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Only quick surge of power to motherboard

By darrenm ·
I just bought a new motherboard, a Asus p4c800 dlx. After installation when I flip the switch on the powersupply I do get the green light on the MB although when I hit the front panel power switch I only get a quick surge of power which makes the fan spin up but then immediately turn off. The green light on the MB stays on the entire time. Any clues at all?

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Only quick surge of power to motherboard

by Cr@zy@ssM@g!c!@n In reply to Only quick surge of power ...

can be a couple of things.. make sure all jumpers are in place. Make sure the cpu chip is properly inserted. Make sure Memory is installed and properly seated. Make sure a hard disk is attached and you should be cool..

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Only quick surge of power to motherboard

by darrenm In reply to Only quick surge of power ...

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Only quick surge of power to motherboard

by donmars In reply to Only quick surge of power ...

What green light on the mother board are you refering to? Does it have an integrated NIC? If it does then that green light is what that is and it is on all the time to facillitate "wake on lan" features, so you could disregard that light. You have two power switches? One on the P/S and one up front? Are you sure the switch on the power supply is not the voltage selector? Oops! That would definately provide the symptoms you describe.

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Only quick surge of power to motherboard

by donmars In reply to Only quick surge of power ...

Also check that the ATX 12V 4-pin power connector is plugged in. The system will not boot up if you forgot to connect the ATX 12V 4-pin power plug.

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Only quick surge of power to motherboard

by darrenm In reply to Only quick surge of power ...

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Only quick surge of power to motherboard

by darrenm In reply to Only quick surge of power ...

The light on the board is actually the stand-by power LED, could that be a problem? And the switch on the PS is definiely an on/off switch.

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Only quick surge of power to motherboard

by TheChas In reply to Only quick surge of power ...

Many new motherboards have a LED connected to the 5 volt standby power line.
This LED is to let you know that there is power to the motherboard, and that it is NOT safe to remove or install hardware.

The front panel power switch for an ATX system is just a momentary push button that signals the power control circuitry on the motherboard to tell the power supply to turn on.

Check your CMOS clear jumper. Many motherboards ship with this jumper set to clear. You need to move it to the "normal" position in order to power up.

I have had a number of systems where I had to clear everything to get that first boot.
Remove the CMOS battery, and unplug power for at least 1/2 hour.

Power up, and set your BIOS settings.
Then, install theCMOS battery before shutting down.

For many socket A motherboards, I have found that I need to set the CPU speed manually to correct cold start problems.

Chas

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Only quick surge of power to motherboard

by darrenm In reply to Only quick surge of power ...

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Only quick surge of power to motherboard

by gkheart1 In reply to Only quick surge of power ...

Hi,

The asus mainboard you are referring to does have the 4 pin power connector on the board. It is located at the top of the board about in the center next to the system memory bank closest to the cpu socket. without the 4 pin connected it will not run. Not all 478 pin P4 boards have this connector. If your power supply doesn't have a 4 pin power connector you will have to get a p4 ps that does. Or, Your ps may have gone sour.
Regards Gil

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Only quick surge of power to motherboard

by darrenm In reply to Only quick surge of power ...

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