Computer is not posting. Please help

[McCartney]

Hi there guys,

Quick diagnosis of my problem: I power on my computer, It turns on and everything is as should be when it boots up, but the problem is that the 8800 GTS Fan doesn't slow down (Which would be the typical part, since it starts powered at full speed then slows down to hit post and from there on is stress-dependent). The computer just will not post. Everything is getting adequate power. Specs:

OCZ StealthXStream 600W PUS
eVGA 8800 GTS 640MB Video Card
Asus P5N32-E PLUS 680i Chipset board.
Crucial Ballistix 2x1GB PC2-6400
1 Seagate 500 GB 7200.10 HD
1 WD 400GB 7200 RPM HD
Intel Core 2 Quad Q6600 stock cooler
4 Case Fans (Vantec branded, 3 pin, all plugged into the OPT_FAN outlets aorund the board)
Silverstone LC20M VD/IR Case
Onboard HD-Audio.


I am wondering what to do. I have independently tried to isolate everything, I've tried all slots on the PCI-E graphics cards. I've removed all HD's and tried running the computer with JUST the video card and no go. Anyone have a suggestion? I'm pretty sure it's the power supply I'm just wondering if anyone can confirm my diagnosis. The computer boots up fine won't hit post though. I've tried leaving the CMOS battery out for 15 minutes that did not help.

Has anyone had this problem?

 

[onlyCOpunk]

Have you done anything differently that might have caused this, or is this a new build?

 

[McCartney]

new build

 

[seemingly random]

Sounds frustrating for such a nice build. I'm assuming that these are all new/untested parts, that the monitor is known to be good, that you're not seeing any video (monitor power light turn on after a few seconds?) let alone the bios screen and that when you say it boots fine, you hear fans spinning up. If you don't have access to another pc that you can test at least the gpu, I would, after a thorough visual inspection for installation errors:

- remove the mb from the case to eliminate a possible short - place it on cardboard
- if it's being used, remove the Q-connector from the mb system panel connector
- if possible, find a speaker to attach to the mb system panel connector for system error codes
- test with just cpu/hsf/ram/gpu/monitor/kbd/psu - use a screwdriver to momentarily short the mb power button pins to turn it on
- try with just one stick of ram - and then the other - in different slots
- search Asus forums for similar experiences
- if none of this helps then the parts must be tested individually in another known good pc

I have an Asus m2n-sli-deluxe that is currently acting flaky with regards to using the power button to shut down - it just shuts off immediately. I'm going to have to go through similar steps...

 

[McCartney]

Great advice.
I did try with and without the q connector -- no dice.
The motherboard is fine I'm certain but I will try it without the case.
i tried barebones just the stuff I need to post and it still made the same error, regardless of what was attached
One stick of ram, tried it, also tried using knowingly good ram and did not work either.

gonna search on their forum right now -- thanks for the advice.

I think I'm gonna test another PSU and case for this cpu

Thanks

Anymore suggestions please advise!

 

[jkresh]

are you sure that the stock heatsink is properly seated (if its not the quad will get very hot very fast and not boot). Also are you positive your asus board has a bios that recognizes quad cores? its possible the bios revision it shipped with doesn't and you need to boot off of a dual core and update before trying with the quad.

 

[seemingly random]

Originally posted by: McCartney
The motherboard is fine I'm certain but I will try it without the case.

With an elusive problem I'll sometimes remove the mb from the case because of the inherent changes that occur. For example, I had a pc with an ATI RS480 mb that I installed a GPU in - it worked fine. At one point, I booted with a monitor hooked only to the IGP - nothing to the GPU and the pc appeared not to boot - lights were on but nobody was home. Spent a lot of time trying to figure out why and then removed mb which of course required GPU removal and things worked again. It was working the whole time - the mb didn't have the intelligence to enable the IGP when there was no monitor attached to the GPU.

Why the confidence that the mb is fine?

Any beep codes from the speaker?

Does the GPU work in another pc?

 

[McCartney]

it seems to be the board alot of people are having htis problem hmm