Question about E-Machines (ATX-300GT) (ATX30012) 300-Watt Power Supply

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NEED POWER SUPPLY FOR ELITEGHROUP L7VMM2 MOTHERBOARD


I NEED TO KNOW SPEC. FOR POWER SUPPLY I AQUIRED COMPUTER WITHOUT POWER SUPPLY AND THERE IS NO NANE ON THE COMPUTER SHELL, THAT COMPLICATES my search even more

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There is no specific power suppl that you need. The only differce is the wattage 300, 350 , 500 etc. Your motherboard will work with all types not to worry. The only reason you get a higher wattage power supply is if you plug in a lot of stuff. say you have 3 HDD and 2 CDROMS then you would need the 500 Watt power supply.

Posted on Jan 05, 2009

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Power supply out of system does not power up. is it dead?


No, your power supply is not necessarily dead. Power supplies require a "power good" signal back from the motherboard before they will turn on. In order to test a power supply that has been removed from the computer, you need a PV power supply tester. Without one, you will either have to take you power supply to a PC technician and have him test it or install a known good power supply in your computer.

If you have any additional questions contact me by clicking on the "Add a comment" link located under your problem description on FixYa. Also, if you believe that this information was helpful to you, please return to the FixYa website and rate my response to your question.
Best regards,
Yavacotech

Jan 05, 2011 | Bestec System Power Supplies

1 Answer

My compter is dead, and I just want to verify if it is the power supply, motherboard, or power switch. I have a EG351P-V. If I completely remove it from the computer, plug it in, and turn on the switch on...


No, don't start shorting anything yet! Here's a picture of the power connector:

pgh_pa_guy_11.jpg

Turn on the power switch on the supply, then short the green PS_ON pin (pin 14 or 16 depending on the style plug your supply has) to the black ground pin on either side next to it. DO NOT short across the plug to pin 4.

If the supply is working, this will cause the fan to start up and you can measure output voltages as shown on the diagram. (In fact, this is how the motherboard turns the supply on. The supply provides a 5-volt standby output as long as it's plugged in and turned on to keep the motherboard running to detect the power button. When you press it, the motherboard provides the PS_ON ground to fire everything else up.)

Be aware that without the load provided by the motherboard and other parts of the system, you may be able to measure output voltages (especially if you're using a digital meter) that may not be sufficient to run the system under actual operating conditions. Bad capacitors can cause the voltage to drop when loaded, and this will cause the dead system or other strange troubles. The best way to determine if a power supply is causing problems is by substituting a know good one into the system.

Dec 19, 2010 | Enermax (EG351P-VD) (eg351pvd) 330-Watt...

2 Answers

How to power up a compaq 243890-001 power supply without the the motherboard? Its not green to ground


Remove Power Supply
1 . Shut down your computer and unplug the power cord and all cables connected to the system.

2 . Open the computer case and disconnect all power connectors from the motherboard, drives, cards and fans.

3 . Remove the four screws that secure the power supply to the case. These screws are located on the back of the computer case, at each corner of the power supply.

Wire and Start Power Supply
1 . Switch the power supply to the "Off" (sometimes "O") setting.

2 . Insert the end of one wire from a single pole, single throw (SPST) switch into the green wire of the ATX power connector (the largest power supply connector).

3 . Insert the end of the other wire from the SPST switch into the black wire of the ATX power connector. If your power supply has two black wires, connect the SPST to the black wire directly beside the green wire.

4 . Wrap electrical tape around the ATX power connector and wires from the SPST switch to hold them in place. Make sure there is no exposed copper or silver wire from the SPST switch wires.

5 . Turn the SPST switch to the "Off" position, if not already set. Plug the power supply into the wall outlet and switch it to the "On" (sometimes "I")setting.

6 . Connect any other computer components that you wish to operate without the motherboard, such as fans, drives or cards. Turn the SPST to the "On" setting to activate the power supply.


Hope the above information will be helpful to you.
Thanks.

