Question about E-Machines Bestec ATX-300-12E Rev. D 300w E-Machine GTW Power Supply Part 100929 (ATX30012E) Power Supply

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New power supply problem

I recently installed an new power supply on my emachines comp. and it powers up, but then turns off after about a minute. everything is hooked up, but I'm getting nothing on the monitor. Any ideas?

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  • johng2008 Dec 26, 2007

    i see a red light on the mother board

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  • 482 Answers

Try to run it with out the memory and see if you have the right kind, put one stick in and try that, if still does not work, then you must have a short on the motherboard. I would replace that. most of the time the power box goes out it shorts the motherboard out too. if a green light is on, the power box is good and the motherboard is out. Farren

Posted on Dec 26, 2007

  • farren wadley
    farren wadley Dec 26, 2007

    red, green same thing

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1 Answer

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After reading an article about Emachines awhile back, I found out the reason you can't find the schematic- it isn't available, as some motherboards are made specifically for Emachines and therefore not distributed, as they might normally be, but again, others are, but you have to identify them and go through another source to get them- Emachines, appartantly, will not supply them. All is not lost, however...all motherboards have, basically, the same hookups and connectors for the power supplies, hard drives, etc.- they are standard. I found a web blog that explains the power switch, reset, and power led, which will help. Here it is: http://www.computing.net/answers/hardware/emachine-power-sitch-wiring/56545.html
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http://www.tomshardware.com/forum/53750-7-installation-manual-rs480m-w3400-emachine-motherboard
If you google "motherboard wiring" you will find sites that have illustrations of the motherboard, and explain which connectors go to which sockets, and how to identify them.
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One of the reasons that this could be is that the power supply doesn't have enough power to power everything. Trying exchanging it for another one that has more watts. If this is an exact replacement as far as the wattage goes, then your problem may lie else where, and you may want to take it to a reputable local computer repair shop for further inspection.

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