Question about ASUS P4P800-MX Motherboard

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Power supply my power supply wrecked, so i bought a new one but nothing happens, but green light on board comes on. nothing else happens.i have pulled everything of the board but the fans and tried to power up and still nothing. all caps look good and no smells.please help!!!!!!

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I think your problem is not with the power supply, its the hdd or memory thats causing the problem. try to check the cables, and re insert the memory then start up your pc again.

allen

Posted on Jun 12, 2008

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It is more than likely the power supply that is faulty. Newer PSU's have a 5volt supply missing, this means that some older boards will not run with the new PSU's. Try and find an exact match for your older supply but with a better power rating, if that is what is required.

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1. You may have a power supply issue.
2. Try removing the power supply and replacing it with a know good one with the same specifications.
3. the power supply is giving the +12 volt to the fans but not to the rest of the board.

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1. Could be as simple as not having the Power Switch on the right jumper...double check.
2. The board will power up with nothing hooked to it... just power, CPU, MEM... disconect everything to just to get the board up to the bios.
3. Make sure PS is securly connected to the MB.
4. Check Jumper on the Board to make sure the Test Jumpers are not set
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If everything is working properly, then yes, those lights are normal. Many motherboards have LEDs on them to show standby power. You probably didn't notice them until you worked on the thing.

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Remove all connectors and cards except vga and power supply. and one stick of memory and start there.
If its still an issue remove the board from the case , it may be shorting out on something and try it outside the case,
check the power supply switch for 110/220v switch on back if it has it.
to manually trigger the power supply on the 24 pin connector
short the green and black wire that is next to it.

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1 Answer

Abit av8


Ensure that you got the cpu fan connected to the correct place, the board has 2 one for the cpu fan andt the other for a system controlled case fan.

If that dont work check to see you got the power supply connected to the board propperly, there is a seperate 4 pin connector using 2 yellow and 2 black wires ensure it is correct.

Check your power supply

unplug the power supply and bridge the green wire with the black one next to it to see if it comes on. OR JUST CHANGE THE POWER SUPPLY TO SEE IF IT WORKS.

YOUR PROBLEM IS A POWER PROBLEM EIGHTER FROM A BAD CONNECTION OR A WRONG HOOK UP AND IF NOT THAT A BAD POWER SUPPLY

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1 Answer

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it could be your power switch, veriy that it isnt the power supply by

1.) un-plug it from the main board
2.) look at the main board connector(one coming of the power supply)
3.) you should see green wire and next to it a black one
4.) using a paper clip bridge the too wires
5.) if it works proceed to net step if not get a new power supply

to check case switch and board switch

1.) plug in power supply to main board
2.) look at the pins where the power button connects to
3.) using a metal object (blade screw driver) bridge the pins

if the board should start up>
then its your power button on the case that is bad, you can try to repair it, chage it or buy a new case,

if it doesnt work.
1.) ensure that jcms(jumper to flash the bios) is set correctly
2.) unjack each drive one at a time to see if any is causing stalling
3.) get a new main board

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Sounds like the Power Supply may be going.

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Either the new power supply you purchased is not functioning correctly. But, assuming it is now that you are getting some form of power to your PC, it is very likely the motherboard. Whatever fried your old power supply (or it could have just been the power supply itself) most likely fried your motherboard in the process. Probably not the CPU since the MB can't even post.

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