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Computer refuses to POST


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#1 benlee10

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Posted 02 March 2010 - 03:12 AM

Hi guys,

First time poster here! :D

Well, my problem now is the computer boots up, fan and LEDs are spinning, everything is normal except that the computer does not go into POST.

It simply hangs at a black screen.

Nothing was changed, it was working perfectly fine last night at 3am (it's 4pm here as I post), fully able to play CoD: MW2.


What I've tried:

1) Removing the RAM and powering on the computer. Beeping sounds are heard.

2) Replacing the RAM and removing the graphic card. No beeping sound to signify it's going to POST.

3) Removing RAM and graphic card. Beeping sounds are heard.

4) Removing each piece of RAM, and testing at each RAM slot. Nothing changed.

5) Opening the DVD Drive. It works.


What else can I try/do? My hardware expertise is low - I am fully able to remove RAM, Graphic cards and CPU Heat-sink without breaking anything.


Computer Specs:

Mobo: Asus M4A785D-PRO
CPU: Phenom X2-550 3.1GHz Black Edition
RAM: Kingston Hyper-X 800-4GB kit
Graphic card: Sapphire HD 4870
Power Supply: Aerocool 550W Modular 80+

Edited by benlee10, 02 March 2010 - 03:41 AM.


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#2 hamluis

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Posted 02 March 2010 - 12:13 PM

Remove the graphics card...change the BIOS to use the onboard graphics...try a boot.

Louis

#3 benlee10

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Posted 03 March 2010 - 06:49 AM

Remove the graphics card...change the BIOS to use the onboard graphics...try a boot.

Louis


Hi Louis,

I've removed the graphics card.

There are two things that will randomly occur.


1) The computer will power on, beep, then not do anything else. The hard disk light doesn't flash.

2) The computer will power on, then nothing happens, no sound, no picture.


Please advise, how do I change the BIOS to use the onboard graphics if I can't see anything at all? :S


On a side note, the computer still sporadically works; I just used it in the morning perfectly fine, then I can't power on during the noon time :thumbsup:

#4 friarduck

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Posted 03 March 2010 - 07:01 AM

Is it a desktop?...if so it almost sounds to me that the power supply has lost +12v
You know you're getting old when the classic rock station doesn't play your classic rock anymore

#5 benlee10

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Posted 03 March 2010 - 07:05 AM

Is it a desktop?...if so it almost sounds to me that the power supply has lost +12v


Yup it's a desktop, any way I can verify that? :D

#6 friarduck

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Posted 03 March 2010 - 07:14 AM

without a voltmeter, is just to listen to verify that the hard drive is actually spinning up...the +12v usually is more or less just to operate the spin motors on the peripherals. could also be the motor itself. Not sure about dvd\CD drives..I'm inclined to think that the door servo is +5v so it may operate even if the power supply is crapping out. Just sounds to me that the computer is waiting for a ready signal from the hard drive.
You know you're getting old when the classic rock station doesn't play your classic rock anymore

#7 benlee10

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Posted 03 March 2010 - 07:24 AM

Well I can hear the hard disk spinning with the usual "scraping" sound.. Hmm.. I guess I'll just have to bring it down to a repair shop?

#8 friarduck

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Posted 03 March 2010 - 07:28 AM

I gave it a shot.. :thumbsup: Old guy here...kinda rusty)
You know you're getting old when the classic rock station doesn't play your classic rock anymore

#9 benlee10

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Posted 03 March 2010 - 07:42 AM

Still very much appreciated friarduck :thumbsup:

#10 hamluis

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Posted 03 March 2010 - 04:12 PM

Try shorting the CMOS jumper...this would reset everything to default settings.

Same thing can be accomplished by removing the CMOS battery for a few minutes/seconds.

http://pcsupport.about.com/od/fixtheproblem/tp/clearcmos.htm

Louis

#11 benlee10

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Posted 04 March 2010 - 10:50 AM

Hi Louis,

I've tried taking out the CMOS battery. It no doubt refreshed everything to it's default settings but still would not boot.

I've brought it to the DIY shop where I purchased the PC, and their conclusion is that the motherboard is dead, and are sending in a replacement.

Thanks again for the troubleshooting steps :thumbsup:


Ben

Edited by benlee10, 04 March 2010 - 10:51 AM.


#12 hamluis

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Posted 04 March 2010 - 11:44 AM

Glad you have resolution, thanks for the feedback...good luck with the replacement :thumbsup:.

Louis




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