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pc will not power up

By bikerwill ·
my nephew bought alll new parts to build a new pc : ASUS m2n68 motherboard ,AMD phenomx4 9450e cpu , 2gigs ram , ultra x cpu cooler it was a complete barebones . Now the motherboard lights up cpufan kicks in then stops tried in a different case to see if maybe was the switch no luck please help

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Is he

by santeewelding In reply to pc will not power up

Or, are you, advanced enough to begin checking inputs and outputs with a multimeter?

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by bikerwill In reply to Is he

i have never done that before yep i am still learning i have put together several pcs in the past but never had a problem till now lol

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Does it complete the POST?

by NickNielsen In reply to pc will not power up

Do you hear it beep? Do you get a monitor display at all? If not, make sure your CPU is properly inserted and secured. Make sure the memory is in the lowest-numbered slot (0 or 1, depending on the mainboard mfr).

And, as Santeewelding noted, check the power connections.

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by bikerwill In reply to Does it complete the POST ...

i will try that

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Some helpful websites

by NickNielsen In reply to post

POST - http://www.pcguide.com/ref/mbsys/bios/bootPOST-c.html

Beep Codes - http://www.pcguide.com/ts/x/sys/beep/index.htm

You can also check the Asus website and documentation for troubleshooting tips.

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is he new

by bikerwill In reply to pc will not power up
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Reset Jumper Power Connections

by TheChas In reply to pc will not power up

Make sure that the clear CMOS or reset jumper is in the normal or run position. This is usually not connected.

Next, make sure that the power supply is a good match for the motherboard and that ALL power connections to the motherboard are connected.

Also, make sure that the CPU is supported by the revision and BIOS version of the motherboard.

It never hurts to take the time to check all of the jumpers and connections on the motherboard.

On a few systems, I have had to reset the CMOS so that the BIOS would detect the installed CPU.


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The CPU and mainboard should be compatible

by NickNielsen In reply to Reset Jumper Power Connec ...

From the way the OP was worded, I think they got something like this: http://www.techbargains.com/news_displayItem.cfm/220139

From the sounds of things, given this is an initial assembly, there's no telling what could be causing it, although I'm inclined to think it's a power problem.

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by bikerwill In reply to The CPU and mainboard sho ...

that was the one from tigerdirect canada i tried a different power supply the cpu fan will stay running when the 4pin is not plugged in but after its plugged in it shuts off

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Wait a minute

by NickNielsen In reply to yes

I certainly hope you've not been plugging and unplugging connectors while power is applied.

Which 4-pin connector are you referring to? Your system should have at least two: the ATX12 connector (the one with black and yellow wires coming from the power supply), and, from the looks of things, the connector from the CPU fan. Both of these will need to be connected properly for the system to work.

In fact, if the black and yellow cable is not connected to the motherboard, the system will not boot.

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