Dead mobo?

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Dead mobo?

Name: Kreeos
Date: October 20, 2009 at 18:14:59 Pacific
OS: Microsoft Windows Vista x64
CPU/Ram: Intel Q6600 / 6GB DDR2
Product: Intel_ / D975xbx2
Subcategory: General

Comment:

I had this same problem a month or so ago, fixed it then but now it's
back and it's worse. One night I was using my computer, no signs of
any problem. I shut it down for the night and it shut down normally. The
next morning I went to turn it on and it had the lovely lights are on but no
one's home problem. The fans spin and the LEDs come on, but there's
no output on the monitor and the system doesn't POST.
I decided that since the symptoms are identical to the problem I had
before, I'd try doing the same thing to fix it this time. So I unhooked
everything except for the CPU, one stick of RAM, and the video card. No
effect. I then decided to take out the one RAM stick and see if it would
complain that there wasn't any RAM and well, it didn't. I know that the
speaker can't come unplugged cause it's part of the motherboard.
Thoughts?

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Response Number 1

Name: aegis1
Date: October 20, 2009 at 18:33:15 Pacific

Reply:

If you have everything disconnected from the motherboard including the RAM sticks and do not get any error beeps, the problem is either the power supply or the motherboard. Try swapping the power supply, they fail the most. Don't assume it's good because you see some lights.
The CPU should be left on the motherboard, it is needed to put out the beeps.

Response Number 2

Name: Kreeos
Date: October 20, 2009 at 18:37:33 Pacific

Reply:

Not the power supply. Just tried a known good and still no
beeps. Must be the motherboard then.

Response Number 3

Name: aegis1
Date: October 20, 2009 at 18:38:46 Pacific

Reply:

You didn't remove the CPU, I hope. It's needed to get the beeps.

Response Number 4

Name: Kreeos
Date: October 20, 2009 at 18:42:15 Pacific

Reply:

Of course not. Without a CPU the comp's an over-priced
paperweight, lol.
I'm booting it with only the mobo, the CPU and some fans
plugged in.

Response Number 5

Name: aegis1
Date: October 20, 2009 at 18:49:35 Pacific

Reply:

You might want to remove the graphics card (if you haven't) and see if you get the beeps.

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Response Number 6

Name: Kreeos
Date: October 20, 2009 at 18:50:30 Pacific

Reply:

Just did. Still no change.

Response Number 7

Name: aegis1
Date: October 20, 2009 at 18:55:01 Pacific

Reply:

If it was me I would remove the motherboard and bench test it, before ordering a replacement. I don't see that many bad motherboards. Maybe take it to a shop for a test?.

Response Number 8

Name: Kreeos
Date: October 20, 2009 at 18:59:31 Pacific

Reply:

I might do that. But really I've narrowed down the problem to
either mobo or CPU and CPU's don't work for a couple months
out of the box and then spontaneously die with no warning. I'm
very much doubting it's the processor. I do have another one
lying around that I can try. That will pretty much confirm that the
mobo's dead.

Response Number 9

Name: aegis1
Date: October 20, 2009 at 19:09:35 Pacific

Reply:

I agree with you, that it's unlikely to be a CPU problem, but you never know.
Good luck!!

Response Number 10

Name: nbrane
Date: October 21, 2009 at 01:22:26 Pacific

Reply:

my seat-of-pants test of cpu, prob'ly not applicable, is: remove
cpufan, let system rest, boot and hold finger on center of cpu.
If it gets too hot to hold your finger on (unless you are into
pain), it's prob'ly cpu, but also timing: how fast does it become extremely hot. If very fast, more likely cpu. I know some cpus will heat extreme without fan and shut down, but
most don't heat real high for at least 10 - 15 seconds. Only
other way i know is swap out cpu (at much risk: I burned up
motherboard AND hard drive trying this maneuver, so be sure
to unhook/remove hard drive and all peripherals/components
and risk trashing ram).
ps: "heat-test" (fingertip) all other major
compents of board espec. power trans
(these rarely bad however). any spot
that is hot to touch indicates short to
ground and component failure at point of
heat.

Response Number 11

Name: probfixer
Date: October 30, 2009 at 14:28:06 Pacific

Reply:

CPU or MOBO

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