Question about Soyo KT400 Chipset MotherboardAMD Socket A CPU, Model "SY-KT400 DRAGON Ultra(Platinum Edition)" -RET... (SYKT400DU)

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No beeps, No video but fans and lights come on...

I rescently bought an intel pearl creek clssic series DG31PR motherboard and after assembling it...nothing. The lights and fans went on but the BIOS didnt show because there was no video on top of that the regulatory BEEP was'nt produced by the motherboard speaker.

Oh and the LEDs come on when the power is turned on including the one's on the board and on the case as well. i've tried disconnecting and connecting numerous times....HELP!!! I have the same symptoms here. No video and no beeps (except when I power off case)< but motherboard lights. This system ran fine for a year or so then it slowly started having issues.These may not be in the correct order , but I had onboard sound issues and added a sound card , thenI loat omboard usb ports and added a usb card, then I had a hard drive failure, and finally the video card failed. I replaced the video card and still nothing. The power supply tested fine with my meter. I removed ram one at a time, I have reset the cmos, and still nothing. I am trying to determine whether the problem is the Athlon xp2600 cpu or the board which has no bad physical signs. I have no spares to swap out for testing, Due to the prior failures I am leaning toward a bad motherboard. Does anyone have any other ideas or comments.


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I have had a Soyo KT400 for many years. My daughter used it in school, and it developed problems. They were cured when I took it apart and vacuumed it thoroughly. I recently decided to use it again, and it would not post. I removed the fan from the AMD heatsink and vacuumed the heatsink directly; the board posted immediately afterward. The problem may be sensitivity to high temperatures at the heat sink, but each time I have had a problem, cleaning has been the solution.


Posted on Jul 08, 2009

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Do you have a graphics card installed in the AGP or PCIE slot on *********** board?
If so take that out and test to see if the computer beeps. If it does it could be your graphics card.

Posted on Feb 27, 2009


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The problem could be a ram module failing, or the graphic card if installed on the mainboard.
Or a short circuit somewhere.

Look also here:

Try starting with only 1 stick of Ram, the monitor and the keyboard connected, no other USBs to be connected.

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