Please Help??
> I have an A7v8X ASUS motherboard. Whilst waiting for a new hard drive to
> arrive to replace the previously failed one (even though it was only 2 weeks
> old) I changed the CPU fan (and heatsink) for a quieter one. When I plugged i
> the new one the computer powered up but wouldn't boot. Fans were turning,
> could just about make out a sound or too from the hard drive (not sure) but
> the monitor was lifeless apart from the standby light.
> Tested the PSU voltages and got the following:-
> Purple 5.28V
> Green 5.28V dropping to 0.08V on power up
> Grey >2.4V
> Orange rising to 3.98V
> Red rising to 5.2V
> Yellow rising to 12V
>
> Does this sound like a faulty motherboard?
>
> Can anyone help pinpoint the problem- all help gratefully received -
> thanks!!

"woof!" <(E-Mail Removed)> wrote in message
news:8FDBC253-3FEE-4D8F-92E8-(E-Mail Removed)...
> Please Help??
>> I have an A7v8X ASUS motherboard. Whilst waiting for a new hard drive to
>> arrive to replace the previously failed one (even though it was only 2
>> weeks
>> old) I changed the CPU fan (and heatsink) for a quieter one. When I
>> plugged i
>> the new one the computer powered up but wouldn't boot. Fans were turning,
>> could just about make out a sound or too from the hard drive (not sure)
>> but
>> the monitor was lifeless apart from the standby light.
>> Tested the PSU voltages and got the following:-
>> Purple 5.28V
>> Green 5.28V dropping to 0.08V on power up
>> Grey >2.4V
>> Orange rising to 3.98V
>> Red rising to 5.2V
>> Yellow rising to 12V
>>
>> Does this sound like a faulty motherboard?
>>
>> Can anyone help pinpoint the problem- all help gratefully received -
>> thanks!!
>

I don't know enough about PSU voltages but Green dropping from 5.28V to
0.08V on power up looks decidedly dodgy to me. Either the PSU is faulty or
you damaged something on the mobo when fitting the new heatsink and fan.

As your problem is not a hardware issue with WindowsXP you'd be better off
posting to a NG such as uk.comp.homebuilt

HTH

Godfrey

Godfrey Wilkes wrote:
> "woof!" <(E-Mail Removed)> wrote in message
> news:8FDBC253-3FEE-4D8F-92E8-(E-Mail Removed)...
>> Please Help??
>>> I have an A7v8X ASUS motherboard. Whilst waiting for a new hard drive to
>>> arrive to replace the previously failed one (even though it was only 2
>>> weeks
>>> old) I changed the CPU fan (and heatsink) for a quieter one. When I
>>> plugged i
>>> the new one the computer powered up but wouldn't boot. Fans were turning,
>>> could just about make out a sound or too from the hard drive (not sure)
>>> but
>>> the monitor was lifeless apart from the standby light.
>>> Tested the PSU voltages and got the following:-
>>> Purple 5.28V
>>> Green 5.28V dropping to 0.08V on power up
>>> Grey >2.4V
>>> Orange rising to 3.98V
>>> Red rising to 5.2V
>>> Yellow rising to 12V
>>>
>>> Does this sound like a faulty motherboard?
>>>
>>> Can anyone help pinpoint the problem- all help gratefully received -
>>> thanks!!
>
> I don't know enough about PSU voltages but Green dropping from 5.28V to
> 0.08V on power up looks decidedly dodgy to me. Either the PSU is faulty or
> you damaged something on the mobo when fitting the new heatsink and fan.
>
> As your problem is not a hardware issue with WindowsXP you'd be better off
> posting to a NG such as uk.comp.homebuilt
>
> HTH
>
> Godfrey
>
>

Green is PS_ON#. It is a logic signal. +5V level means "OFF". A voltage
near zero volts means "ON". The signal is sent by the motherboard, to
the PSU. That part is normal.

Orange is the 3.3V rail. A value of 3.98 is too high. 3.3V +/- 5% has
been exceeded.

The specs here are in chronological order. The power supply in question
could be one of the last two links.

http://web.archive.org/web/200304240...12V_PS_1_1.pdf
http://www.formfactors.org/developer...X12V_1_3dg.pdf
http://www.formfactors.org/developer...public_br2.pdf

I'd be reaching for my spare power supply at this point. Unless you
want to spend more time poking the thing with the multimeter.

Either the 12V rail is heavily loaded, or there is a rail to rail fault
that is causing the 3.3V to go out of regulation (lifting the rail). If
the spare power supply displays the same voltage pattern (3.3V too high),
debugging what is wrong is going to get a lot tougher. At that point, I'd
be using a clamp-on DC ammeter to check the magnitude and direction of
current flow for each rail.

