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How to fix power supply in Dell optiplex 790 - Computers & Internet

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If a power supply has gone out in a PC the only cost effective thing to do is replace the power supply. If the Optiplex is the Dell I'm thinking of it requires a slim power supply. You may have to contact Dell to purchase another power supply.

Posted on Jan 17, 2013

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  • 2 Answers

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Posted on Jan 02, 2017

  • 326 Answers

SOURCE: Dell optiplex won't Boot-up.. Orange light on motherboard

its going to rather your power supply or your motherboard has died, id try a different power supply first

Posted on Aug 11, 2008

  • 148 Answers

SOURCE: Problem power supply dell optiplex 740 blinking

hi,
this is probably a no power/nopost problem here is a helpfull link
http://tinyurl.com/d4t55m

further queries are welcome
if you think my solution was helpfull please do rate me

Posted on Mar 28, 2009

  • 16 Answers

SOURCE: Dell Optiplex GX280 Video Card Install Problem

You hit that one right on the dot.  ATI website showed the specs for that graphics card you installed as needing a 300 Watt power supply.  Good news though... I researched newegg.com and I believe I found your 300W power supply.  There are 4 different Optiplex gx280 designs with 4 completely different power supplies.  Since you bought the low-profile video card, I believe you have the slim computer case and this power supply should work for you...
http://www.newegg.com/Product/Product.aspx?Item=N82E16817374002

Good Luck

Posted on Jun 11, 2009

  • 82 Answers

SOURCE: power switch dell optiplex sx 270

You problem is most likely caused by faulty capacitors on the motherboard. Most PCs of your age suffered from this. It was a manufacturing defect. Call Dell to see if they will replace it for free. This is a picture of two blown caps so you can id them on your MBmoz-screenshot.png
92b36e7.jpg

Posted on Aug 17, 2009

  • 345 Answers

SOURCE: Dell GX280 Optiplex wont start

Dell GX280 has been known to have issues with mother board because of bad capacitors that were sent out in them at that time. I have had so many issues with them when i working as an it. If you can open up your pc and look on mother board for expanded capacitors or even leaking. if they are not round it means that is the problem. Dells are very easy to open. On top and bottom there are kinda buttons u can press and just open towards the side that has lock for like locker lock and look inside.

Posted on Dec 28, 2009

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My dell optiplex 790 desktop pc have a error code is 2-3-4 and some times 1-2 please i want help


Hello there
I have found two things which will help you.
A Technical Guide to the Optiplex 790 which will download from here:
http://www.dell.com/downloads/global/products/optix/en/optiplex-790-tech-guide.pdf
It is in pdf format and can be saved to your computer for future reference.
Also I found a Service Manual here:
Dell OptiPlex 990 Desktop Service Manual Page 76
If you click on the green download button at the top of the page then you will taken to a page where you enter 3 letters that are given to you and you can then opt to download it or view in your browser. In both cases it can be saved to your computer.
The latter has a good section on beep codes, and light codes on page 73 ( Chap 20) and following.
It gives your 2-3-4 as a possible USB failure, so try booting with no USB items attached - printer, flash drive, scanner, external drive etc.
It gives your 1-2 code as an expansion card failure and gives various means of checking.
Hope this is helpful, if so would you please register that with Fixya
Cheers

Jan 01, 2015 | Dell OptiPlex 790 DT 469-1606 Desktop PC...

1 Answer

330 power supply


Dell Optiplex 330 Desktop Product Video http://www.youtube.com/watch?v=K3CDVOZMVpo DELL (OPTIPLEX GX520/320/330) http://www.youtube.com/watch?v=xbaDqnoDNP4 Unboxing & Setting up My Dell OptiPlex 330 http://www.youtube.com/watch?v=LX_-y8Y9WcY Dell Optiplex Computer Powersupply issues.MTS http://www.youtube.com/watch?v=dzSCXgvAFGg



Mar 25, 2013 | Dell OptiPlex 330 Desktop Desktop Computer...

1 Answer

Dell optiplex 790 driver for windows 7


Drivers can be downloaded online and installed. If you need technical help, you can contact The Best Pc Doctor Team.I am including their contact details.
www.thebestpcdoctor.com
877 407 9229(Toll free)

Oct 12, 2011 | Dell OptiPlex GX270 PC Desktop

3 Answers

DELL OPTIPLEX GX 620 PC WONT SATRT ONLY ORANGE LIGHT KEEPS BLINKING


DELL OPTIPLEX GX 620 PC WILL NOT START.
ONLY ORANGE LIGHT.

Aug 31, 2010 | Dell OptiPlex GX620 PC Desktop

1 Answer

I mistakingly switch the voltage to 110v instead 230V


You are going to have to replace it....obviously. Here are some places that popped as having the supply you need. I have never used any of them personally.

Dell Optiplex Gx1 Gx110 145w Desktop Power Supply 5554t
$14.99 used - eBay Dell 11VTW Optiplex GX110 SFF 110W Power Supply (See 1728P)
$35.00 refurbished - Used-pcs.comNEW Dell Dimension XPS OptiPlex Power Supply, 200W, Dell 824KH
$19.97 new - TXcess Surplus

Oct 07, 2009 | Dell OptiPlex GX110 PC Desktop

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