Question about Dell OptiPlex GX520 PC Desktop

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Darn Power Button Ain't Turning It On

Hi,
Bought a Re-furbished Dell OptiPlex off of eBay. Got the thing ... unpacked it ... hooked it up ... turned it on. Everything worked fine. 'Bout an hour later, tried to turn it on again. Now ... NOTHING. Pulled the power plug out and re-plugged it in. Face of the computer flashed green, fan turned on, then ... nothing.

I must say that the power button on this thing seems junky. Doesn't have that nice "click" feeling to it - something I've always experienced with other PC's. eBay seller hasn't gotten back to me. Thanks!

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  • chrismcmorro Jan 09, 2009

    Thanks, Robert, but it's definitely not sticking. I forgot to mention that this is a Optiplex GX520. Is this indicative of a major problem, or can this be fixed for a reasonable price - under $100. What do you think?

    Thanks!
    Chris

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Hi and welcome to FixYa,

Initially, if there is a reaction on the monitor when the power button is pressed and the fan turns, then it is not a switch failure. Possibilities are:

  • loose component/card internally. You may want to open and visually inspect. Pay particular attention to the memory and video card;
  • are there any beeping sounds;
  • are there any light/LED indicator that lit up when power is pressed;
  • are you referring to a toggle type switch at the rear (on the power supply itself) or the push button power on in front;
  • check for loose video cable connection.
Pls post back result(s). Good luck and Thank you for using FixYa.

Posted on Jan 09, 2009

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I think the power button is fine since the power fan is turning on. But Green screen and nothing tells me that something is wrong with the motherboard. You may have to replace that...

Posted on Jan 09, 2009

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You are right, it is probably the switch that has broken. A tech repair center should charge you about $75.00 to replace.

Posted on Jan 09, 2009

  • blueextc3221
    blueextc3221 Jan 09, 2009

    if there is a "reset" button on the PC, you can also swap it for the power button on the motherboard.

    Plug the little wire harness labeled RST or RESET in to the PWR or POWER pins, and you can tell if it is the switch that is faulty.



    To take this a step further... find someone (or eBay) with a spare case and/or power button. (autozone or similar automotive parts store has 12V momentarty pushbuttons too that you can splice onto the broken button's wires)

    Trill the proper size hole on the removeable side of the case, and plug it in to your motherboard where the current switch is.

    This solution MIGHT cost you $10 in parts and take 10 minutes to install.



    If you want more help, let me know.

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HI
I THINK A large voltage would cuse that problem,,,,but no chips are damaged.leave unplugged for a night.and do a hard reset and it would definitely work.......for tommorow if no contact me

Posted on Jan 09, 2009

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Checkout the processor fan is working or not.and let me know 

Posted on Jan 09, 2009

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If the computer turns on still, but the screen only flashes green, it is probably a graphics card issue. If the computer does not turn on at all, it is a power supply issue. When you bought the computer off of ebay, did it come with a guarantee? I am assuming, if the computer still turns on, that graphics card has died and you would need to replace that.

If there is any further details you can provide about exactly when it flashes green or if the computer actually gets power to it when you hit the power button, that would be great. This will help me further diagnose your issue. If you have any more questions at all, please let me know and I will get back to you right away.

Posted on Jan 09, 2009

  • Logan Margulis Jan 09, 2009

    If it flashes green, it is most definitely a short in the motherboard. You will need to open up your computer and check to make sure everything is connected tightly to the motherboard. If all the connections are tight, than you will probably have to replace your graphics card.

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I doubt it is the power button but likely another failure. refurbished items were typically once used or broken so sometimes you get a bad new one. hopefully you have warranty and can just swap it out. there is definately a hardware failure, power supply or mother board likely. If the computer boots up and hardware is good you get the POST beep sound indicating that, which you don't get. if the power button does anything (ie start it to turn on) then the button is ok, might be flaky but not the problem here. If you have no warranty let me know and we can troubleshoot further internally. Thanks

Posted on Jan 09, 2009

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I think that it has something to do with a crapy refurbishing job they probable just made it look good and didnt actually fix it hence the seller not responding your description is really ro vague for anyof us to help you if possible pleases send pictures to dragon_rage27@att.blackberry.net and ill see what i can find

Posted on Jan 09, 2009

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If the fan is moving after the power button press...then ur button is fine...u need to check all connection on the motherboard if anything loose..

Posted on Jan 09, 2009

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HI,

If it isn't turning on then the problem is with the SMPS.You will have to get it repaired or replaced.

Posted on Jan 09, 2009

  • Priya darshan Jan 09, 2009

    A switched-mode power supply (also switching-mode power supply and SMPS) is an electronic power supply unit (PSU) that incorporates a switching regulator. While a linear regulator maintains the desired output voltage by dissipating excess power in a pass power transistor,
    the SMPS rapidly switches a power transistor between saturation (full
    on) and cutoff (completely off) with a variable duty cycle whose
    average is the desired output voltage

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Check to make sure the power button is not sticking as that will cause it to start then shut down
Robert

Posted on Jan 09, 2009

  • Roberta Smith
    Roberta Smith Jan 09, 2009

    because it was working before it shouldn't be anything major... any beeps when you turn it on... as well you may want to take the cover off and reseat the memory as well



    Robert

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