Question about Gateway Emachine Bestec ATX-250-12E PS 250w Replacement Power Supply Part Number P/N 100744 (PSATX25012E) Power Supply

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I am looking for instructions on how to replace my e-machine atx-250-12e power supply connection.

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It is important when working with computer components that you work in a static free environment (not on carpet, solid hard surface). First be aware that if you are not careful you can damage the internal circuits of your system. Getting a static discharge clip from Radio Shack is advisable, at the very least, keep a portion of your hand or arm touching the metal case of the computer to avoid static discharge.

That being said, unplug the computer and turn off the switch located on the back near the power supply. If there is not a switch then proceed.
Make sure all of the peripherals, Display, mouse, keyboard, etc. are unplugged from the rear of the case.

Do not use a magnetic screwdriver for any of this procedure.

Locate the screws that keep the case access panel attached and remove them. Locate the power supply within your computer case.
Remember to keep one portion of your hand or arm touching the metal portion of the case.

Remove all of the power leads that are coming from the power supply and going to all of the internal devices such as DVD drives and hard drives. Also, locate and remove the Motherboard power supply plug (there may be more than one) and remove them. Take note of how they are attached to the devices, most have some sort of retention device that holds them secure, do not break this device.

Once all of the power leads are disconnected, locate the screws on the back, outside of the case that are retaining the power supply unit itself. There should be 4 or more screws. Once removed lift the old power supply from the case and place it to the side. Make sure you retain all of the screws that you have removed, you will need to put them back.

Take the new power supply unit and place it into the space that the old unit occupied. Align the screw holes and put the screws back into the rear of the case to hold the unit secure.

Plug all of the power leads back into the supply just the opposite of the way you removed them, starting with the Motherboard power connection.

Double check all of the connections and make sure any wires will not interfere with any moving parts such as fans.

Put the access cover back onto the case and put the screws back into their original places.

Plug in all of your peripherals and make sure the switch on the back of the power supply, if any, is in the on position.

Power up the computer.

Posted on Dec 06, 2008

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They're pretty much all the same.

open the case. pull the 20/24 pin power plug and optional 4-pin power plug out of the botherboard. Remove power plugs from fans, hard drives, cd drives, etc.

unscrew the four screws anchoring the power supply to the case. Slide out the power supply. Put a new one in it's place, the screw holes will line up. Then reconnect the power cables just like they were when you removed the old one and boot 'er up.

All you have to do is make sure the wattage rating of the power supply is higher or equal to the old one. Your old one is only 250 watts. You will have to search VERY hard to find one that low, so don't worry.

E-machines doesn't make particularely powerful desktops so you won't have compatibility problems. Almost EVERY atx psu on the market will work.

Posted on Dec 06, 2008

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