Dec 01, 2010 | Compaq (243890-001) 250-Watt Power Supply

2 Answers

Not sure if power supply is good??


The supply fan won't run unless you turn the supply on. You can do this by shorting the PS_ON pin on the output connector to an adjacent ground pin. (This page has a nice diagram of the power supply connector.) And just because the fan starts turning, it doesn't mean the supply is good.

Measuring the output of the supply without a load can give misleading results. Especially with a digital voltmeter, outputs can look good but drop too low under load to run the computer. You can buy a power supply tester from several sources that you plug the supply into, but nothing beats an operational test in the system.

New power supplies are quite inexpensive. It might just be easier to buy one if you have any concerns that your current supply isn't working. You can also test the supply in another computer. If that one shows the same trouble as the one you pulled the supply from, you know the supply is responsible. Otherwise you know you have more troubleshooting to do in the rest of the system.

Hope this helps, and thanks for using Fixya!

Mar 27, 2010 | Dynex (DX-PS350W) (DXPS350W) 350-Watt...

1 Answer

Nothing on my computer was working. Screen and disks not working. On and off on power supply doesn't turn on fan. I pulled power supply out. Should the fan go by just plugging into the socket and turning...


This has to be plugged into a motherboard and the switch to it as well is controleed by motherboard so no it will not come on just by applying power. I would try another supply for you inital issue if that does not turn on then what you got here is a cable backwords or a motherboard malfuction of some type.


thanks if this helps please rate it.

Dec 19, 2009 | Antec SL300S 300W Power Supply (045176)...

1 Answer

IS THERE A WAY TO CHECK THIS POWER SUPPLY,I KNOW ITS SWITCHED,I HAVE A METER AND KNOW THE OUTPUT VOLTAGES,IS THERE A WAY TO ACTIVATE OUTPUTS?


Try ZALMAN reserator XT manual. There part about starting it without motherboard connection/ it focuses on ATX power supply pins. cheeking for leakage section of getting started

Aug 29, 2009 | Dell (C3760) 305-Watt Power Supply

1 Answer

COMPAQ 272776-001 Power Supply 200W


They all do, I believe, I installed a new one, into my computer system not long ago, are you sure your power supply is one that the computer can handle? You shouldn't have that much of a problem - I wouldn't go pulling apart the wires on the power supply, its made like that for a reason, what you could try is see if your power supply has seated properly, sometimes if your not working on a flat surface the power supply plug won't go in properly and will not be pushed in all of the way, try laying your computer on its side, and pushing in the plug also, each motherboard has a certain amount of plugs for example 20 and 24, some motherboards want it to be a 20 power plug and others want it to be 24 power plug, thats the plug thats connected to your motherboard, that I'm talking about. make sure you have the right number, and that the motherboard plug and the power supply plug match, basically have the same number of connectors, (I mean that little white plug at the end of the red,yellow,black, wires, I hope this helps. ps- I really had to push on the white plug to get my seated properly

Mar 05, 2009 | HP Compaq 175-Watt Power Supply

1 Answer

Need a power supply to replace a Dynex DX-PS400W


Any power supply with the same pins will do. Just choose a good brand and with same rating or better higher(400 watts or more).

Sep 14, 2008 | Dynex System Power Supplies

1 Answer

Issue with a In Shin Power Supply


ok, the part # is not the model # . I need the MODEL # of the board to help U .

Dec 30, 2007 | System Power Supplies

1 Answer

Shuttle XPC XB51G Barebones - no power


I think you will find your PSU has gone faulty, they are very cheap these days, I would guess at the PSU and replace it "On Spec" with a similar one. Remove the four PSU screws around by the Fan at back. Unplug it from The motherboard noting connections, can only go one way thogh. Take the PSU to ya local repair shop and get another... put new one in connect up to MB and power up. If ya lucky.. ya solved ya problem. Or better still see if you can test it with another one B4 buying another.

Aug 08, 2007 | Shuttle XPC 250W Power Supply (CSSHMIS10)...

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