dell precision 470 workstation not powering up

Posted on 2011-10-25
Last Modified: 2012-05-12
Hi Experts,

 I have the above workstation and it's not powering up. I'm not sure if its the motherboard or the power supply, how can I confirm that? Fans don't spin and the power supply it not a standard power supply.
Question by:frankbustos
    LVL 12

    Accepted Solution

    Is it indicating any light on the adapter..?
    If fans dont spin, then i will check the power supply first.
    LVL 14

    Expert Comment

    by:Rob Miners
    Test the Power Outlet or Power/Board by plugging in a radio or lamp.

    Try another Power cord/lead if you have one.

    Remove the Power cord from the PSU to discharge the Capacitors in the Power Supply. Then press the Power button for 10 seconds to discharge the Capacitors on the Motherboard. See if it will start. If it does start you can replace the (PSU) Power Supply Unit as it is faulty.

    Remembering to ground yourself by placing the back of your hand on the Power Supply Unit and not moving your feet. By not taking this precaution it is possible that you could inadvertantly cause damage to the PC from an electrostatic discharge.

    Remove the connectors to the Hard drives and CD/DVD drives. Check if it powers on.

    Remove the Power lead from the PSU, disconnect the 20-24 pin power connector from the motherboard. Reinsert the 20-24 pin power connector to the motherboard. Check if it powers on.

    Remove all Add on Cards and see if it will start. Clean the add on cards before reinserting them one at a time and testing.

    Check the Capacitors around the CPU for swelling or bulging. They should have a flat head with a cross indent.

    Swap the Reset connector on the Motherboard to the Power connector to rule out a faulty Power switch.

    Swap the Power Supply unit for a known working unit if one is accessable.

    Author Comment

    there is light on the nic and also the power button in the front is flashing orange...but definitely no fan spining
    LVL 8

    Expert Comment

    If you remove the 20/24 pin connector (and all others) on motherboard and bridge the green and black wires on the 20/24 pin connector with a wire the PS should  power up.  If it does not, you definitely have bad ps.  If the fan does turn on, this simply means that the PS has enough juice to turn on, but may not be enough to power the system.  If that is the case, plug the cables back in, remove the power cable to the HD and power up.....if the system powers on, your HD has gone bad.  If it still does not power on, I would look to replace the PS.
    LVL 91

    Expert Comment

    just test with another PS - they're cheaper than a mobo, ands usually easier to repalce - here some used ones
    LVL 22

    Expert Comment

    by:Dr. Klahn
    If you decide to test the system with another power supply, either

    a)  Use an identical replacement Dell supply, or
    b)  Confirm that the motherboard uses an industry standard ATX 20/24 power supply

    Dell used non-standard power supplies on some systems, and although the connectors looked identical, the pinouts were different.
    LVL 91

    Expert Comment

    it is proprietary, DrKlahn  -see links
    LVL 22

    Expert Comment

    by:Dr. Klahn
    That's what I figured.

    Author Closing Comment

    it was the power supply, thanks.

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    How to improve team productivity

    Quip adds documents, spreadsheets, and tasklists to your Slack experience
    - Elevate ideas to Quip docs
    - Share Quip docs in Slack
    - Get notified of changes to your docs
    - Available on iOS/Android/Desktop/Web
    - Online/Offline

    Suggested Solutions

    This is an article based on some fact, and much personal opinion. While you may differ from me in the things you value in a personal computer, I hope this advice can serve to inspire a more objective comparison of two computers, help your figure out…
    Computer running slow? Taking forever to open a folder, documents, or any programs that you didn't have an issue with before? Here are a few steps to help speed it up. The programs mentioned below ALL have free versions, you can buy them if you w…
    The viewer will learn how to successfully create a multiboot device using the SARDU utility on Windows 7. Start the SARDU utility: Change the image directory to wherever you store your ISOs, this will prevent you from having 2 copies of an ISO wit…
    The viewer will learn how to back up with the free utility from runtime software, DriveImageXML using Windows 8. Download DriveImageXML from Open folder where it was saved: Start installation by double clicking the install scrip…

    760 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    9 Experts available now in Live!

    Get 1:1 Help Now