Question about Intel ASUS P4S800-MX SiS661FX Motherboard for Socket 478 CPU -RETAIL (ASUSP4S800BOARD)

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Changed out power supply, now can't get video to work

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Pls ckh ur power supply 5v 12v again other wise change power supply.
pls, chk it is at,or atx power supply.
or ur mother disply ic is damage
inset new display card.

Posted on Feb 23, 2010


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you have a power supply partial failure if you know how to safely check your power supply check the voltages, swolen capacitors etc. leaking capicators are usually the problem. if you know nothing about power supplies do not look at the tv without the tv unplugged! better yet; have the supply repaired by a professional. a power supply can kill you!

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I change the power supply cause its not work and now its ok but there nothing display on the screen only the word say power seving

Assuming that you have correctly hooked up the power supply and that when you turn on the computer the power supply powers up as well as the CPU fan and the hard drive spins up, you have a video problem. While this COULD be because of a bad power supply, I think there is another hardware issue here.
You say you changed the power supply because it didn't work. I'd ask why didn't it work--did it suddenly make a popping sound or did you smell burning electronics? If so, when it failed, it may have taken part of the motherboard with it.
If you have an integrated motherboard (the video is actually part of the motherboard), then that is probably the issue here.
Just to be sure, disconnect everything BUT the CPU and memory and video. Then try to start it. If you see something on the screen (like a message telling you there is no boot device) then you can assume the hard drive or CD has gone bad. Reconnect the hard drive to see if it starts. Then the CD.
If you fail to get any image on the screen, assume that your motherboard is shot.

Mar 21, 2012 | Gigabyte GA-G41M-ES2L Motherboard

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No video, i try unplgu power cord and power supply conectors, change microprocessor,change power supply, change memmory modules, clear cmos


either your video card is faulty or if its build into the mainboard then most likely the mainboard is faulty.

Jan 30, 2011 | Biostar U8668D (802700113338) Motherboard

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Power supply is good, fans running - no display on

make sure to check the video cable (DVI,VGA,HDMI) if properly connected

if youre using an independent video card and your motherboard has a builtin try to use the integrated to check if the video card is faulty

if you dont have a video card and using the integrated the motherboard might be faulty


Jul 20, 2010 | Asrock P4I45GV R5 Motherboard

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Wii suddenly stopped working and will not switch on anymore. when we now plug in the red standby light is on then when i switch power on this goes out and no light is showing have tried alternative powere...

It sounds like an issue with the power supply. Strictly speaking, I've had little experience Wii console hardware, but in my dealings with other electronic devices and video game systems those symptoms would indicate the power supply board has shorted. Just my guess, though. Sorry I couldn't give you better news!

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Check if the power supply is working. If it does not working then it is the power supply. Change the motherboard power supply.

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I turn the power on and the light blinks thre times and thats it. Nothing else. The only thing was DTV was disconnected from it and then, nada.

There only two possible prob.First change the power supply board,dosen't work,must change the main backlight video board,with the old power board?Don't work,than must change both new power supply board and the main backlight video board.Sometime both boards is dead require both that why u must buy both for troubleshoot,have backup board and ready to trouble and repair right away.U can will able to return board the that purcharse for 5% or 10% restocking fee later.

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1 Answer

Power Supply and Video keep going out.

I would suggest that you try and check the system with another power pack, just to be sure that it is not the power supply that is faulty.
This is because what you have describe here is one of the symptoms of a failing power supply, and It is not always advisable to take a power supply case lightly, and when it is detected that its the one that is faulty, Just change the power pack OUTRIGHT! and please don't think of repairing it. It is not always expensive though, as compared to if your whole system now starts to develop fault because of it.
Hope this helps you out.

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