Question about System Power Supplies

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ATX-250-12E My neightbor gave me this tower. Emachine T2682. There no power at all. I opened it up. You can see a burnt spot on the power supply. Would it be good to purchase another power supply or just scrap it for parts? Thanks, Randy

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Randy, a power supply is relatively cheap even for a good computer.I suggest you should get a new one and get rid of the old one...you can't scrap it for parts especially if it's burnt or shortcircuited...Hope it helps, have a good day.

Posted on Sep 01, 2008

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I getting loud annoying sounds from my CODEGEN ATX2 switching power supply I think its the fan should i replace the power supply and is it affordable to have it done?


Yes you should replace the power supply and you can do it yourself go to the back of the tower and at the top you will be able to see the power supply it is held in with 3 to 4 screws open the side panel and unplug all the wires that go from the power supply to the different components of the computer
then unscrew the power supply from the back of the tower and lift it out you will need to get a ATX
P4 power supply you can get the best price at new Egg ,or Amazon .com the prices very in price from 30.00 to a Hundred or more

Sep 01, 2011 | AMD Codegen 350W ATX P4 Recommended...

1 Answer

My power went out and when it came back on the computer would not come on


eMachines uses low quality hardware components inside their computers. This is the way they can sell them at budget prices.

One main hardware component is the low quality power supply they use.
A generic power supply made by Bestec. (A generic power supply manufacturer)

(PSU. Power Supply Unit. The type of PSU used is a SMPS.
Switched-Mode Power Supply,

http://en.wikipedia.org/wiki/Switched-mode_power_supply )

Low quality;
A) Electrolytic Capacitors (Radial Aluminum Electrolytic Capacitor)
B) Rectifier Bridge
C) MOSFET/s
D) Wiring is too small in gauge
to name a few of the components.

However IMHO it is also best to check out the Power On switch.
There is a simple test to see whether the problem is a faulty Power On switch, or a faulty Power Supply.

The test involves bypassing the Power On switch. The Power On switch is not involved in this test.
A jumper wire is used on the Soft Power On wire, [ PS-ON ], and a Ground wire in the ATX main power cable connector.

If you bypass, and the Power Supply comes on you have a bad Power On switch.
If the Power Supply does Not come on you have a bad Power Supply.
If you would like to know more in detail on how to perform this simple test, simply post so in a Comment.

The Power Supply used is just a common ATX version.
ATX refers to the Form Factor of the power supply.
Regular size ATX form factor is approximately 6 inches Wide, 5-1/2 inches Long, and 3-1/2 inches Tall. (Height)

There are also differences in the pinout of the ATX main power cable.
Yours may have 20-pins, or 24-pins.
Power Supply's sold now take this into consideration.
Their ATX main power cable can be used as a 20-pin, or a 24-pin version.

[ General example of a 20-pin ATX main power cable, and it's connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

Example of a 24-pin ATX main power cable, and it's connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

Your motherboard may also require an additional power cable, commonly referred to as a P4 power cable, or P4 ATX 12V power cable, or just ATX 12V.
The actual name is 4-pin ATX +12 Volt power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

If you would like help in finding an inexpensive reliable Power Supply, please post in a Comment.
I will need to know what Model Number of eMachine you have. It's on the back next to the Windows product key, or up on the side of the computer tower.

If you need anything explained that I have stated here, please let me know in a Comment.
Regards,
joecoolvette

Apr 21, 2011 | E-Machines Bestec ATX-300-12E Rev. D 300w...

1 Answer

Bestec ATX-300-12E Rev. D 300w E-Machine GTW Power Supply Part 100929 (ATX30012E) Power Supply: Do you have to use a emachine power supply...


No it is not neccassary to use a E-machine power supply if your previous one has become faulty. You can use any one as long as it has the required power rating.

May 18, 2010 | E-Machines Bestec ATX-300-12E Rev. D 300w...

1 Answer

How to use ATX-250-12z SMPS with 24 pin


Chances are that 250w power supply is not going to power a motherboard with a 24 pin connector, but you can try.
You will need to purchase a 20 to 24 pin adapter cable.
Google Search Terms: 20 to 24 pin adapter

Oct 27, 2009 | Gateway Emachine Bestec ATX-250-12E PS...

1 Answer

I need a power supply compatible with Cooler Master CAC-T05-UW. Features are ATX Mid Tower, ATX, Micro ATX compatible form factor, 2 External 5.25'' drive bays, 2 External 3.5'' drive bay, 2 Internal...


The Cooler Master RS-600-AMBA-D3 600W ATX12V V2.3 SLI Certified Crossfire ready 80 PLUS certified modular active PFC.

Cooler Master eXtreme power RS550-PCARE3-US 550W ATX12V V2.3 SLI ready CrossFire ready power supply.

Two models that should fit with that tower. Cheers!

Aug 19, 2009 | System Power Supplies

1 Answer

Power Supply Bestec ATX-250-12E Rev.P6


Normally if you open the PSU up warranty will be void. ( if it's Under Warranty). if not once you open the unit the fuse's are located right nest to the power input.

Jan 01, 2009 | Gateway Emachine Bestec ATX-250-12E PS...

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