Question about ASUS P5N-E SLI Motherboard

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No power up

PC did not power up. Replaced the ps with BFG 800w. Now the system attempts to power up but the fans only pulse and pc still does not boot. Motherboard gone bad??

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  • 156 Answers

Check the cmos reset jumper and check the case switch then.. I would look on the jumper positions for the case and short the PWR SW to see if the case switch is messed up. Then make sure to check all the peripherals.. remove them and re-install... make sure the memory is set in properly. Try to boot without any drives plugged in to see if any drives might be bad.

Posted on May 02, 2008

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I have a mcp61sm-am and I was looking in putting a 800w power supply in it and am concerned if it would fry my pc


Assuming all the supply voltages are correct the large PS will not fry your computer, PC will simply use what it is needed and nada more.

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1 Answer

Power pulsing


Did you put a compatible video card in? What do you mean by pulse on and off? Is it trying to boot up, then shuts off before it boots?

Remove the power cord and press and hold the power button for 30 seconds, then put it back in and try to boot.

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Gateway 503gr has no power, the standby light flashes green when I remove power. Tried new PS and the standby LED stays lit. I then tried both new and old PS disconnected from board and shorted...


Disconnect everything from the motherboard except the power supply connections and cpu fan. Install one stick of RAM and connect your monitor. Then try starting up. See if you get any BIOS boot messages. This will tell you that the board and processor are okay.

With what you say you've tried already, I'm thinking you might have a bad processor. Most every other problem would result in some kind of error like POST beep codes or messages on screen. If the system still doesn't boot with the bare minimum parts installed, replace the processor.

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For 3 weeks My Dell 4700C had difficulty starting. It took from 3-6 attempts to start. In the 3rd week the fan began to sound like a plane starting up. It would get louder and louder until I thought it...


hi have you heard any beeps when pc starts they tell you whats going on 1 beep all good and so on what ive found over the years is some times things need to be reseated turn pc off unplug try to start to drain power touch psu with hand on metal to earth then take ram out and reseat it same as batt take out try to start with no pwer to drain board again but in go in to bios change any setting like which hard drive you want to start first tell me how that goes cheers mate ps i never heard of cpu being limited by ram its you motherboard and os system which deside how much ram you pc can handle 32bit can read 4 gigs 64 bit over 12gigs

Oct 17, 2009 | Dell Dimension 4700 PC Desktop

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Pc sht down stating thermal error. suppose processr fan not working. can this be the cause of the eror?


Most of the time you'll never hear the CPU fan. If you don't hear the normal fan sounds coming from your computer, it is most likely the power supply cooling fan. Hold you hand at the back of the computer where the power chord plugs in, while the computer is running, and test if you feel air blowing on your hand. If you don't, then replace your power supply. Make sure, when checking for a new PS that you get the correct pin count. Best to order from Dell since proprietary systems usually use proprietary parts and a generic PS won't fit in the opening at the back of the computer (alignment of the plug and the fan with the opening, etc.)

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1 Answer

Computer shuts down in games, replaced Mem and PS 800W


I would check the bios and see what the shutdown temps are for the cpu as they may be set too low ( check the manuals for the cpu's as you dont want to set it too high as obviously if it does get too hot you dont want the cpu's ( processors ) to blow up or die on you.

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Whining sound with xion 800 watt power supply.


There is a fan insine the power supply, and also a fan on the CPU. Occasionally there is also a fan on the chassis of the computer itself.

Turn on the computer, take the case off, and listen to identify the source of the noise. If it's inside the PSU, return it and get a new one.

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