Paul

Thanks
i shall take a good look at this tonight.
Let you know more when I have got my head around it
if it makes any difference the power supply (which was bought just 4 weeks
ago from maplin) is a ATX-500TD "X-Power"

36A on +3.3V and on +5V
20A on +12V
1A on -5V and -12V
2A on +5Vsb

thanks again
"Paul" wrote:

> Godfrey Wilkes wrote:
> > "woof!" <(E-Mail Removed)> wrote in message
> > news:8FDBC253-3FEE-4D8F-92E8-(E-Mail Removed)...
> >> Please Help??
> >>> I have an A7v8X ASUS motherboard. Whilst waiting for a new hard drive to
> >>> arrive to replace the previously failed one (even though it was only 2
> >>> weeks
> >>> old) I changed the CPU fan (and heatsink) for a quieter one. When I
> >>> plugged i
> >>> the new one the computer powered up but wouldn't boot. Fans were turning,
> >>> could just about make out a sound or too from the hard drive (not sure)
> >>> but
> >>> the monitor was lifeless apart from the standby light.
> >>> Tested the PSU voltages and got the following:-
> >>> Purple 5.28V
> >>> Green 5.28V dropping to 0.08V on power up
> >>> Grey >2.4V
> >>> Orange rising to 3.98V
> >>> Red rising to 5.2V
> >>> Yellow rising to 12V
> >>>
> >>> Does this sound like a faulty motherboard?
> >>>
> >>> Can anyone help pinpoint the problem- all help gratefully received -
> >>> thanks!!
> >
> > I don't know enough about PSU voltages but Green dropping from 5.28V to
> > 0.08V on power up looks decidedly dodgy to me. Either the PSU is faulty or
> > you damaged something on the mobo when fitting the new heatsink and fan.
> >
> > As your problem is not a hardware issue with WindowsXP you'd be better off
> > posting to a NG such as uk.comp.homebuilt
> >
> > HTH
> >
> > Godfrey
> >
> >
>
> Green is PS_ON#. It is a logic signal. +5V level means "OFF". A voltage
> near zero volts means "ON". The signal is sent by the motherboard, to
> the PSU. That part is normal.
>
> Orange is the 3.3V rail. A value of 3.98 is too high. 3.3V +/- 5% has
> been exceeded.
>
> The specs here are in chronological order. The power supply in question
> could be one of the last two links.
>
> http://web.archive.org/web/200304240...12V_PS_1_1.pdf
> http://www.formfactors.org/developer...X12V_1_3dg.pdf
> http://www.formfactors.org/developer...public_br2.pdf
>
> I'd be reaching for my spare power supply at this point. Unless you
> want to spend more time poking the thing with the multimeter.
>
> Either the 12V rail is heavily loaded, or there is a rail to rail fault
> that is causing the 3.3V to go out of regulation (lifting the rail). If
> the spare power supply displays the same voltage pattern (3.3V too high),
> debugging what is wrong is going to get a lot tougher. At that point, I'd
> be using a clamp-on DC ammeter to check the magnitude and direction of
> current flow for each rail.
>
> Paul
>

Woof

Take care how you deal with the power supply unit if you wish to make a
warranty claim.


--



Hope this helps.

