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Brand new coolmax cug-950b power supply. everything appears to be hooked up correctly, but it wont power up the mother board

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The best thing when you can't see power going through your computer is
1. check the obvious once again (the current setting in the back of the ps.. is it 115??
2. replace the powersupply for known good powersupply.. if it works, your powersupply is defective (likely) if it doesn't your motherboard (unlikely), your memory (likely) or your cpu (unlikely) maybe the one defective.

Posted on Sep 26, 2008

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My pc desktop wont work its my tower cuz i tried the monitor on a different pc so what could it be


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My Gateway DX 4300-05 won't start. Not even the power supply. Does the motherboard have a reset?


If I am reading the frist part of your stament correctly, the power supply does not even kick on when you press the power button. Don not unplug anything from the inside of the computer at this time, instead check your power cord and make sure it is plugged in thightly to both the computer and power strip. Check to make sure the power strip is on, plug something else (like a light) and test the power strip. If the item does not come on, then you may have a bad power strip. To confirm plug the item you are testing with into the outlet the power strip is plugged in to and see if it works. If not your outlet may be bad, contact an electrician. If everything works, but the power supply is still not kicking on, you possibly have a bad power supply. You will need to pick up a replacement power supply and install it in the computer. This is were you unplug everything wire bundle that comes from the power supply to the mother board (paying attention to what was plugged in where). Take the new power supply, install it, plug everything back in. Now try the power button. If this fails then yes you have a bad mother board.

I know most computer retailers that offer repairs, have a device to check the power supply. A good repair place will check this at little or no cost to you, if you agree to let them install the replacement if it is bad (they will charge you for the power supply and installation of it).

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Dell Optiplex 775 Power light, is flashing, wont turn on. I have recently replaced the PSU with a brand new dell one, as i was getting booting problems, since putting the new one in, i just get the...


could also be a ram stick that ate it. Also some of the older mother boards dont have a 12 volt supply that new cpu chips need might check that as well. Make sure the power supply is turning as well as cpu

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First of all this might sound silly but when you say (turn it back on disconnect my old graphics card on safe mode) did you actually pull out the graphic card from the mother board while POWER WAS ON??? if so you definitively damaged something (the mother board or the power supply) to check you could try an other power supply if it still wont work than it's the mother board, now if I've miss understood your question it sounds like a SHORT CIRCUIT somewhere on the board check for lost screws that could have fallen and running loosely on the mother board while changing your hardware...

Hope this helps!

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My a730n computer will not turn on. The green light flashes in the back. Local frys tested power supply and said it was working. Fans dont come on...nothing?


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Did you plug in the 4-pin ATX power cable from the power supply, to the motherboard? It's the power for your Intel processor. Looks like this, http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

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I have a hp pavilion 513c it wont boot up! the


Hello,

There are only two ways this can go for you.

One- you need a new power supply

OR

Two, you need a new mother board

You can verify the power supply by checking it on another machine

If the power suppy is good

And you do not hear the bios beep- then you are looking at a new motherboard- I would double check the powersupply first- most stores that sell them will let you check before you buy a new powersupply.

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Sounds like the power supply is faulting. If not it is your mother board that has failed.

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The manual you need will be on the board manufacturers web page, howevr I will bet you have the case power switch and perhaps the reset switch on the wrong pins on the mother board. To check this, remove the switch leads from the mother board, then use a small screw driver and bridge the pins on the mother board a pair at a time. All of these leads plug on to the board in a line and not across the two lines of pins. when you get the mother board to fire up by this method geet a torch and look closely alongside the pins you will see the letters PWR SW or RS SW. It does not matter what polarity these two sets of leads are plugged onto both will work. The LED lights on the case front will only work if the polarity is correct but it will not do any harm if they are backwords. On the board you should se two sets of pins marked HDD and PWR these are the led light pins you will know you have them right when the usual red and green lights are working at the front of your tower. Regards mistyman

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