🚀 go-pugleaf

<BertieBigBollox@gmail.com> wrote in message 
news:1188839156.666331.197160@r29g2000hsg.googlegroups.com...
> OK. So if the mobo detects a CPU fan fails it powers off the
> system....
>
> Would a faulty CPU fan mean that a mobo wont even power up or will it
> try and start everything first and then power off ?
>
Most will attempt to turn the fans for a split second, then shut down 

On 3 Sep, 18:19, "JAD" <john d...@harvesting.addys.for.porn.spam>
wrote:
> <BertieBigBol...@gmail.com> wrote in message
>
> news:1188839156.666331.197160@r29g2000hsg.googlegroups.com...> OK. So if the mobo detects a CPU fan fails it powers off the
> > system....
>
> > Would a faulty CPU fan mean that a mobo wont even power up or will it
> > try and start everything first and then power off ?
>
> Most will attempt to turn the fans for a split second, then shut down

Not a peep from any fans....

In alt.comp.hardware.pc-homebuilt "BertieBigBollox@gmail.com"
<BertieBigBollox@gmail.com> wrote:

>On 3 Sep, 18:19, "JAD" <john d...@harvesting.addys.for.porn.spam>
>wrote:
>> <BertieBigBol...@gmail.com> wrote in message
>>
>> news:1188839156.666331.197160@r29g2000hsg.googlegroups.com...> OK. So if the mobo detects a CPU fan fails it powers off the
>> > system....
>>
>> > Would a faulty CPU fan mean that a mobo wont even power up or will it
>> > try and start everything first and then power off ?
>>
>> Most will attempt to turn the fans for a split second, then shut down
>
>Not a peep from any fans....

If it doesn't find the fan connected, it won't try.
OTOH, the way it finds the fan *is* connected, is by sending power and
seeing if the speed-counter is detected.

So, if the other fans don't spin, it's likely something else wrong.
Bad PSU or a short will do that.
Without hitting the power-switch, do any LEDs at all light up on the
motherboard?

Try removing *everything* except for the CPU from the board, and
mounting it on a non-conducting surface when powering up.  See if that
gets fans to spin for a second before the system decides "No Memory".

Then, if that works, try adding memory, then video-board, etc., one at a
time.

If it don't, try a new PSU.

-- 
    _____
     /  '               / ™
  ,-/-, __  __.  ____  /_ 
 (_/   / (_(_/|_/ / <_/ <_

 Frank McCoy <mccoyf@millcomm.com> wrote:

>>> > Would a faulty CPU fan mean that a mobo wont even power up or will it
>>> > try and start everything first and then power off ?

>>> Most will attempt to turn the fans for a split second, then shut down

>If it doesn't find the fan connected, it won't try.
>OTOH, the way it finds the fan *is* connected, is by sending power and
>seeing if the speed-counter is detected.

News to me, learned something new today.

You can view the RPM of the fans and TEMPs of various areas with
Everest http://www.majorgeeks.com/download4181.html

-- 
Largest Super Computer now online 
http://tinyurl.com/2cvd3h

On 3 Sep, 20:57, Frank McCoy <mcc...@millcomm.com> wrote:
> In alt.comp.hardware.pc-homebuilt "BertieBigBol...@gmail.com"
>
> <BertieBigBol...@gmail.com> wrote:
> >On 3 Sep, 18:19, "JAD" <john d...@harvesting.addys.for.porn.spam>
> >wrote:
> >> <BertieBigBol...@gmail.com> wrote in message
>
> >>news:1188839156.666331.197160@r29g2000hsg.googlegroups.com...> OK. So if the mobo detects a CPU fan fails it powers off the
> >> > system....
>
> >> > Would a faulty CPU fan mean that a mobo wont even power up or will it
> >> > try and start everything first and then power off ?
>
> >> Most will attempt to turn the fans for a split second, then shut down
> If it doesn't find the fan connected, it won't try.
> OTOH, the way it finds the fan *is* connected, is by sending power and
> seeing if the speed-counter is detected.

Confused now? So if there is no processor fan connected it will try to
start?

>
> So, if the other fans don't spin, it's likely something else wrong.
> Bad PSU or a short will do that.
> Without hitting the power-switch, do any LEDs at all light up on the
> motherboard?

LED on the mobo.

>
> Try removing *everything* except for the CPU from the board, and
> mounting it on a non-conducting surface when powering up.  See if that
> gets fans to spin for a second before the system decides "No Memory".
>
>

No fans at all....


