Question about Dell Optiplex 755 Desktop Desktop Computer

1 Answer

Dell loud fan noise

When i power the pc has steady green light but a very loud fan noise and nothing shows on the screen

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  • sandeep_c007
    sandeep_c007 Jan 26, 2012

    hey dude its due to virus!! click ctrl+alt+delete ul get TASK-MANAGER. select new task. RUN window pops up. type explorer.exe n u shd get ur screen. install an antivirus scan ur PC.

  • leo_mart Jan 26, 2012

    First of all thanks for responding. Second of all I am unable to see anything on my screen upon turning on the PC. Last but not least I am unable to get to task manager without seeing nothing on the monitor. Plus the monitor works since I've plugged it into another PC. The in front of the chasis is very loud and again lights in the front of power button steady green no blinking amber just steady green but nothing on screen.

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  • Master
  • 669 Answers

Is the computer completing post? This is indicated normally by a single beep after the power button is turned on. On most computers the beep is proceeded by a post screen with the manufactures logo. If the computer is not getting this far, unplug everything but the memory and video. This should cause the computer to give a no hard drive or OS error. If not pull all the memory, this should cause the computer to give a series of beeps (because there is no memory installed). If this does not work either, you could have a bad mother board or power supply.

Hope this helps

Posted on Jan 26, 2012

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If under warranty contact Dell? I had this same problem, a new motherboard and fan assembly fixed this problem. Bad capacitors on the motherbard.

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SOURCE: My Dell Dimension 4600 will not turn on. Steady Amber Light

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
If still no display ,shut down the computer,disconnect power cable.
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.
If still unable to power on .Shutdown the computer and disconnect power cable.Remove video card,sound card ,modem card if any .Connect just the vga cable from monitor to the integrated video port.
Connect power cable and turn on the computer.
If computer turns on possible issue with one of PCI or PCI express card.
If still unable to power on.Disconnect the power connector pin from the motherboard and reconnect it back.Turn on the computer check power power led on motherboard,also check if the processor fan is spinning. if no go then issue with motherboard.

Posted on Sep 03, 2009

Testimonial: "Very detailed advice, thanks! I believe my motherboard is bad, after testing with your suggestions. "

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1 Answer

Dell opitiplex 280 is not giving display. first of all his fan speed to much high and then after 4 or 5 day its display disappeared. its just picking now power and fan also start with high noise and...


OK, I use GX280s as home servers and ran into a similar problem with one of them...

The problem may be serious and not worth fixing (motherboard).

Turn power on
Fan(s) come on full power, sounds like a jet engine, or eventually gets that loud.

See if you power light has gone amber.

You get nothing on the screen, no Dell splash screen/post, nothing.

This is what I posted a while back concerning the above. Obviously I cannot bee 100% certain as I do not have your box in front of me. This a known issue.

--------

See if the power light goes amber after power up. I had (have - still siting in my basement) one that did same. Power up, fans go full blast . Power light goes and stays amber. This is USUALLY caused by bad capacitors on the mother board. Known GX280 problem going back. If you look on the motherboard, the capacitors should have flat tops and not leaking. If the are rounded or leaking, the MB has probably gone bad. Bottom line this is usually a defective motherboard. Mine was a bad caps issue, you issue could be different, but it does sound like the motherboard.

You can google "gx280 solid amber light loud fan" and see the issues. Here is one link.

http://community.spiceworks.com/topic/111476-gx280-solid-amber-light-and-loud-fan

I just replaced one of my old 280s with a dual core Dell Precision 390 workstation for about $118, and that included shipping, off of ebay.

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Ok
A few things to try
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