I am building a Penryn 9650 system with the Asus PK5 Deluxe
motherboard. I have a 500 watt PSU, ThermalTake Silent 775D hs/fan,
pretty standard equipment otherwise. What's happening is the computer
boots momentarily, and then the CPU shuts off. After a few seconds,
the CPU fires up again and then shuts down again. Any ideas as to why
this would happen?
"jbrandonbb@gmail.com" <johnmbrandon@gmail.com> wrote in message
news:d5c6c963-b320-44be-b7bd-20c9113a793b@v67g2000hse.googlegroups.com...
>I am building a Penryn 9650 system with the Asus PK5 Deluxe
> motherboard. I have a 500 watt PSU, ThermalTake Silent 775D hs/fan,
> pretty standard equipment otherwise. What's happening is the computer
> boots momentarily, and then the CPU shuts off. After a few seconds,
> the CPU fires up again and then shuts down again. Any ideas as to why
> this would happen?
>
> - JB
Interesting question. How do you know that the CPU fires up again and then
shuts down again? I've never seen a CPU with any kind of built-in activity
indicator, like LED lights or anything. I'm not being sarcastic, I need you
to better define your terms so I know what the heck you are talking about.
Are you guessing by fan activity that the CPU is on and off? Are you
guessing by lights on the mainboard that the CPU is on and off?
Don't say what you think is happening, post exactly what IS happening, so
that we can help you.
Start with the power switch. Push that momentarily to turn system on. Fans
spin? Beep code from mainboard? Any lights on anywhere? Hear hard drive
spinning up? What is displayed on monitor, if anything? Details!!! -Dave
"jbrandonbb@gmail.com" <johnmbrandon@gmail.com> wrote in message
news:d5c6c963-b320-44be-b7bd-20c9113a793b@v67g2000hse.googlegroups.com...
>I am building a Penryn 9650 system with the Asus PK5 Deluxe
> motherboard. I have a 500 watt PSU, ThermalTake Silent 775D hs/fan,
> pretty standard equipment otherwise. What's happening is the computer
> boots momentarily, and then the CPU shuts off. After a few seconds,
> the CPU fires up again and then shuts down again. Any ideas as to why
> this would happen?
>
> - JB
On Jan 12, 6:04 am, "Ed Medlin" <e...@edmedlin.com> wrote:
> "jbrando...@gmail.com" <johnmbran...@gmail.com> wrote in message
>
> news:d5c6c963-b320-44be-b7bd-20c9113a793b@v67g2000hse.googlegroups.com...
>
> >I am building a Penryn 9650 system with the Asus PK5 Deluxe
> > motherboard. I have a 500 watt PSU, ThermalTake Silent 775D hs/fan,
> > pretty standard equipment otherwise. What's happening is the computer
> > boots momentarily, and then the CPU shuts off. After a few seconds,
> > the CPU fires up again and then shuts down again. Any ideas as to why
> > this would happen?
>
> > - JB
>
> First bet would be a faulty power supply.
>
> Ed
I have tried two, one was 380 and this one is 500. Do I need higher?
On Jan 11, 6:43 pm, "Dave" <no...@nohow.not> wrote:
> "jbrando...@gmail.com" <johnmbran...@gmail.com> wrote in message
>
> news:d5c6c963-b320-44be-b7bd-20c9113a793b@v67g2000hse.googlegroups.com...
>
> >I am building a Penryn 9650 system with the Asus PK5 Deluxe
> > motherboard. I have a 500 watt PSU, ThermalTake Silent 775D hs/fan,
> > pretty standard equipment otherwise. What's happening is the computer
> > boots momentarily, and then the CPU shuts off. After a few seconds,
> > the CPU fires up again and then shuts down again. Any ideas as to why
> > this would happen?
>
> > - JB
>
> Interesting question. How do you know that the CPU fires up again and then
> shuts down again? I've never seen a CPU with any kind of built-in activity
> indicator, like LED lights or anything. I'm not being sarcastic, I need you
> to better define your terms so I know what the heck you are talking about.
