CPU failed?

  • Thread starter Thread starter CLC
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What symptoms would I get if the CPU failed?
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It won't turn on but there will likely still be power to the motherboard in
that fans will spin up, the power supply will (of course) make noise, etc.

--
Galen

My Geek Site: http://kgiii.info
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"It is a capital mistake to theorize before you have all the evidence. It
biases the judgment." - Sherlock Holmes
 
you would get nothing!
it's best to take those kinds of problems to a good shop and have them look
at it.
 
The fans run, lights come on, but nothing else.
Have new PSU, mboard, swapped memory.
Thinking CPU is last thing left
Chris
 
CLC said:
The fans run, lights come on, but nothing else.
Have new PSU, mboard, swapped memory.
Thinking CPU is last thing left
Chris
Click to expand...
Could also be you don't have one of the connectors from the power supply
connected to the motherboard, especially the 4 pin one. If the CPU fan
is not connected to the right connector or is not the right type the
computer will shut down immediately.
 
it sounds like you have narrowed it down to the right item, however it really
impossible for us to know for sure. if you didn't get any beeps from the Bios
, does it have an onboard graphics chip or is that seperate?
Best thing I can suggest for you to do is take it to a good repair shop,
it's too hard for us to sit back and try to diagnose whats wrong without a
hands on approach.
 
If the CPU fan is not connected to the right connector or is not the right
type the computer will shut down immediately.
Click to expand...

I've done this intentionally with Pentium D systems and they run until they
get too hot and shut down. Time required depends on the CPU load. One one
system I pulled the fan power about 15 times over two days and watched the
system shut down, just to see what happens.

Bizarre, I'll admit, but it is part of a training program and I needed to
know if the CPU would fail or soldier on. I eventually developed a system
that can open either of the three important CPU fan leads.

-John O
 
CLC said:
What symptoms would I get if the CPU failed?
Click to expand...

assuming the power supply is OK and connected well, you can pull everything
else. If you have integrated video, you'll still get BIOS screens with
nothing but a mobo, power supply, and CPU.

-JohnO
 
JohnO said:
I've done this intentionally with Pentium D systems and they run until they
get too hot and shut down. Time required depends on the CPU load. One one
system I pulled the fan power about 15 times over two days and watched the
system shut down, just to see what happens.

Bizarre, I'll admit, but it is part of a training program and I needed to
know if the CPU would fail or soldier on. I eventually developed a system
that can open either of the three important CPU fan leads.

-John O
Click to expand...
My 3.4 GHz CPU was shutting down almost instantaneously when I first
installed it as one of the pins was not firmly attached. (I hate the
new mounting setup for this reason.) No warnings were given and nothing
appeared on the screen. Once I got all the pins properly installed the
computer worked fine, other than the fact that the CPU was right next to
the power supply in the first case and was overheating because of bad
air flow.
 
Michael W. Ryder said:
My 3.4 GHz CPU was shutting down almost instantaneously when I first
installed it as one of the pins was not firmly attached. (I hate the new
mounting setup for this reason.) No warnings were given and nothing
appeared on the screen. Once I got all the pins properly installed the
computer worked fine, other than the fact that the CPU was right next to
the power supply in the first case and was overheating because of bad air
flow.
Click to expand...

This is possibly BIOS-dependent, or that CPU was hitting its heat threshold
very quickly. Hard to say without monitoring the CPU temp I suppose.

I did all my crazy stuff with an Intel DG965SS mobo. Typical shutdown was
after about 3-4 minutes. I do know that trying this with an older AMD is
likely to result in a quick fire and total destruction of the CPU and
motherboard, wish I had one to try. :-) I think their new stuff is better
protected.

-John O
 
This is possibly BIOS-dependent, or that CPU was hitting
its heat threshold very quickly. Hard to say without
monitoring the CPU temp I suppose.

I did all my crazy stuff with an Intel DG965SS mobo.
Typical shutdown was after about 3-4 minutes. I do know
that trying this with an older AMD is likely to result in
a quick fire and total destruction of the CPU and
motherboard, wish I had one to try. :-) I think their new
stuff is better protected.
Click to expand...

Yes my AMD dual-core 3800+ shut down when the pump for the
liquid-coolant stopped working (loose connector nothing
major). But I didn't try again and timed it, I need the PC :-)


-John O
Click to expand...



Dragomir Kollaric[/QUOTE]
 
I don't know wether my fault was a motherboard or CPU. I just replaced with
new motherboard, CPU (from 2.8GHz to 2.2GHz dual core) and RAM (1Gb to 2Gb
plus faster bus speed) because it's hard to get components for older
systems. Plus side is, the computer runs cooler (down side in winter) and
much faster. I also lost a motherboard IDE controller and gained 4 SATA
controllers (had to put one IDE drive and DVD drive on motherboard
connector, SATA drive from PCI controller to motherboard, remaining IDE
drives on PCI controller and disconnect ZIP drive), lost PCI slots,
different sound setup. Also did fresh install of XP Pro.
 
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