A computer components & hardware forum. HardwareBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » HardwareBanter forum » General Hardware & Peripherals » Homebuilt PC's
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

PC power on - start, stop, start, stop, etc - eventually powers up



 
 
Thread Tools Display Modes
  #1  
Old December 26th 08, 01:03 PM posted to alt.comp.hardware.pc-homebuilt
spodosaurus
external usenet poster
 
Posts: 410
Default PC power on - start, stop, start, stop, etc - eventually powers up

Hi all,

I have a problem that has only recently started (to my knowledge) and I
can't seem to solve it. I've got a P4 3.0GHz PC with an Asis P4P800S-X
board, 512mb RAM, Thermaltake 430W PSU and geforece fx5200 graphics. The
problem is that once the system is warm (and sometimes even from cold) a
shutdown then start gets the computer spinning its fans, powering off,
spinning fans, powering off, and repeating this cycle from 1-10+ times
before actually POSTing. Once it POSTs, it's all fine. Sometimes the
brief power ons result in the drives starting to power up as well, but
usually not. I've flashed the motherboard, replaced the PSU, cleaned and
reattached the HSF, and tried it with only CPU, GPU, RAM, and Video
attached to the motherboard without success in solving this issue. I've
come accross other accounts of similar issues, but they've usually been
solved by the steps I've already taken. Any ideas on where I could go
from here?

TIA,

Ari

--
spammage trappage: remove the underscores to reply
Many people around the world are waiting for a marrow transplant. Please
volunteer to be a marrow donor and literally save someone's life:
http://www.abmdr.org.au/
http://www.marrow.org/
  #2  
Old December 26th 08, 02:05 PM posted to alt.comp.hardware.pc-homebuilt
Ed Medlin
external usenet poster
 
Posts: 601
Default PC power on - start, stop, start, stop, etc - eventually powers up


"spodosaurus" wrote in message
...
Hi all,

I have a problem that has only recently started (to my knowledge) and I
can't seem to solve it. I've got a P4 3.0GHz PC with an Asis P4P800S-X
board, 512mb RAM, Thermaltake 430W PSU and geforece fx5200 graphics. The
problem is that once the system is warm (and sometimes even from cold) a
shutdown then start gets the computer spinning its fans, powering off,
spinning fans, powering off, and repeating this cycle from 1-10+ times
before actually POSTing. Once it POSTs, it's all fine. Sometimes the brief
power ons result in the drives starting to power up as well, but usually
not. I've flashed the motherboard, replaced the PSU, cleaned and
reattached the HSF, and tried it with only CPU, GPU, RAM, and Video
attached to the motherboard without success in solving this issue. I've
come accross other accounts of similar issues, but they've usually been
solved by the steps I've already taken. Any ideas on where I could go from
here?

TIA,

Ari

--


Fans spinning up and system not posting is a classic symtom of a failed or
failing power supply. If you are sure your replacement PSU is good, it could
be a number of things including CPU and MB.


Ed

  #3  
Old December 26th 08, 03:58 PM posted to alt.comp.hardware.pc-homebuilt
Bryce
external usenet poster
 
Posts: 40
Default PC power on - start, stop, start, stop, etc - eventually powers up

spodosaurus wrote:

Hi all,

I have a problem that has only recently started (to my knowledge) and I
can't seem to solve it. I've got a P4 3.0GHz PC with an Asis P4P800S-X
board, 512mb RAM, Thermaltake 430W PSU and geforece fx5200 graphics. The
problem is that once the system is warm (and sometimes even from cold) a
shutdown then start gets the computer spinning its fans, powering off,
spinning fans, powering off, and repeating this cycle from 1-10+ times
before actually POSTing. Once it POSTs, it's all fine. Sometimes the
brief power ons result in the drives starting to power up as well, but
usually not. I've flashed the motherboard, replaced the PSU, cleaned and
reattached the HSF, and tried it with only CPU, GPU, RAM, and Video
attached to the motherboard without success in solving this issue. I've
come accross other accounts of similar issues, but they've usually been
solved by the steps I've already taken. Any ideas on where I could go
from here?

TIA,

Ari


Possibly marginal available power at boot? You didn't say how many hard
drives are connected: try with only one. Also try without the video card
installed. Watching the power supply voltages during the boot might help.