>
> Are you guessing by fan activity that the CPU is on and off? Are you
> guessing by lights on the mainboard that the CPU is on and off?
>
> Don't say what you think is happening, post exactly what IS happening, so
> that we can help you.
>
> Start with the power switch. Push that momentarily to turn system on. Fans
> spin? Beep code from mainboard? Any lights on anywhere? Hear hard drive
> spinning up? What is displayed on monitor, if anything? Details!!! -Dave
The fans spin up fine, no beep codes, lights on (mainboard and
chassis). The HDD does not spin as far as I can tell. There is nothing
on the video but I have it hooked up correctly. Does the CPU need a
more powerful fan combo? Is it not seated correctly somehow? Do i need
a bigger PSU than 500?
> On Jan 11, 6:43 pm, "Dave" <no...@nohow.not> wrote:
>> "jbrando...@gmail.com" <johnmbran...@gmail.com> wrote in message
>> >I am building a Penryn 9650 system
Apparently that "Penryn 9650" is a CPU. Make sure the Asus PK5
mainboard supports it. You could try a BIOS update.
>> > boots momentarily, and then the CPU shuts off. After a few
>> > seconds, the CPU fires up again and then shuts down again.
>> > - JB
>> Interesting question. How do you know that the CPU fires up
>> again and then shuts down again?
He's a Google Groups user.
>> Are you guessing by fan activity that the CPU is on and off? Are
>> you guessing by lights on the mainboard that the CPU is on and
>> off?
>>
>> Don't say what you think is happening, post exactly what IS
>> happening, so that we can help you.
> The fans spin up fine, no beep codes, lights on (mainboard and
> chassis).
How do you know the CPU is on and off?
> The HDD does not spin as far as I can tell. There is nothing on
> the video but I have it hooked up correctly.
Once again, that's what you think. What video card? Have you
attached the secondary power connector that comes through a power
supply cable to the video card?
> Does the CPU need a more powerful fan combo? Is it not seated
> correctly somehow?
Only you can answer that.
> Do i need a bigger PSU than 500?
Whatever "bigger" means. That figure "500" is almost meaningless.
Just like everything else, there can be a huge difference in quality
between one unit and another, regardless of the alleged wattage
rating.
>
> The fans spin up fine, no beep codes, lights on (mainboard and
> chassis). The HDD does not spin as far as I can tell. There is nothing
> on the video but I have it hooked up correctly. Does the CPU need a
> more powerful fan combo? Is it not seated correctly somehow? Do i need
> a bigger PSU than 500?
OK, now we're getting somewhere. Fans are very forgiving. Unless a power
supply is totally dead, fans will spin. Same with lights on mainboard and
chassis, both require almost no power to light up. If you are getting NO
BEEP AT ALL, that is a problem. One of the last parts of POST is to
initialize a video card, so if there is no POST beep, it is obvious that you
will get no video, as that comes much later in the process.
Do you need a bigger PSU than 500, is not the question you should ask. You
should ask if your power supply is compatible with your CPU, video card and
all other hardware. 500 would probably do it, IF the power supply is good
quality. But most power supplies are crap, so even a 700 might not be
enough. ESPECIALLY if all you know about the power supply is the number
that the manufacturer pulled out of it's *** to try to represent it.
Post the exact make and model number of the power supply. Your symptom (or
lack of symptoms) suggests that CPU is not receiving power_OK, and thus the
POST is not running. Most likely suspects in order are weak power supply
(99.9%), bad motherboard, bad CPU, or CPU incompatible with
ainboard. -Dave
On Jan 12, 2:37 pm, "Dave" <no...@nohow.not> wrote:
> > The fans spin up fine, no beep codes, lights on (mainboard and
> > chassis). The HDD does not spin as far as I can tell. There is nothing
> > on the video but I have it hooked up correctly. Does the CPU need a
> > more powerful fan combo? Is it not seated correctly somehow? Do i need
> > a bigger PSU than 500?
