Start automatically--didn't display anything

July 4, 2011 at 07:24:51
Specs: windows xp sp2
When i plug the computer automatically turns on without pressing power button and not display anything on screen, restart button and power button also didn't work. I think it's the motherboard. Any suggestions?

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July 4, 2011 at 07:34:04
Is this a new system? if not give us a little background.

We can not fight new wars with old weapons, let he who desires peace prepare for war - PROPHET.

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July 4, 2011 at 08:04:53
Whether your computer attempts to turn on automatically can depend on settings in the mboard's bios Setup.
E.g.- if it is set to power on when AC power is restored, but that's not a default setting.

Some desktop mboard bios versions cause the computer to start up briefly when the power supply receives AC power after that having having been off, regardless of settings in the mboard's bios Setup, but then the mboard shuts off, if there's nothing wrong.
If that applies to your mboard, that would have happened when the computer was working fine.

The computer does not have a Restart button, but if it's a desktop computer it might have a Reset button.
If the operating system is not working properly, or if there is some hardware problem, pressing the Reset button often does not work.

However, also depending on a setting in the mboard's bios Setup, usually, by default, holding the Power button in (or down) for at least 4 seconds shuts off the mboard.

You have not provided enough information.

People often think there is something wrong with their motherboard or the cpu (processor) on it when their computer won't work properly, but in most cases there's nothing wrong with those - usually something else is causing the problem.

What is the make and model of the brand name computer, or if you have a generic desktop computer, what is the make and model of the motherboard ?

Was this same computer working fine previously ?

If yes, have you just made any changes to it , or have you been fiddling around with anything inside the case if it's a desktop computer, wiring connections or components, before your present situation ?

Did you have any symptoms of something being wrong for a short time, or for a while, before this present situation ?
If so, describe them, in as much detail as you can come up with.

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July 4, 2011 at 10:03:53
Motherboard model is ASRock K8NF3-VSTA,is new. How to enter the BIOS if it does not show anything on screen? I didn't made any change in system,i never open them.

I had a motherboard that burned because of power fluctuations

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Related Solutions

July 4, 2011 at 10:51:33
Power failure events or power surges or power spikes or voltage fluctuations can damage a mboard, or anything installed on it or connected to it, but they're even more likely to damage the power supply.
Also, failing power supplies are common, and can cause symptoms that may make you assume the mboard is dead.
If you have not replaced the power supply, if you can, try connecting a known good power supply to your system, from another computer of yours or a friend's ,or try your power supply with a working system.

Did you unplug the computer's power supply, or otherwise switch off the AC power to it ,at ALL times, when you were fiddling with components and connections inside the case regarding the replacement motherboard ?

Make sure the ram is seated properly.
Unplug it, plug it back in if that doesn't help.

Your ram may have been damaged.
Try the no ram test.

Make sure you have a speaker or speakers or the equivalent connected to the mboard so you can hear mboard beeps (see your mboard manual if you need to).
Remove the AC power to the case/power supply.
Remove all the ram.
Restore AC power.
Try to boot.
If nothing else is wrong, you will get no video but you will hear a pattern of beeps that indicate no ram is installed, or a ram problem.
E.g. for an Award bios or a bios based on one, that's often a beep of about a half second, silence for a half second, a beep of about a half second, silence for a half second, continuously.

Your replacement mboard

does not have onboard video.
Are you using a video card that was installed in the previous mboard, or a different one ?
If you are using a video card that was installed in the previous mboard when it supposedly failed, the video card t may be damaged - can you try installing it in another working computer to see if it still works ?
Or - do you have another video card that you could try in your mboard ?

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July 4, 2011 at 12:55:13
Is the original video card, I had on old motherboard.

I examined the motherboard and found two chips numbered Q16, Q17 with traces of burning.I circled in yellow ->
This one is the problem?

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July 4, 2011 at 18:57:50
Can you try the video card in another working mboard ?
Can you try another video card in the replacement mboard ?

Those are probably voltage regulators that you have circled - if so, they output an accurate voltage, from a higher input voltage - maybe for the CPU voltage(s).
It's normal for them to get hotter than other components on the mboard - they are soldered to a relatively large area of trace material so they transfer heat to the mboard better (in a power supply they're often mounted on a heat sink because more current can go through them there) . The surface of the chip may get discolored because of that.
They're not particularly delicate, An AC power problem is much more likely to damage something else.

If you are using the same power supply...

can you try it with another working mboard ?

Can you try a known good power supply from a wiorking system wiith the replacement mboard.

Have you tried the no ram installed test for the replacement mboard ?

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