  #4  
Old December 26th 08, 04:20 PM posted to alt.comp.hardware.pc-homebuilt
spodosaurus
external usenet poster
 
Posts: 410
Default PC power on - start, stop, start, stop, etc - eventually powersup

Bryce wrote:
spodosaurus wrote:

Hi all,

I have a problem that has only recently started (to my knowledge) and I
can't seem to solve it. I've got a P4 3.0GHz PC with an Asis P4P800S-X
board, 512mb RAM, Thermaltake 430W PSU and geforece fx5200 graphics. The
problem is that once the system is warm (and sometimes even from cold) a
shutdown then start gets the computer spinning its fans, powering off,
spinning fans, powering off, and repeating this cycle from 1-10+ times
before actually POSTing. Once it POSTs, it's all fine. Sometimes the
brief power ons result in the drives starting to power up as well, but
usually not. I've flashed the motherboard, replaced the PSU, cleaned and
reattached the HSF, and tried it with only CPU, GPU, RAM, and Video
attached to the motherboard without success in solving this issue. I've
come accross other accounts of similar issues, but they've usually been
solved by the steps I've already taken. Any ideas on where I could go
from here?

TIA,

Ari


Possibly marginal available power at boot?


Doesn't even make it through post, much less all the way to boot.
However, sometimes, like right now, it went through POST and boot and is
working fine - if I restart it, though...

You didn't say how many hard
drives are connected: try with only one.


I said above that I've tried it with the bare minimum: motherboard with
only RAM, CPU, and video card. There's only one HDD attached when in
use, however.

Also try without the video card
installed. Watching the power supply voltages during the boot might help.


I guess I can always give that a try. Without the graphics card it'll
just beep.


--
spammage trappage: remove the underscores to reply
Many people around the world are waiting for a marrow transplant. Please
volunteer to be a marrow donor and literally save someone's life:
http://www.abmdr.org.au/
http://www.marrow.org/
  #5  
Old December 26th 08, 04:21 PM posted to alt.comp.hardware.pc-homebuilt
spodosaurus
external usenet poster
 
Posts: 410
Default PC power on - start, stop, start, stop, etc - eventually powersup

Ed Medlin wrote:

"spodosaurus" wrote in message
...
Hi all,

I have a problem that has only recently started (to my knowledge) and
I can't seem to solve it. I've got a P4 3.0GHz PC with an Asis
P4P800S-X board, 512mb RAM, Thermaltake 430W PSU and geforece fx5200
graphics. The problem is that once the system is warm (and sometimes
even from cold) a shutdown then start gets the computer spinning its
fans, powering off, spinning fans, powering off, and repeating this
cycle from 1-10+ times before actually POSTing. Once it POSTs, it's
all fine. Sometimes the brief power ons result in the drives starting
to power up as well, but usually not. I've flashed the motherboard,
replaced the PSU, cleaned and reattached the HSF, and tried it with
only CPU, GPU, RAM, and Video attached to the motherboard without
success in solving this issue. I've come accross other accounts of
similar issues, but they've usually been solved by the steps I've
already taken. Any ideas on where I could go from here?

TIA,

Ari

--


Fans spinning up and system not posting is a classic symtom of a failed
or failing power supply. If you are sure your replacement PSU is good,
it could be a number of things including CPU and MB.


Ed


At this point I'm guessing it has to be motherboard. The install and
updating of ubuntu went perfectly. it still runs perfectly - when it
actually gets to POST.

--
spammage trappage: remove the underscores to reply
Many people around the world are waiting for a marrow transplant. Please
volunteer to be a marrow donor and literally save someone's life:
http://www.abmdr.org.au/
http://www.marrow.org/
  #6  
Old December 26th 08, 04:32 PM posted to alt.comp.hardware.pc-homebuilt
[email protected]
external usenet poster
 
Posts: 73
Default PC power on - start, stop, start, stop, etc - eventually powersup

On Dec 26, 7:03*am, spodosaurus wrote:
I have a problem that has only recently started (to my knowledge) and I
can't seem to solve it. ... once the system is warm (and sometimes
even from cold) a shutdown then start gets the compute spinning its
fans, powering off, spinning fans, powering off, and repeating this
cycle from 1-10+ times before actually POSTing. Once it POSTs, it's
all fine.


Fans spinning up and system not posting is a classic symtom of a
failed or
failing power supply. Also a failing power supply controller. Also a
video controller problem, etc. Most things replaced and swapped
would not address those symptoms and are classicshotgunning. In some
cases, if it fixed failure, it really only cured symptoms.

First establish what is and is not working. That means numbers and
simpler facts. Havinig swapped a power supply, nobody still knows if
either power supply is good or bad. Swapping determined nothing
useful. A perfectly good supply can be defective in another machine.
And a perfectly defective power supply can boot another computer.
Without numbers from a supply when powered off and as powering on,
then nobody knows if the power supply is good. With VDC numbers from
a 3.5 digit multimter, then a power supply's state is known AND in
seconds, also known is other power supply 'system' components such as
the supply controller and power switching.

By wildly speculating, a most likely reason for failure is a power
supply controller. Without numbers, every answer will only be
speculation.