Gerry
~~~~
FCA
Stourport, England
Enquire, plan and execute
~~~~~~~~~~~~~~~~~~~

woof! wrote:
> Thanks
> i shall take a good look at this tonight.
> Let you know more when I have got my head around it
> if it makes any difference the power supply (which was bought just 4
> weeks ago from maplin) is a ATX-500TD "X-Power"
>
> 36A on +3.3V and on +5V
> 20A on +12V
> 1A on -5V and -12V
> 2A on +5Vsb
>
> thanks again
> "Paul" wrote:
>
>> Godfrey Wilkes wrote:
>>> "woof!" <(E-Mail Removed)> wrote in message
>>> news:8FDBC253-3FEE-4D8F-92E8-(E-Mail Removed)...
>>>> Please Help??
>>>>> I have an A7v8X ASUS motherboard. Whilst waiting for a new hard
>>>>> drive to arrive to replace the previously failed one (even though
>>>>> it was only 2 weeks
>>>>> old) I changed the CPU fan (and heatsink) for a quieter one. When
>>>>> I plugged i
>>>>> the new one the computer powered up but wouldn't boot. Fans were
>>>>> turning, could just about make out a sound or too from the hard
>>>>> drive (not sure) but
>>>>> the monitor was lifeless apart from the standby light.
>>>>> Tested the PSU voltages and got the following:-
>>>>> Purple 5.28V
>>>>> Green 5.28V dropping to 0.08V on power up
>>>>> Grey >2.4V
>>>>> Orange rising to 3.98V
>>>>> Red rising to 5.2V
>>>>> Yellow rising to 12V
>>>>>
>>>>> Does this sound like a faulty motherboard?
>>>>>
>>>>> Can anyone help pinpoint the problem- all help gratefully
>>>>> received - thanks!!
>>>
>>> I don't know enough about PSU voltages but Green dropping from
>>> 5.28V to
>>> 0.08V on power up looks decidedly dodgy to me. Either the PSU is
>>> faulty or you damaged something on the mobo when fitting the new
>>> heatsink and fan.
>>>
>>> As your problem is not a hardware issue with WindowsXP you'd be
>>> better off posting to a NG such as uk.comp.homebuilt
>>>
>>> HTH
>>>
>>> Godfrey
>>>
>>>
>>
>> Green is PS_ON#. It is a logic signal. +5V level means "OFF". A
>> voltage near zero volts means "ON". The signal is sent by the
>> motherboard, to the PSU. That part is normal.
>>
>> Orange is the 3.3V rail. A value of 3.98 is too high. 3.3V +/- 5% has
>> been exceeded.
>>
>> The specs here are in chronological order. The power supply in
>> question could be one of the last two links.
>>
>> http://web.archive.org/web/200304240...12V_PS_1_1.pdf
>> http://www.formfactors.org/developer...X12V_1_3dg.pdf
>> http://www.formfactors.org/developer...public_br2.pdf
>>
>> I'd be reaching for my spare power supply at this point. Unless you
>> want to spend more time poking the thing with the multimeter.
>>
>> Either the 12V rail is heavily loaded, or there is a rail to rail
>> fault that is causing the 3.3V to go out of regulation (lifting the
>> rail). If the spare power supply displays the same voltage pattern
>> (3.3V too high), debugging what is wrong is going to get a lot
>> tougher. At that point, I'd be using a clamp-on DC ammeter to check
>> the magnitude and direction of current flow for each rail.
>>
>> Paul

I would look carefully around the cpu socket to see if you perhaps shorted
something w/ the new heatsink. Or the cpu may be twisting in the socket
because of an alignment issue w/ the new heatsink, causing a pin contact
issue.

good luck

Had chance to have another look. Had a very close inspection of the
motherboard and see nothing untoward. looked at the CPU again everything
looks as it should. Re-tested the voltages and got the following:-
Purple: 5.16V
Grey:0.00 rising to 4.96V when power on
Red: 0.02 rising to 5.14V when power on
Orange: 0.00 rising to 3.36V when power on
light Grey moving from 0.00 to -4.9V when power on
Green 5.16 dropping to 0.04V when power turned on
Blue: 0.00 dropping to -11.8V when power turned on

This all looks to agree with guidance. Admittedly slightly less than I
measured last night but that may well be due to a stressful day!?!!

Thinking of ordering new CPU and motherboard and working off that.
Disconnected and reconnected graphics just to see if that made any difference
and it didn't.

Anyone got ay more ideas? all appreciated, especiallu help so far - thanks!

"(E-Mail Removed)" wrote:

> I would look carefully around the cpu socket to see if you perhaps shorted
> something w/ the new heatsink. Or the cpu may be twisting in the socket
> because of an alignment issue w/ the new heatsink, causing a pin contact
> issue.
>
> good luck
>
>

Missed the yellow voltage this is 0.00 rising to 12.14V when power turned on
ta


"woof!" wrote:

> Had chance to have another look. Had a very close inspection of the
> motherboard and see nothing untoward. looked at the CPU again everything
> looks as it should. Re-tested the voltages and got the following:-
> Purple: 5.16V
> Grey:0.00 rising to 4.96V when power on
> Red: 0.02 rising to 5.14V when power on
> Orange: 0.00 rising to 3.36V when power on
> light Grey moving from 0.00 to -4.9V when power on
> Green 5.16 dropping to 0.04V when power turned on
> Blue: 0.00 dropping to -11.8V when power turned on
>
> This all looks to agree with guidance. Admittedly slightly less than I
> measured last night but that may well be due to a stressful day!?!!
>
> Thinking of ordering new CPU and motherboard and working off that.
> Disconnected and reconnected graphics just to see if that made any difference
> and it didn't.
>
> Anyone got ay more ideas? all appreciated, especiallu help so far - thanks!
>
> "(E-Mail Removed)" wrote:
>
> > I would look carefully around the cpu socket to see if you perhaps shorted
> > something w/ the new heatsink. Or the cpu may be twisting in the socket
> > because of an alignment issue w/ the new heatsink, causing a pin contact
> > issue.
> >
> > good luck
> >
> >