>
> OK, now we're getting somewhere. Fans are very forgiving. Unless a power
> supply is totally dead, fans will spin. Same with lights on mainboard and
> chassis, both require almost no power to light up. If you are getting NO
> BEEP AT ALL, that is a problem. One of the last parts of POST is to
> initialize a video card, so if there is no POST beep, it is obvious that you
> will get no video, as that comes much later in the process.
>
> Do you need a bigger PSU than 500, is not the question you should ask. You
> should ask if your power supply is compatible with your CPU, video card and
> all other hardware. 500 would probably do it, IF the power supply is good
> quality. But most power supplies are crap, so even a 700 might not be
> enough. ESPECIALLY if all you know about the power supply is the number
> that the manufacturer pulled out of it's *** to try to represent it.
>
> Post the exact make and model number of the power supply. Your symptom (or
> lack of symptoms) suggests that CPU is not receiving power_OK, and thus the
> POST is not running. Most likely suspects in order are weak power supply
> (99.9%), bad motherboard, bad CPU, or CPU incompatible with
> ainboard. -Dave
I am using a Seasonic SS700HM - an 80-Plus unit that says 500 watts. I
had a 380watt PSU I was trying before. Both of these worked fine with
an AMD 4000+ CPU on another build. By the way, how do you flash the
BIOS -- do you need the video signal and HDDD working for that?
Anyway, thanks for your help. It sounds like I should first try a more
powerful and better CPU.
> >> > boots momentarily, and then the CPU shuts off. After a few
> >> > seconds, the CPU fires up again and then shuts down again.
> >> > - JB
> >> Interesting question. How do you know that the CPU fires up
> >> again and then shuts down again?
>
> He's a Google Groups user.
And proud of it. It means I can use any PC, it logs me in
automatically, has good spell check, etc. Is there a requirement here
about which newsreader you use?
>
> >> Are you guessing by fan activity that the CPU is on and off? Are
> >> you guessing by lights on the mainboard that the CPU is on and
>
> How do you know the CPU is on and off?
How else would you know? The fan turns on, it has power.
>
> > The HDD does not spin as far as I can tell. There is nothing on
> > the video but I have it hooked up correctly.
>
> Once again, that's what you think. What video card? Have you
> attached the secondary power connector that comes through a power
> supply cable to the video card?
It is not a matter of what I think when it comes to the video signal.
There is nothing on the screen. If I had not attached power, there
would be a long piercing tone.
>
> > Does the CPU need a more powerful fan combo? Is it not seated
> > correctly somehow?
>
> Only you can answer that.
Not really -- it can be answered if you know the specs for the
mainboard I mentioned and its requirements for power, which must be
available somewhere but I have not been able to find it yet.
>
> > Do i need a bigger PSU than 500?
>
> Whatever "bigger" means. That figure "500" is almost meaningless.
> Just like everything else, there can be a huge difference in quality
> between one unit and another, regardless of the alleged wattage
> rating.
Most people know that bigger means more powerful -- higher wattage.
Most people know that the 500 is a wattage rating, it is far from
almost meaningless. I can't think of a single thing in your post that
was helpful in any way.
>
> I am using a Seasonic SS700HM - an 80-Plus unit that says 500 watts. I
> had a 380watt PSU I was trying before. Both of these worked fine with
> an AMD 4000+ CPU on another build. By the way, how do you flash the
> BIOS -- do you need the video signal and HDDD working for that?
> Anyway, thanks for your help. It sounds like I should first try a more
> powerful and better CPU.
OK, we can assume that the power supply is probably OK. To flash the BIOS,
you don't need a hard drive, but you do need video. The question is moot
anyway. If you could get the system running well enough to flash the BIOS,
you probably would not need to flash the BIOS. Triple-check that your CPU
is compatible with your mainboard. -Dave
Computer stops right at boot 
Linear Mode
