:  5.2
PG:  350MS

Here's what Speed Fan shows:

Vcore1:  1.31V
Vcore2:  2.56V
+3.3V:  3.23V
+5V:  4.97V
+12V:  11.84V
-12V:  -8.91V
-5V:  -7.72V
+5V:  6.85V
Vbat:  3.18V

So, what else should I be looking at here?  Motherboard?  CPU?  Is it =
possible to have a circuitry problem on the MB where the Power Switch =
plugs in?  I've taken in a couple of computers that had motherboard or =
CPU problems, but they were always unstable and never acted like this.

I'm tired of thinking about it and I need some fresh input.  Thanks!  : =


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