Question about E-Machines T2792 PC Desktop

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Pwr sup what pins to jump on mb plug to check old atx pwr sup

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  • dan dwyer Feb 15, 2008

    Tried a new power supply which did not work.

    It does not turn on and the supply fan does not turn on so I thought it may be the cicuit from the case start button.

  • dan gillum May 11, 2010

    Request Information

    by dan111353, posted on Feb 26, 2008
    hello buschcris1:this is dan111353 seen your power supply tester you posted .can you tell me where to get one?

  • dan gillum May 11, 2010

    hello buschcris1:this is dan111353 seen your power supply tester you posted .can you tell me where to get one?


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Buy a new Power suply, they can carry a high voltage charge in there capacitors even after being unplugged and messing with it can get you fried, I did it once in my younger days and it feels terrible. Thankfully it was a small one.

Posted on Feb 15, 2008

  • Chris Busch
    Chris Busch Feb 16, 2008

    depending on the main board you have, alot of times on the set of pins, it will say PWR, RST, and so forth which tells you where to put the pins. is the mainboard installed right also, it shouldnt come in contact with the case directly, there should be plastic or those brass pins that lift it from the case, If you gorund t out you may end up shorting the board.

    Heres the best thing to do. Kepp the receipt for the Power supply so you can return it if its not bad. At my job i use a power tester. I got one for $13 and i use it on Dells and Gateways.

    It has a plug on it where the power supplys ATX plug, plugs into, you plug the four pin square plug into the board like normal and if the board is good all the green lights come on and stay consistant, if not, then the board is bad. now if its just that little switch, good luck finding just that exact switch, but if your so inclined, just buy any old switch and make one.

    heres what the power tester looks like. See pics below.

    Mine has connectors to test a floppy and sata power connections also, so thats what the extra ones are for in case your wondering.

    Unfortunately If the board you have is an off brand MObo, then getting the specs may be difficult but if its a lnown brand, usually you can find it on a there website.

    most pins on the mainboard are labels somehow. there usually in a group and labeled like i said, usually a +_and a Negative, one will say HDD for the hard drive light that blinks when its turned on. you can try guessing till you get it, i had to do that once on a really old MOBO.


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They have a crappy website. I couldn't even find a motherboard diagram in the manual. You can determine which is the power pins by trying plugging the power connector in on each set of pins and pushing the power button until it starts. It needs to be plugged in when you try pushing the power button of course.There would be around 10 pins in two rows the power pins would be on the same row. they should be near the edge of the mother board and usually the power button pins are on the row furthest from the edge. I can't guarantee that though

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I assume you mean the HDD,reset,on switch etc where they plug onto the mobo.

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How do I plug the Power Button wire into the motherboard?

Printed on the MB
HD LED +1 -3
PWR LED +2 -4
RESET 5- 7+ (Why the changed order? & there's no reset button on this computer.)
PWR ON +6 -8

There are nine pins with a little triangle pointing at one and a 2 next to another.
The pins on the MB look like this:

. . . .
. . . . .
1st pin

Found some info on the 506GR. Unfortunately Gateway is keeping the service manual a big secret.

This will help. Thanks please keep updated. please do rate the solution positively .Thank you for using Fixya


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System wont power on unless mb power connector on mb is reset

by mb pwr connector do you mean the swich on the pc case that you press to turn it on or do you mean the large block connector form the power supply ?

If you mean the case switch then you have a faulty one that is sendinga constant signal and locking up the power supply

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Emachines t3830 I need the schematic for MB I umployed the wire for the push bottom without looking at the way they were plug. Now I do not know the correct aligning of the push bottom wires.

If you look at the motherboard there is usually a diagram labeled "FRONT PANEL HDR" that will tell you which pins are for: HDD LED, PWR LED, RESET, PWR ON. etc.
The chart / diagram may be a few inches away from front panel header.
the following example is from my emachine T2893 that I had opened because it won't power up.

the motherboard at the header connector labels pin #2 and with that you can figure out the other
pin numbers

example of diagram on motherboard (Confirm the pin numbers on your motherboard)

| HD LED | 1 - 3 |
| PWR LED | 2 - 4 |
| RESET | 5 - 7 |

| PWR ON | 6 - 8 |

Hope this helps you figure which pins to hook you switch up to.

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i have been to fic's web site, i cannot find any mb labeled au31.

do you have anymore information about the board, how old, which processor, what socket, which north bridge, south bridge, which model system, etc?


however the pins are usually marked "pwr sw" or "pwr" and are usually with all the other front panel connector pins.

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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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