Question about Dell OptiPlex GX150 SF PC Desktop

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Dell GX150 - Power light flashing orange

Power light flashing orange

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  • Dunli Dec 08, 2007

    I have a similar problem. When I powered up the light is flashing but there is nothing happening. No fan...nothing on the screen except IN POWER SAVE MODE.

    Any ideas???


  • davethetech Jan 10, 2008

    wont power on a dell optiplex 150 ..workin on it now if i fix it ill let u all know what i did yellow light..exactly as described brb

  • jack63ss Feb 02, 2008

    I have the same problem. When I first plug in the power cable the front power light is off but the LED on the MB is on. As soon as I press the power switch the power light starts flashing orange, there is a brief whirring sound, like something was trying to start up, but nothing happens. I have reseated the heat sink and memory, and checked the front panel connectors. When I got this system it had all the internal cables disconnected, but I think they are all back correctly. Anything else I could try ? Too bad, as it looks like an okay system. Thanks !

  • porkpiehat Mar 07, 2008

    I've tried to troubleshoot this myself and found that if I hold the power button in, it will stay running.No hard drive activity or fans, but it stays on. when I release power button, the green lights next to the mouse & keyboard ports light up than the machine will go dead. The power light then just blinks amber. Any ideas would be helpful.Oh, I tried most of the simple stuff already like clean cable points,reseat mem. sticks etc. Thanks

  • walter james Jun 25, 2008

    power light flashing orange and wont power on



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A blinking Yellow power light means a dead power supply. Whats with all the overly complicated answers. Every Dell I've ever worked on that had that problem was the power supply and I've fixed hundreds of them.....

Posted on Apr 27, 2010

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 This is a power OR power supply problem.

1. Unplug computer from wall wait 30 sec and replug
    (direct to wall if you formerly used a UPS)
     see if it works
   This is common condition after a thunderstorm

2. If this dowes not fix it . . .
    Unplug power
    open case
    check & reseat all power connectors
    Close case
    plug in
    see if it works

3. If it still does not work you are past the
    "amature hour" attempts to fix it.
    These next steps are assuming the power supply is OK
    and you are looking for some component that has gone bad.
  a. Unplug all unnecessary external USB devices
     like printer / web cam / camera docking station etc.
    (keyboard and mouse are probably essential)
     then plug computer back in and see if it will boot

  b. Open case and unplug any unnecessary drives
      floppy / CD / DVD 
     then plug computer back in and see if it will boot

  c. Unplug ALL drives including the boot drive(s)
      test and see if computer will boot to the POST screen
     (POST = Power On Self Test)
     if you still have the flashing orange light it is likely
     that it is your power supply that has failed.

Most repair shops would immediately try a new power supply 
because they have them in stock.  The steps above cost no
money, and may save you a trip to the shop.

   If you have a spare power supply laying around
   ($40 or so) you can try replacing the power supply.

Posted on Aug 04, 2009

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This is may be because of improper setting of front pannel connections in the motherboard. or due to improper grounding


Posted on Nov 28, 2007

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I was getting no start up, not even cmos screen.Then lost picture, no screen,used on board and external video. I then took out the cmos batter out, the motherboard jumper, and unpluged all power connections, took memory out. Waited, put everything back. I got it to work!! maybe this will be helpful:)
Keep on teching!

Posted on Aug 11, 2010

Check out the following link:

Posted on Apr 09, 2008

I have a dell Optiplex SX280, ultra small form factor. It booted up, then made a noise and went dead. From then on it would power up but would not boot. The fans were running, the hard drive was spinning, but the monitor was completely blank. The power light in front was flashing orange and the motherboard light was orange (which may be normal). The A,B,C,D in back above the power cord were not light up at all. I replaced the RAM and didn't work. I replaced the BIOS battery and it didn't work. I tried a 2nd power supply and it didn't work (I bought 2 power supply units when I purchased computer). I tried a different monitor and didn't work. I inspected all the USB ports and everything seemed fine. Finally I noticed 3 of the capacitors on the mother board were bulging on top and 2 of them had leakage (see this website for example pictures ( I was convinced this was it. Luckily I found a local computer repair shop that replaced the capacitors same day for $60.00 and voila - it booted right up!! So my recommendation is inspect all the capacitors on the motherboard especially if you have this model Dell since apparently it is a known issue.

Posted on Jul 17, 2008

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Check the heat sink connection to the CPU. These units often need to have this cleaned and new compound applied as the original heat sink compound dries out.

Posted on Jan 11, 2008

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6ya staff

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Posted on Jan 02, 2017


  • 1 Answer

SOURCE: Dell Desktop

unplug the power supply hold the power supply button down with the cord out for up to 60 seconds, then plug it back it, worked for me.

mine was caused by a sensor program trying to access the sensors in the PC which caused a boot failure for some reason.
(computer shutting down to protect itself?)

Posted on Nov 25, 2008


Zulfir Sadat

  • 73 Answers

SOURCE: How to start in safe mode Dell Optiplex GX 150

Is it booting to normal mode?

If it is booting to normal mode, click start - run and type msconfig.
Click on Boot.ini tab and Check Safeboot. Click Apply and Close or OK. It will restart the computer to safe mode. Remember to uncheck Safeboot to make the computer to boot in normal mode again.

Posted on Mar 21, 2009


  • 489 Answers

SOURCE: My Dell Precision 380's power light is orange

Check all of the electrical connections to all devices in the machine, especially the motherboard. Many times this is a result of a poor connection being jarred loose during a move.

Posted on Jul 07, 2009

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