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dell precision 470 workstation not powering up

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.
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frankbustos
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frankbustos
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1 Solution
 
PradeepCommented:
Is it indicating any light on the adapter..?
If fans dont spin, then i will check the power supply first.
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Rob MinersCommented:
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.
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frankbustosAuthor Commented:
there is light on the nic and also the power button in the front is flashing orange...but definitely no fan spining
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lancecurwensvilleCommented:
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.
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nobusCommented:
just test with another PS - they're cheaper than a mobo, ands usually easier to repalce - here some used ones
http://www.discountelectronics.com/index.php?l=product_detail&p=4831
http://www.itwinkle.com/deposupnh2.html
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Dr. KlahnPrincipal Software EngineerCommented:
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.
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nobusCommented:
it is proprietary, DrKlahn  -see links
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Dr. KlahnPrincipal Software EngineerCommented:
That's what I figured.
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frankbustosAuthor Commented:
it was the power supply, thanks.
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