> If it don't, try a new PSU.

Same with new PSU.

BertieBigBollox@gmail.com wrote:

> 
> LED on the mobo.
> 

There are some power supplies, that when they blow, they take
out the motherboard. There is one guy who visits these groups
occasionally, who refurbishes old computers, and I think he
can suggest a few of the "fatal" brands of power supplies. I
don't know all of them off hand. A lot of modern power supplies
behave reasonably when they fail, and don't put a transient
into the motherboard. There are some older ones, that do.

    Paul

In alt.comp.hardware.pc-homebuilt "BertieBigBollox@gmail.com"
<BertieBigBollox@gmail.com> wrote:

>On 3 Sep, 20:57, Frank McCoy <mcc...@millcomm.com> wrote:
>> In alt.comp.hardware.pc-homebuilt "BertieBigBol...@gmail.com"
>>
>> <BertieBigBol...@gmail.com> wrote:
>> >On 3 Sep, 18:19, "JAD" <john d...@harvesting.addys.for.porn.spam>
>> >wrote:
>> >> <BertieBigBol...@gmail.com> wrote in message
>>
>> >>news:1188839156.666331.197160@r29g2000hsg.googlegroups.com...> OK. So if the mobo detects a CPU fan fails it powers off the
>> >> > system....
>>
>> >> > Would a faulty CPU fan mean that a mobo wont even power up or will it
>> >> > try and start everything first and then power off ?
>>
>> >> Most will attempt to turn the fans for a split second, then shut down
>> If it doesn't find the fan connected, it won't try.
>> OTOH, the way it finds the fan *is* connected, is by sending power and
>> seeing if the speed-counter is detected.
>
>Confused now? So if there is no processor fan connected it will try to
>start?
>
>>
>> So, if the other fans don't spin, it's likely something else wrong.
>> Bad PSU or a short will do that.
>> Without hitting the power-switch, do any LEDs at all light up on the
>> motherboard?
>
>LED on the mobo.
>
>>
>> Try removing *everything* except for the CPU from the board, and
>> mounting it on a non-conducting surface when powering up.  See if that
>> gets fans to spin for a second before the system decides "No Memory".
>>
>>
>
>No fans at all....
>
>
>> If it don't, try a new PSU.
>
>Same with new PSU.

Try removing and replacing the CPU; making sure no bent or broken pins
or other similar problems.

If it still don't work; then likely you have a fried motherboard.

-- 
    _____
     /  '               / ™
  ,-/-, __  __.  ____  /_ 
 (_/   / (_(_/|_/ / <_/ <_

<BertieBigBollox@gmail.com> wrote in message 
news:1188895640.727174.13840@50g2000hsm.googlegroups.com...
> On 3 Sep, 20:57, Frank McCoy <mcc...@millcomm.com> wrote:
>> In alt.comp.hardware.pc-homebuilt "BertieBigBol...@gmail.com"
>>
>> <BertieBigBol...@gmail.com> wrote:
>> >On 3 Sep, 18:19, "JAD" <john d...@harvesting.addys.for.porn.spam>
>> >wrote:
>> >> <BertieBigBol...@gmail.com> wrote in message
>>
>> >>news:1188839156.666331.197160@r29g2000hsg.googlegroups.com...> OK. So if the mobo 
>> >>detects a CPU fan fails it powers off the
>> >> > system....
>>
>> >> > Would a faulty CPU fan mean that a mobo wont even power up or will it
>> >> > try and start everything first and then power off ?
>>
>> >> Most will attempt to turn the fans for a split second, then shut down
>> If it doesn't find the fan connected, it won't try.
>> OTOH, the way it finds the fan *is* connected, is by sending power and
>> seeing if the speed-counter is detected.
>
> Confused now? So if there is no processor fan connected it will try to
> start?
>
>>
>> So, if the other fans don't spin, it's likely something else wrong.
>> Bad PSU or a short will do that.
>> Without hitting the power-switch, do any LEDs at all light up on the
>> motherboard?
>
> LED on the mobo.
>
>>
>> Try removing *everything* except for the CPU from the board, and
>> mounting it on a non-conducting surface when powering up.  See if that
>> gets fans to spin for a second before the system decides "No Memory".
>>
>>
>
> No fans at all....
>
>
>> If it don't, try a new PSU.
>
> Same with new PSU.
>

down to the CPU or MB, reseat the CPU as the last resort. have you RESET the CMOS, 
grasping at straws,,,,,,,,,,,,,,,,,,,,CMOS battery is good?