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Computer Desktop Problem (detailed)

Hello, thank you for offering your help first of all. Now on to business... I have a desktop, with an Asus P5N32SLISEDEL motherboard. It was from alienware. Last week, I was playing a game, when suddenly, it froze and a constant single-tone noise sound was going on in my headphone. Out of distress I pressed the power button on my pc for 5 seconds and it shut down. Ever since, it has refused to turn back on.
I called a friend, and he, through the phone did some serious troubleshooting, but failed to come to a solution. Now, my PC symptoms are this: I turn on the PC, and all the fans turn on, all the lights turn on too, and I can hear the hdd's spin, I can also open and close the dvd drive. That's about it. The monitor refuses to turn on, the computer doesn't go through POST either, keyboard fails to light up even for a split second and there's no hdd activity other than spin, (aka the power button doesn't blink like it usually does when there's activity). I have already tested out a new power supply, and that was not it. I have tried a new video card, and that was not it. I did the Mobo battery deal, nothing. I resetted the mobo, nothing. I have run out of ideas and would like to get this going so I can go back to my schoolwork and gaming. Thanks, and sorry for the extremely long message.

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According to symptoms we can consider two things:-
1) Problem with SMPS power supply
2) Problem with Motherboard display IC

1) SMPS problem -
As per your sayying, you had replaced the powersupply and tested it.
If new power supply SMPS is perfect then there may not be any issue with this thing
So to workout on it i would suggest that to Remove RAM from your system + remove CMOS 3V battery and restart your system.
So due to absence of RAM system will give 3 small beep sounds and take a pause (If internal speaker is connected then only you will be able te hear beep)

This signifies that your motherboard is working super fine
If you are not able to hear any beep sound even though you have connected internal speaker then there must be issue with motherboard

Thanks, and sorry for the extremely long message. :-)

Posted on Jun 02, 2008

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