Measure VDC on the green, gray, and purple wires (power supply to
motherboard) both before and when switch is pressed. Record those
numbers. Once the system does boot, measure VDC numbers from any one
of red, orange, and yellow wires. Only with numbers can we eliminate
power supply, its controller and other power supply system components
from the list of suspects. Only then do we have something on a list of
accomplishments. Only then move on to other potential problems. Only
then has labor provided numbers so that others can reply with useful
assistance.

Most items 'fixed' may have been eliminated immediately in the
minute a multimeter was learning numbers. Get the mulitmeter so that
a next reply is informative.
  #7  
Old December 26th 08, 05:50 PM posted to alt.comp.hardware.pc-homebuilt
[email protected]
external usenet poster
 
Posts: 73
Default PC power on - start, stop, start, stop, etc - eventually powersup

On Dec 26, 9:58*am, Bryce wrote:
Possibly marginal available power at boot? *You didn't say how many hard
drives are connected: try with only one.


If one or four hard drives made a difference, then the power supply
is grossly undersized even with zero drives. And the multimeter would
have made that obvious even with zero drives connected.

But again, 'it might be hard drives' is another perfect example of
shotgunning - this time without basic knowledge of how computer power
supplies work. Disk drives do not even make a list of responsible
speculation - which would have been obvious had that reply come with
some numbers such as the power consumption by a disk drive. No
numbers; therefore wild and not useful speculation.
  #8  
Old December 27th 08, 12:07 AM posted to alt.comp.hardware.pc-homebuilt
Franc Zabkar
external usenet poster
 
Posts: 1,118
Default PC power on - start, stop, start, stop, etc - eventually powers up

On Fri, 26 Dec 2008 21:03:22 +0900, spodosaurus
put finger to keyboard and composed:

Hi all,

I have a problem that has only recently started (to my knowledge) and I
can't seem to solve it. I've got a P4 3.0GHz PC with an Asis P4P800S-X
board, 512mb RAM, Thermaltake 430W PSU and geforece fx5200 graphics. The
problem is that once the system is warm (and sometimes even from cold) a
shutdown then start gets the computer spinning its fans, powering off,
spinning fans, powering off, and repeating this cycle from 1-10+ times
before actually POSTing. Once it POSTs, it's all fine. Sometimes the
brief power ons result in the drives starting to power up as well, but
usually not. I've flashed the motherboard, replaced the PSU, cleaned and
reattached the HSF, and tried it with only CPU, GPU, RAM, and Video
attached to the motherboard without success in solving this issue. I've
come accross other accounts of similar issues, but they've usually been
solved by the steps I've already taken. Any ideas on where I could go
from here?

TIA,

Ari


It may be instructive if you can determine whether it is the
motherboard that is turning the PSU off in response to a fault
condition, or whether it is the PSU that is turning itself off in
response to a fault in the load. Or it may be that the motherboard is
resetting itself for some reason without turning off the PSU. To this
end it *might* help if you monitored the PS_ON signal (pin 14, green)
with a multimeter. A DMM may not detect rapid transitions on this pin,
though, even with a peak hold function.

See http://pinouts.ru/Power/atxpower_pinout.shtml

Does the PSU fan stop spinning, or is it only the motherboard fans
that do this?

Have you tried replacing your graphics card with a low power PCI card?

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
  #9  
Old December 27th 08, 11:55 AM posted to alt.comp.hardware.pc-homebuilt
spodosaurus
external usenet poster
 
Posts: 410
Default PC power on - start, stop, start, stop, etc - eventually powersup

wrote:
On Dec 26, 7:03 am, spodosaurus wrote:
I have a problem that has only recently started (to my knowledge) and I
can't seem to solve it. ... once the system is warm (and sometimes
even from cold) a shutdown then start gets the compute spinning its
fans, powering off, spinning fans, powering off, and repeating this
cycle from 1-10+ times before actually POSTing. Once it POSTs, it's
all fine.


Fans spinning up and system not posting is a classic symtom of a
failed or
failing power supply. Also a failing power supply controller. Also a
video controller problem, etc. Most things replaced and swapped
would not address those symptoms and are classicshotgunning. In some
cases, if it fixed failure, it really only cured symptoms.

First establish what is and is not working. That means numbers and
simpler facts. Havinig swapped a power supply, nobody still knows if
either power supply is good or bad. Swapping determined nothing
useful. A perfectly good supply can be defective in another machine.
And a perfectly defective power supply can boot another computer.
Without numbers from a supply when powered off and as powering on,
then nobody knows if the power supply is good. With VDC numbers from
a 3.5 digit multimter, then a power supply's state is known AND in
seconds, also known is other power supply 'system' components such as
the supply controller and power switching.

By wildly speculating, a most likely reason for failure is a power
supply controller. Without numbers, every answer will only be
speculation.

