Question about Dell OptiPlex SX270 PC Desktop

3 Answers

Computer fails to start

My Dell Optiplex SX270 fails to start when I press the power button. I made sure all cables were secure, which they were. I then saw that the light on the adapter was green so I knew it was getting power, I then saw that on the inside of the computer an orangish, yellowish light was on, so I knew the CPU unit was recieving power, but the unit still failed to start. Please help me

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  • Torner Nov 19, 2007

    No it does not display anything. The fans fail to turn on. I was wondering if maybe the button just got stuck or broke.

  • Anonymous Nov 19, 2007

    I have the exaxt same problem, I this just started after I finished my move.

  • im no Nov 21, 2007

    i have the same fault and i have changed the powersupply and motherboard that were working fine before i cant understand why as everyrthing is on the board any ideas anyone

  • musaazi Oct 29, 2008

    it doesnt start yet light inside is on.

  • Anonymous Feb 21, 2009

    I have the same problem. Ive tried two power supplies, their power light indicator do not turn on with either, nor does the computer power on when plugged in.

    I could possilbly have two bad power supplies, but I did see the mobo light flicker when I plugged in the adapter.

    Maybe both the supplies are bad, maybe not.



3 Answers

I'm reasonably sure that it is a bulging or bad capacitor issue. We have had Dell replace a large number of motherboards on SX270 and GX270 computers, due to underpowered or counterfeit capacitors on a large batch purchased back in 2005. The capacitors swell or burst until the computer will not turn on anymore. You'll get the amber light inside the unit, plus a green light on the power supply, but the computer will not power up. You can try the solder technique, but you'd be better off replacing the system board, if possible. Happy trails!


Posted on Nov 28, 2007


I have seen the same probelm on other dell computers. They have a problem with ther capasitors that dryes out. If you open the computer, it is possible to identify the bad capasitors, the have a round top (normally flat). It is normally 6 to 8 capasitors, that are faulty.
A repairkit can be bought and if you have experience in soldering, then the computer should work after replacing the capasitors. I did it with success

The problem is that the capasitors used aren't specified to be used in this temperature range and thats why they stop working after a while

Posted on Nov 27, 2007

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  • 41 Answers

HI Torner,

Does it display anything on your monitor?
(if yes then please continue)

Do you see BIOS load when you start your computer?
(if Yes then answer the next question please)

When booting up do you receive any kind of error message (ie. Hardware Failure, Could not load Operating System).


Posted on Nov 18, 2007

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Posted on Jan 02, 2017

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Sep 28, 2009 | Dell OptiPlex SX270 PC Desktop

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Won't turn on - power led comes yellow & blinking

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Disconnect the Power cable / A/c adapter/Battery from computer.
Disconnect External peripherials.
Hold down the power button on the computer for 10 seconds.
Reconnect the power cable or A/c adapter and battery or the computer
Try to turn on the computer
check for Led's on the computer
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Open the computer tower,remove memory modules,reconnect power cable and turn on the computer.If you get a beeping sound after turning on you should be getting beeping sound suggesting the mother board is not bad.Turn on the computer and disconnect power cable from computer.
Reseat 1 memory at a time if you have 2 memory module or if single memory module reseat in different memory slot,swap memory module.
Reconnect the power cable and turn on the computer if it boots to desktop possible issue with 1 of the memory module.
Disconnect the harddrive ide cable from the harddrive .Turn on the computer.
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Aug 27, 2009 | Dell OptiPlex SX270 PC Desktop

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the power supply is probably bad. It's really hard to tell without a little more information. When my power supply went bad on my computer. the hdd light would come on but nothing else and the computer would not even try to start.the power supply puts out several different voltages with both positive and negative outputs.

Aug 01, 2009 | Dell OptiPlex SX270 PC Desktop

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I have a dell sx270 desktop when I plug it in only the fan works

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2) The processor is damaged, or
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Remove the memory modules and test them one by one. Or if you can test them in another PC (assuming both PCs use the same kind of modules).

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The monitor has the problem. the message only means, the connector is not properly connected on motherboared . please try another monitor.

I am sure about this...monitor or the connector ( as u have changed the motherboard) of the monitor has the problem.

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