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EMachine T2958 - No power

EMachines T2958 at my house. It's my brother's. He may have taken a power surge last week. The unit was on a protector but I'm not sure if it was protection enough. Anyway, all plugged in, hit the power button in front, no lights, no camera, no action. There is no power switch on the back.

I have this now and he's asked me to try and fix it. I've had no experience with eMachines but from my reading they appear to be of inferior quality. My guess is I'm looking first at the PSU. I wonder if there are others out here with more experience with eMachines that would like to work along with me to see if we can get this thing restarted. I have some level of electronic skills.

Thanks.

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  • whftherb
    whftherb Nov 05, 2008

    Thanks - quick reply!!! Wow!



    OK, test PSU. I've been looking at those testers for around $20-$25.

    http://www.affordablesurplus.com/ps-powe... I might grab one because you never know when you might need it again.



    Is it your experience that they are worth it? I'm trying to think how these work i.e. leave the PSU in the case, undo the 24pin, and insert into tester. Then the power switch isn't in the circuit is it? Or is the PSU powered on because the tester simulates the power switch?



    H

  • whftherb
    whftherb Nov 12, 2008

    OK, I have the tester. See this: http://www.affordablesurplus.com/atx-pow... The documentation is nil - just some funky basic instructions on the unit and repeated on the little box it came in.



    Now more questions. If you have the 24-pin ATX connector inserted and the AC applied to the PSU, how does it get the necessary signal from the on/off switch? The PSU has no on/off switch of its own on the rear. When I plug in the tester and attach the 110V AC, I get nothing. No PSU fan, no lights on the tester, no sound from the tester - zero. It could be the sign of truly a dead PSU with no hope of going anywhere. I've stopped right there and not tested the HDD, SATA, floppy connectors etc.



    So with the tester in place - how do you tell the PSU to turn on (or attempt to turn on)???



    Thanks.

  • whftherb
    whftherb Nov 13, 2008

    OK, got it! Perfectly understood.



    Now just for my own info, if you have a moment, on these testers - the on/off connection-signal to the PSU through the ATX connector (I think they're the black and green wires) - is probably being genereated INSIDE the tester - IOW the two leads which are momentarily connected upon pressing the front panel power switch. Am I right?

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Yea that's right.Once the PSU has power the tester is powered on too.

Posted on Nov 13, 2008

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You are right about checking PSU first. Check PSU by using a PSU tester. If you don't have a PSU tester you can go to any computer reapir shop and have them check out the PSU for you.In case PSU, is fine there is a possibility that motherboard may be shot.

Posted on Nov 05, 2008

  • Sam Hagin
    Sam Hagin Nov 05, 2008

    They are worth buying if you have to constantly troubleshoot PCs. You test the PSU by inserting the 24pin connector into the connector of the tester then connect the PSU to a known good electrical source. Make sure the PSU is turn on (switch is one 1). PSU tester will show green lights if PSU is good, yellow or orange light if PSU is faulty, no light if PSU is completely dead.

  • Sam Hagin
    Sam Hagin Nov 13, 2008

    No lights or fan spinning indicates the PSU is completely dead and you need to replace it.

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