Measure VDC on the green, gray, and purple wires (power supply to
motherboard) both before and when switch is pressed. Record those
numbers. Once the system does boot, measure VDC numbers from any one
of red, orange, and yellow wires. Only with numbers can we eliminate
power supply, its controller and other power supply system components
from the list of suspects. Only then do we have something on a list of
accomplishments. Only then move on to other potential problems. Only
then has labor provided numbers so that others can reply with useful
assistance.

Most items 'fixed' may have been eliminated immediately in the
minute a multimeter was learning numbers. Get the mulitmeter so that
a next reply is informative.


Hi,

Thanks for the reply.

My voltages were all within 5% of nominal voltages on both PSUs - I
tested these before I did anything else. I had a PSU test okay with my
digital multimeter before, but there were fluctuations on the +5VSB line
that were causing problems that were only detected by a PSU tester that
was inaccurate and only reported to one decimal place, but it did update
frequently enough that I could see the +5VSB fluctuations. Just in case
there was a +5VSB issue, I switch the rear usb power from that line to
+5V using the motherboard's jumpers without success.

Ari

--
spammage trappage: remove the underscores to reply
Many people around the world are waiting for a marrow transplant. Please
volunteer to be a marrow donor and literally save someone's life:
http://www.abmdr.org.au/
http://www.marrow.org/
  #10  
Old December 27th 08, 12:17 PM posted to alt.comp.hardware.pc-homebuilt
spodosaurus
external usenet poster
 
Posts: 410
Default PC power on - start, stop, start, stop, etc - eventually powersup

Franc Zabkar wrote:
On Fri, 26 Dec 2008 21:03:22 +0900, spodosaurus
put finger to keyboard and composed:

Hi all,

I have a problem that has only recently started (to my knowledge) and I
can't seem to solve it. I've got a P4 3.0GHz PC with an Asis P4P800S-X
board, 512mb RAM, Thermaltake 430W PSU and geforece fx5200 graphics. The
problem is that once the system is warm (and sometimes even from cold) a
shutdown then start gets the computer spinning its fans, powering off,
spinning fans, powering off, and repeating this cycle from 1-10+ times
before actually POSTing. Once it POSTs, it's all fine. Sometimes the
brief power ons result in the drives starting to power up as well, but
usually not. I've flashed the motherboard, replaced the PSU, cleaned and
reattached the HSF, and tried it with only CPU, GPU, RAM, and Video
attached to the motherboard without success in solving this issue. I've
come accross other accounts of similar issues, but they've usually been
solved by the steps I've already taken. Any ideas on where I could go
from here?
TIA,

Ari


It may be instructive if you can determine whether it is the
motherboard that is turning the PSU off in response to a fault
condition, or whether it is the PSU that is turning itself off in
response to a fault in the load. Or it may be that the motherboard is
resetting itself for some reason without turning off the PSU. To this
end it *might* help if you monitored the PS_ON signal (pin 14, green)
with a multimeter. A DMM may not detect rapid transitions on this pin,
though, even with a peak hold function.

See http://pinouts.ru/Power/atxpower_pinout.shtml

Does the PSU fan stop spinning, or is it only the motherboard fans
that do this?


PSU, CPU (connected to motherboard), and case fan (connected to molex
from PSU).


Have you tried replacing your graphics card with a low power PCI card?

- Franc Zabkar


This last suggestion got me thinking. I didn't recall this PC having
these problems before it was given to me. I thought it was using a
different graphics card and that I'd put the FX5200 in it (turns out the
actual card was the original geforce mx4000 after all). I tried putting
in a higher powered Radeon 9600 Pro card in there and turning it on from
cold - no joy, even though it always starts when it's at room
temperature after a few hours idle. So I popped in an old PCI card - and
it started immediately even though it had been running.

I'll update this if it starts having problems again in a few hours when
I restart it after it's been running a while.

Ari

--
spammage trappage: remove the underscores to reply
Many people around the world are waiting for a marrow transplant. Please
volunteer to be a marrow donor and literally save someone's life:
http://www.abmdr.org.au/
http://www.marrow.org/
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Any way to stop power going to USB ports when PC turned off? GTS Gigabyte Motherboards 2 June 15th 08 11:56 AM
start - stop Legato DiskXtender and MediaStor Windows service in which order tomnospam Storage & Hardrives 1 June 28th 06 05:39 PM
HP5150 - OK lets stop moaning and start praising bout this beauty Russ Crowe Printers 2 September 13th 04 06:48 AM
Power On, Green, Fans Start, Fans Stop, Flash Red ...Mike Compaq Computers 1 July 11th 04 12:38 PM
strange hard drive behaviour, stop-start gwyn lintern General 4 January 7th 04 10:18 PM


All times are GMT +1. The time now is 06:39 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Copyright 2004-2022 HardwareBanter.
The comments are property of their posters.