boot question

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

Will a computer boot if the cmos battery is dead?
or the other way round,
Can a dead cmos battery stop a computer from booting?

 

[jad]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

I had an HP recently that would not boot unless a battery was in place good
or bad..

"Mike Hollywood" <noone@nowheret.net> wrote in message
news:TrudnV7Cctyfk5DeRVn-vQ@comcast.com...
> Will a computer boot if the cmos battery is dead?
> or the other way round,
> Can a dead cmos battery stop a computer from booting?
>

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

"Mike Hollywood" <noone@nowheret.net> wrote in message
news:TrudnV7Cctyfk5DeRVn-vQ@comcast.com...
> Will a computer boot if the cmos battery is dead?
> or the other way round,
> Can a dead cmos battery stop a computer from booting?
If the battery it totally dead then the computer should boot, but I have had
multiple motherboards with weak, dying, or shorted batteries in them that
caused corrupted CMOS every time the boards were booted.

After removal of the suspect batteries and either by using the CMOS reset
jumper or manually shutting down the power supplies for a couple of minutes
the boards were reset. After installing new batteries the boards were put
back into service.

 

[ken]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

Mike Hollywood wrote:
> Will a computer boot if the cmos battery is dead?
> or the other way round,
> Can a dead cmos battery stop a computer from booting?
>
>

Packard Bell used to have some models that would refuse to boot if the
CMOS battery was not good. A somewhat weak one might boot until it
reached a certain point, but below that point the MB acted as if it were
dead.

Ken

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

In article <TrudnV7Cctyfk5DeRVn-vQ@comcast.com>, Mike Hollywood says...
> Will a computer boot if the cmos battery is dead?
> or the other way round,
> Can a dead cmos battery stop a computer from booting?
>
Yes it will, although it will probably be only from the floppy unless
the hard drive settings default to autodetect in BIOS.


--
Conor

The child is grown, the dream is gone.
I have become comfortably numb. - Pink Floyd

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

The reason I asked the question was a friend brougt over a box that wouldn't
boot.
I measered the voltages and all were within specs. The keyboard flashed
when
you turned it on, but no post. You know how you pull this out and that out
until
you have a basic system? I did that, reseated everything etc., and
concluded the
mobo or CPU had failed, and I don't know how to test either. She took the
computer back to the owner and gave him my diagnoses.

Thinking about it later, I remembered I didn't test the cmos battery, and
wondered
if that could cause it not to boot. It's like it hangs after about 2
seconds of being on;
power supply fan is spinning, votages are applied, one red light on the mobo
is
glowing, but that's it. It's a 4 year old Dell Dimension.

Mike

 

[BigJim]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

the machine will go into the cmos with a dead battery most of the time
and request resetting it. If it booted into the cmos then the problems are
else where
"Mike Hollywood" <noone@nowheret.net> wrote in message
news:28udnZ2dnZ2gDQfknZ2dnbCdk96dnZ2dRVn-yp2dnZ0@comcast.com...
> The reason I asked the question was a friend brougt over a box that
> wouldn't boot.
> I measered the voltages and all were within specs. The keyboard flashed
> when
> you turned it on, but no post. You know how you pull this out and that
> out until
> you have a basic system? I did that, reseated everything etc., and
> concluded the
> mobo or CPU had failed, and I don't know how to test either. She took the
> computer back to the owner and gave him my diagnoses.
>
> Thinking about it later, I remembered I didn't test the cmos battery, and
> wondered
> if that could cause it not to boot. It's like it hangs after about 2
> seconds of being on;
> power supply fan is spinning, votages are applied, one red light on the
> mobo is
> glowing, but that's it. It's a 4 year old Dell Dimension.
>
> Mike
>

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

Nope, it wouldn't boot into the CMOS. It didn't got
that far in the boot sequence.



"BigJIm" <woody10277@hotmail.com> wrote in message
news:jtidnasgUfQ_g5PeRVn-NrA@comcast.com...
> the machine will go into the cmos with a dead battery most of the time
> and request resetting it. If it booted into the cmos then the problems are
> else where
> "Mike Hollywood" <noone@nowheret.net> wrote in message
> news:28udnZ2dnZ2gDQfknZ2dnbCdk96dnZ2dRVn-yp2dnZ0@comcast.com...
>> The reason I asked the question was a friend brougt over a box that
>> wouldn't boot.
>> I measered the voltages and all were within specs. The keyboard flashed
>> when
>> you turned it on, but no post. You know how you pull this out and that
>> out until
>> you have a basic system? I did that, reseated everything etc., and
>> concluded the
>> mobo or CPU had failed, and I don't know how to test either. She took
>> the
>> computer back to the owner and gave him my diagnoses.
>>
>> Thinking about it later, I remembered I didn't test the cmos battery, and
>> wondered
>> if that could cause it not to boot. It's like it hangs after about 2
>> seconds of being on;
>> power supply fan is spinning, votages are applied, one red light on the
>> mobo is
>> glowing, but that's it. It's a 4 year old Dell Dimension.
>>
>> Mike
>>
>
>