Question about Powmax 400 Watt ATX Switching Power Supply - ATX ver. 2.03 - ATX 12V ver. 1.1 - AMD and P4 Ready (PSCM450W) Power Supply

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I have an old e machine 500 (origional operating system was windows 98). I am replacing the ATX switching power supply , 230 wat, model lp6100a. My problem is connecting it. I know all the connectors are not connected, but, I am not certian how to connect it.

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The old AT power supply that these old computers uses has two six pin socket connectors and these are different to the ATX connector.
You cannot buy these power supply now, most likely you might find one/computer in a junk shop.
If you have electronic knowledge you might be able to cut off the connectors from the old power supply and connect it to the ATX power supply and modify the ATX power supply so you can switch on the power to the old computer. The old AT power supply uses a mains power switch whereas the ATX uses low voltage to turn on the power supply.
Good luck & have fun.

Posted on Nov 29, 2008

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My vostro 230 slim tower will not power on. I have replaced the power supply


The RAM modules may need reseating. After reseating and your computer still does not boot up then the RAM maybe faulty. Remove the RAM modules and take them to your friendlt computer shop and get them to test the RAM.

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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

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It is best you replace this power supply.
These power supplies have dangerous voltages inside the unit and if you do not have electronic knowledge, any mistakes you make can be fatal.

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I recommend you replace the switch mode power supply. These power supplies have dangerous mains voltage inside the unit and you should not try to repair if you do not have electronic knowledge.
The cost of a 500 W ATX power supply should be approx. $100.
It is not difficult to swap out the power supply, make sure you have the power connectors are the same as the old power supply.

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According to Acer's website:

http://support.acer.com/acerpanam/desktop/0000/Acer/AspireM5100/AspireM5100sp2.shtml

The computer uses an industry standard 250W power supply so yes as long as you buy one that has all the connectors you need then you'll be fine.

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the voltage switch should be a small red switch, right below where the power cord plugs in. you will need a small screwdriver to switch it easily.

if you are getting no power at all, i would also check all the wiring connections on the motherboard from the ATX power switch. these are not that hard to dislodge and could also account for your problem.
hope this helps

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Reinstalled windows xp on a split partition resulting memory prob


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