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Jim WhiteFlag for United States of America

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New box blues

Howdy all,
I have a white box I've put together and it's giving me fits.  I get 3 beeps when it's powered on.  I know, video or RAM.  As a test, I replaced both and still get the same result.  Nothing is loose, nothing is grounded.  There really isn't much to the machine.  Mobo, 580w PS, RAM, video card (twinhead, 1GB DDR5, 1 power connector), DVD-RW, SATA HDD, no on-board video.

It must be something stupid that I'm missing and your help is welcome.

Regards,
jwhite
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athomsfere
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Whats the motherboard or chipset?

Have you checked the POST codes for the board? What do the recommend?
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The mobo is an Intel DP55WB and chipset is the P55.  The POST codes indicate either RAM or Video.  

Thanks for the response,
Jwhite
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athomsfere
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First, confirm that the heatsink is firmly mounted (shouldn't move at all);  that you have both the ATX and CPU auxiliary power connectors firmly connected to the board;  and that the CPU fan is connected & spinning.

If those all look good, disconnect/remove everything except one RAM module and the video card.     If your video card requires an auxiliary PCIe connector, be sure that is connected.

If it still won't boot, then I'd double check your comment that "... Nothing is loose, nothing is grounded ..."  ==>  Is this based on visual inspection;  or have you tried booting with the motherboard out of the case?     The best way to absolutely confirm you don't have an impropertly placed standoff or a microscopic short is to try the system with the motherboard out of the case.     With the motherboard out of the case;  only one RAM module and a video card installed;  and the key power connections confirmed [ATX, CPU aux power; PCIe for the video card];  see if it will POST.     You can turn it on in this mode with a simple short of the power switch pins on the front panel header [Use a small flat-head screwdriver].


Resetting the RAM did the trick.  One stick apparently did not sit right and was likely the problem.  Thanks for the help.  I caused the problem by resetting and not being thorough.  Second set of eyes really helped.

Regards,
jwhite