>> > "woof!" <(E-Mail Removed)> wrote in message
>> > news:8FDBC253-3FEE-4D8F-92E8-(E-Mail Removed)...
>> >> Please Help??
>> >>> I have an A7v8X ASUS motherboard. Whilst waiting for a new hard drive
>> >>> to
>> >>> arrive to replace the previously failed one (even though it was only
>> >>> 2
>> >>> weeks
>> >>> old) I changed the CPU fan (and heatsink) for a quieter one. When I
>> >>> plugged i
>> >>> the new one the computer powered up but wouldn't boot. Fans were
>> >>> turning,
>> >>> could just about make out a sound or too from the hard drive (not
>> >>> sure)
>> >>> but
>> >>> the monitor was lifeless apart from the standby light.
>> >>> Tested the PSU voltages and got the following:-
>> >>> Purple 5.28V
>> >>> Green 5.28V dropping to 0.08V on power up
>> >>> Grey >2.4V
>> >>> Orange rising to 3.98V
>> >>> Red rising to 5.2V
>> >>> Yellow rising to 12V
>> >>>
>> >>> Does this sound like a faulty motherboard?
>> >>>
>> >>> Can anyone help pinpoint the problem- all help gratefully received -
>> >>> thanks!!


"woof!" <(E-Mail Removed)> wrote in message
news:E1D28DE9-6145-4E27-B8A3-(E-Mail Removed)...
> Thanks
> i shall take a good look at this tonight.
> Let you know more when I have got my head around it
> if it makes any difference the power supply (which was bought just 4 weeks
> ago from maplin) is a ATX-500TD "X-Power"
>
> 36A on +3.3V and on +5V
> 20A on +12V
> 1A on -5V and -12V
> 2A on +5Vsb
>
> thanks again



"woof!" <(E-Mail Removed)> wrote in message
news:0A93A9A8-E3B6-46DE-A652-(E-Mail Removed)...
> Had chance to have another look. Had a very close inspection of the
> motherboard and see nothing untoward. looked at the CPU again everything
> looks as it should. Re-tested the voltages and got the following:-
> Purple: 5.16V
> Grey:0.00 rising to 4.96V when power on
> Red: 0.02 rising to 5.14V when power on
> Orange: 0.00 rising to 3.36V when power on
> light Grey moving from 0.00 to -4.9V when power on
> Green 5.16 dropping to 0.04V when power turned on
> Blue: 0.00 dropping to -11.8V when power turned on
>
> This all looks to agree with guidance. Admittedly slightly less than I
> measured last night but that may well be due to a stressful day!?!!
>
> Thinking of ordering new CPU and motherboard and working off that.
> Disconnected and reconnected graphics just to see if that made any
> difference
> and it didn't.
>
> Anyone got ay more ideas? all appreciated, especiallu help so far -
> thanks!


woof:
It's really hard, if not impossible, to determine what is the cause of your
problem without replacing each major component on a one-by-one basis. It
might be the PSU, or something went awry when you replaced the CPU fan &
heatsink. Or it could be the motherboard itself. There's really no
definitive way of telling by the end-user without the replacement of
components as I've indicated.

Anyway...

You indicate the problem arose when you installed your new HDD to replace
the "failed" one. I take it there's little doubt in your mind that the
*previous* problem you were experiencing was due to a defective HDD, and has
*nothing* to do with your present problem, right?

So after installing the new HDD you booted with your XP installation CD to
install the OS, that's when the problem arose. When you say the system
"wouldn't boot ", you mean it wouldn't boot to the XP installation CD,
right? You never were able to get as far as installing the OS, right? I
assume you don't have another HDD with a functioning OS on it, do you?

Anyway...

I know I don't have to tell you that you're dealing with a pretty old
motherboard, do I? That ASUS board *was* a fine MB in its day, but
truth-to-tell its day has kind of come & gone. If the system is working and
meets your day-to-day needs with that MB, fine. But since you've indicated
you're thinking of a new motherboard & processor, is there any chance you
could *really* upgrade your system with a new more up-to-day MB & processor,
etc. (At least you have a new HDD, right?). If you could (financially) swing
to a new system, I really think that's the way to go at this point.
Anna

Wise words!!
I am a bit like a dog and his bone - I dont want to let go and let this
beat me. I was looking at a slightly better motherboard the A7n8X and CPU to
match as it would let me use all my existing cards etc.
Don't suppose you could offer an opinion as to if I am continuing to wade
through mud?

