No Post No Startup

Home built / PENTIUM 4
December 31, 2008 at 07:59:20
Specs: Windows XP, 2Gb DDR PC2700
MB-Asus P4P800-X
CPU-Pentium 4 3.4Ghz w/Hyperthread tech
MEM-2GB DDR PC2700
This system is about 5 years old and has been running great. I turned it on about a week ago and I got a message stating that my overclock settings had changed. Since I had never overclocked this system I chose to ignore changes and boot normal. The system rebooted with no post, no image. I swapped video cards with no change. I've tested my PSU and it is within specs, diconnected HD's and reseated mem and flashed my BIOS. Still no change. The last hardware change was about 1 year ago (video card). One odd thing is that while my pc was running, occasionally I would get a no signal message on my monitor, even tho I was still able to use my pc. To get rid the message I would just unplug the monitor power cord (after shut down) and then plug it back in. I do not believe this is related to my real problem tho. Any advise? K

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#1
December 31, 2008 at 08:05:09
Why would you flash the BIOS for that problem? The version you were using was obviously OK or it wouldn't have run for 5 years.

Did you follow the instructions after flashing? A the very least you must enter the BIOS and reset values. Sometimes you are instructed to clear the CMOS with the clrcmos jumper while the computer is unplugged. Some makers even instruct your to pull the 20/24 pin power connector before clearing the CMOS.

Did you get any indication that your BIOS flash was successful?


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#2
December 31, 2008 at 08:11:03
Flashing the bios was the last option as I had tried everything else that I could think of. My monitor remains blank with no indication of any post.

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#3
December 31, 2008 at 08:33:13
How did you test the PSU? Home testing is not accurate. You can see proper voltages and the PSU can still be defective.

Do you get and beeps at all? Pulling all the RAM and booting should result in an audible error code.

Try disconnecting all external hardware except a keyboard. Also disconnect from the motherboard all drive cables and USB, card readers, firewire, etc. Clear the CMOS with power disconnected. Then try booting again.

Are you getting any indication of life? Fans, lights, etc.?


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Related Solutions

#4
December 31, 2008 at 10:02:40
"I got a message stating that my overclock settings had changed."

For future refernce, a bios reset or setting the bios to the defaults would 'probably' have resolved the problem.


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#5
December 31, 2008 at 15:35:51
Apparently you missed the point. No POST, no boot up, blank screen, no access to BIOS. I just replaced the PSU with a new one and still no boot up. So.. it's not the power supply.

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#6
December 31, 2008 at 15:49:29
Apparntly you missed my point.

"I got a message stating that my overclock settings had changed."

At that time the system obviously was booting. You somehow killed the system during the process of doing all that other stuff instead of just reseting the bios.


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#7
December 31, 2008 at 16:23:18
I understand what your saying, but when I instructed my pc to ignore changes and boot normal, that is when everything went bad. Under the same circumstances you probably would have selected "Ignore changes and boot normally" too. I knew then, that I should have gone into the BIOS, but the option appeared to be a simple fix. All of the other things came after my system quit booting. I still think it is MB failure or cache module on the cpu. No matter, it's time to build something better.

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#8
December 31, 2008 at 16:43:14
Did you try what I suggested in #3?

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#9
December 31, 2008 at 17:12:07
Yes I did everything that you suggested. I even reseated my cpu. It's really perplexing. I still think MB or CPU. I've excepted that its dead, I'm just curious as to what killed it and how? Ya know.

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#10
December 31, 2008 at 17:16:13
If I can find an old PCI graphics card I can then rule out or point the finger at my AGP. I guess you can kick a dead horse only so many times before you have to pick up the saddle for yourself. LOL

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#11
December 31, 2008 at 17:50:00
This smacks of bios/cmos problems to me. I once had a similar problem with a msi board, cleared the cmos repeatedly to no effect, until I removed all the ide cables then cleared the cmos and it worked.

Try removing everything except the video card,cpu and ram then clear the cmos with the battery removed and the power supply disconnected and make sure you use the right jumper, give it a few minutes as some times the cap can be a little stubborn giving up it's charge even though it is meant to be shorted. Replace the battery, cmos jumper and power without connecting anything else and try to start it.

Since you have already screwed with the bios you may also need to recover it, asus seem quite paranoid about it a have a couple of methods to recover the bios, the bios venders have their own methods if the you want to try theirs instead http://www.bioschip.com/biosrecovery.html.

I belive http://support.asus.com/download/download.aspx?SLanguage=en-us&model=P4P800-X is the support page for your board so you can get bios, manual ect.


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#12
December 31, 2008 at 18:09:56
Removing the AGP card and booting will also generate an audible error code. Just as removing the RAM will. Doing that will get you down to the CPU or motherboard as the problem. That is assuming the PSU you swapped in was strong enough.

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#13
December 31, 2008 at 18:22:55
Sorry I forgot to mention to leave the cpu and ram in. I was refering to pci cards, HDD's ect. I meant to strip it back to the essentials...

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#14
December 31, 2008 at 19:23:26
I had this problem before. If you have disconnected everything and yes you can leave out the video card for this and you get no beeps at all then it it is either the motherboard or cpu. At least that's what tech support kept telling me. Everytime this happened I replaced the MB as it is cheaper and it turned out to be the cpu. Everytime that had been no evidence this was coming. They all shutdown normally as they always had and next time I tried to boot no post beeps.

Practice makes perfect but only if you practice perfectly!


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#15
January 1, 2009 at 15:25:24
so when you press the power button the lights turn on?

no lights no power.

lights but no boot?

bad motherboard

lights but no boot and beeps?

bad competent, check beep codes for part.


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