[tomanderson]

Really resurrecting this thread.

Long time reader, first time poster, a lot of the threads in here have been a lifesaver and I am having a similar problem to the OP of this thread and thought it was better to resurrect it rather than starting a new one.

If I have missed a post addressing a similar issue please let me know as there is nothing worse than the ol "help my computer is broken but I can not read" post.

Finally really stripped the machine down after reading the above, on some cardboard and when I put my processor in it turns on and off (noted by fan powering on and off)
When the processor comes out the fan powers up no problem, no beeps whatsoever.

The motherboard is currently connected to 4-5 items.
24 and 6 pin power from power supply
1 of the noctua fans (plugged into the CPU_Fan power outlet on the MB
The small bundle of cables connecting the MB to the power buttons, PC beep speaker, etc.
The CPU, when out it starts up, fan motors away no problem. CPU goes back in the fan powers up for about 1s then goes off for 2-3, then repeats.
At no time are there any beeps from the MB.

Is it possible I got a bad processor?

Many thanks for anyone that has a minute to impart some knowledge and to those of you who have contributed to other threads that I have leeched information from over the last couple of years.


Almost forgot here are the specs, fresh from newegg. Item #s are from newegg if you are curious about the actual specs of each item.



ASUS ENGTX275/HTDI/896MD3 GeForce GTX 275 896MB 448-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card
Item #:N82E16814121313


Intel Core i7 920 Nehalem 2.66GHz LGA 1366 130W Quad-Core Processor Model BX80601920

Intel Core i7 920 2.66GHz LGA 1366 130W Quad-Core Processor
Item #:N82E16819115202


PC Power & Cooling S75QB 750W ATX12V / EPS12V SLI NVIDIA SLI Certified
Item #:N82E16817703009

ASUS P6T LGA 1366 Intel X58 ATX Intel Motherboard
Item #:N82E16813131359


NEC Black Internal Floppy Drive Model FD1231M
Item #:N82E16821152006


Rosewill RCR-102 52-in-1 USB 2.0 3.5" Internal Card Reader w/ USB port
Item #:N82E16820223073



SAMSUNG 22X DVD±R DVD Burner with LightScribe Black IDE Model SH-S222L
Item #:N82E16827151176
x2


ASUS Xonar DX 7.1 Channels PCI Express Interface Sound Card
Item #:N82E16829132006




LG W2453V-PF Black 24" 2ms(GTG) Full HD 1080P Widescreen LCD Monitor
Item #:N82E16824005126


Noctua NH-U12P SE1366 120mm SSO CPU Cooler
Item #:N82E16835608007




CORSAIR XMS3 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Triple Channel Kit Desktop Memory
Item #:N82E16820145222
x2 so 12 gigs



XION XON-MTR001B Color LCD Thermal Control Panel
Item #:N82E16811998050

Western Digital VelociRaptor WD3000HLFS 300GB 10000 RPM SATA 3.0Gb/s

Western Digital VelociRaptor 300GB 3.5" SATA 3.0Gb/s Hard Drive
Item #:N82E16822136322


LIAN LI PC-61 USB Black Aluminum ATX Mid Tower Computer Case
Item #:N82E16811112025

 

[tomanderson]

Re: Just built and the computer powers on and off in 3 second intervals

I also hooked up my graphics card just now without any power to it and got some beeps (did it to test that I would get system beeps and had the speaker correctly attached)

 

[Amd_Man]

Re: Computer won't start properly

Did you hook up the 8pin +12v to the motherboard?

 

[tomanderson]

Re: Computer won't start properly

I did plug in the 8 pin, and the 24 pin.

 

[Tumbleweed36]

Re: Computer won't start properly

Pull the memory out, turn it on and and see if it beeps at you.

 

[Tumbleweed36]

Re: Computer won't start properly

Did you use Artic Silver thermal paste or what solution did you use? It almost sounds like you have either a overheating issue (either thermal paste issue or CPU not clamped clear down in) or another possibility is that you might be shorting out because one of your motherboard posts (standoffs) either in the wrong place or do not have them lined up. (there should be about 9 posts in there, one for every hole and no more, and no less)

If it is overheating, You might have to redo the thermal paste.

Tell us step by step, what happens when you turn it on. Example - I turn it on and it starts, but before it goes on or gets to a post beep, it turns off and then restarts...ect...you get the picture on how to explain it. We need to get this one narrowed down some.

 

[tomanderson]

Re: Computer won't start properly

The memory has been out for testing.
I used the Noctua NT-H1 thermal paste that came with my CPU cooler.
As I said before I ran these tests outside of the case eliminating the chance that 9 posts could be causing a short.

With the processor, 8pin, 24pin, and 1 fan attached to MB (NOTHING else, no ram, vid card etc)
I turn it on.
It powers up for about 1-1.5s (I can tell as I have a fan attached to easily monitor the power).
Then shuts off and remains of for 1-2s
Then repeats, turns on, then off.

When I REMOVE the processor, leaving in the 8pin, 24pin, and 1 fan attached to MB (NOTHING else, no ram, vid card etc)
It powers on, fan runs consistently, stays on until I turn it off.


At no point are there any beeps from the MB, again I left the graphics card plugged in, not powered earlier today to ensure the MB beeps could be heard.

Had to work a double shift tonight and am in no shape to work on a machine, thanks for the input looking forward to any thoughts you later nighters might have.

 

[dai]

Re: Computer won't start properly

did you take the plastic film off the cpu before applying the paste

 

[tomanderson]

Re: Computer won't start properly

Sure did.

 

[tomanderson]

Re: Computer won't start properly

With no beeps coming from the MB and the symptoms above I am tempted to say the processor was DOA although I have never run into that before.

 

[dai]

Re: Computer won't start properly

do you hear the bios error beeps if you start with no ram in

 

[tomanderson]

Re: Computer won't start properly

No, currently there is no ram in the system and it does not beep

 

[dai]

Re: Computer won't start properly

see if you can get a 850w or better psu to try in it

 

[tomanderson]

Re: Computer won't start properly

I will see what I can do, when reading up on this MB, processor etc I was under the impression that a 650 would be enough so I went ahead and got a 750 to be sure. I will see if I can get my hands on an 850 but it will most likely mean ordering a new one which may take me a few days.

 

[dai]

Re: Computer won't start properly

on the nvidia site in the specs it recommends 550+ for the card usually adding 50% puts you in the ballpark
it lists it's top end at over 200w from experience we usually know this equates out at a 850 or better

 

[tomanderson]

Re: Computer won't start properly

Gotcha, I have an 850 on the way, I just don't see how a 650 would not be enough when literally there is only 1 small fan and the CPU plugged into the MB.

 

[dai]

Re: Computer won't start properly

it is the video card and the cpu that pull the majority of fthe power power

 

[tomanderson]

Re: Computer won't start properly

Yea the processor and video card are hogs, I just can not believe it will not power with no HD/DVD/Graphics card etc etc.

 

[dai]

Re: Computer won't start properly

it will not post without the video min components are

cpu
ram
video
speaker so you can hear the bios beep codes

 

[tomanderson]

Re: Computer won't start properly

Yup just tried it again with the following plugged plugged into the motherboard.
cpu
ram
video
speaker

Same thing, the system powers on for about 1s, spins the fans etc, lights up the lights on the power/reset buttons (on the case connected by pins to speaker, reset, power buttons)
Then the power goes off, fans spin down etc.
About 1s later the process starts over, no beeps at any time.