"Anna" wrote:

>
> >> > "woof!" <(E-Mail Removed)> wrote in message
> >> > news:8FDBC253-3FEE-4D8F-92E8-(E-Mail Removed)...
> >> >> Please Help??
> >> >>> I have an A7v8X ASUS motherboard. Whilst waiting for a new hard drive
> >> >>> to
> >> >>> arrive to replace the previously failed one (even though it was only
> >> >>> 2
> >> >>> weeks
> >> >>> old) I changed the CPU fan (and heatsink) for a quieter one. When I
> >> >>> plugged i
> >> >>> the new one the computer powered up but wouldn't boot. Fans were
> >> >>> turning,
> >> >>> could just about make out a sound or too from the hard drive (not
> >> >>> sure)
> >> >>> but
> >> >>> the monitor was lifeless apart from the standby light.
> >> >>> Tested the PSU voltages and got the following:-
> >> >>> Purple 5.28V
> >> >>> Green 5.28V dropping to 0.08V on power up
> >> >>> Grey >2.4V
> >> >>> Orange rising to 3.98V
> >> >>> Red rising to 5.2V
> >> >>> Yellow rising to 12V
> >> >>>
> >> >>> Does this sound like a faulty motherboard?
> >> >>>
> >> >>> Can anyone help pinpoint the problem- all help gratefully received -
> >> >>> thanks!!
>
>
> "woof!" <(E-Mail Removed)> wrote in message
> news:E1D28DE9-6145-4E27-B8A3-(E-Mail Removed)...
> > Thanks
> > i shall take a good look at this tonight.
> > Let you know more when I have got my head around it
> > if it makes any difference the power supply (which was bought just 4 weeks
> > ago from maplin) is a ATX-500TD "X-Power"
> >
> > 36A on +3.3V and on +5V
> > 20A on +12V
> > 1A on -5V and -12V
> > 2A on +5Vsb
> >
> > thanks again
>
>
>
> "woof!" <(E-Mail Removed)> wrote in message
> news:0A93A9A8-E3B6-46DE-A652-(E-Mail Removed)...
> > Had chance to have another look. Had a very close inspection of the
> > motherboard and see nothing untoward. looked at the CPU again everything
> > looks as it should. Re-tested the voltages and got the following:-
> > Purple: 5.16V
> > Grey:0.00 rising to 4.96V when power on
> > Red: 0.02 rising to 5.14V when power on
> > Orange: 0.00 rising to 3.36V when power on
> > light Grey moving from 0.00 to -4.9V when power on
> > Green 5.16 dropping to 0.04V when power turned on
> > Blue: 0.00 dropping to -11.8V when power turned on
> >
> > This all looks to agree with guidance. Admittedly slightly less than I
> > measured last night but that may well be due to a stressful day!?!!
> >
> > Thinking of ordering new CPU and motherboard and working off that.
> > Disconnected and reconnected graphics just to see if that made any
> > difference
> > and it didn't.
> >
> > Anyone got ay more ideas? all appreciated, especiallu help so far -
> > thanks!
>
>
> woof:
> It's really hard, if not impossible, to determine what is the cause of your
> problem without replacing each major component on a one-by-one basis. It
> might be the PSU, or something went awry when you replaced the CPU fan &
> heatsink. Or it could be the motherboard itself. There's really no
> definitive way of telling by the end-user without the replacement of
> components as I've indicated.
>
> Anyway...
>
> You indicate the problem arose when you installed your new HDD to replace
> the "failed" one. I take it there's little doubt in your mind that the
> *previous* problem you were experiencing was due to a defective HDD, and has
> *nothing* to do with your present problem, right?
>
> So after installing the new HDD you booted with your XP installation CD to
> install the OS, that's when the problem arose. When you say the system
> "wouldn't boot ", you mean it wouldn't boot to the XP installation CD,
> right? You never were able to get as far as installing the OS, right? I
> assume you don't have another HDD with a functioning OS on it, do you?
>
> Anyway...
>
> I know I don't have to tell you that you're dealing with a pretty old
> motherboard, do I? That ASUS board *was* a fine MB in its day, but
> truth-to-tell its day has kind of come & gone. If the system is working and
> meets your day-to-day needs with that MB, fine. But since you've indicated
> you're thinking of a new motherboard & processor, is there any chance you
> could *really* upgrade your system with a new more up-to-day MB & processor,
> etc. (At least you have a new HDD, right?). If you could (financially) swing
> to a new system, I really think that's the way to go at this point.
> Anna
>
>
>