Question about Dell Optiplex 755 Desktop Desktop Computer

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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

Posted by leo_mart on

  • 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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1 Answer

Jeffrey McDaniel

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  • Master
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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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5 Related Answers

Cnythia Miller

  • 85 Answers

SOURCE: dell dimension 5100, power button has turned orange

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

Posted on Apr 12, 2008

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Anonymous

  • 13 Answers

SOURCE: Dell Dimension 8400 PC won't boot

http://www.computerhope.com/beep.htm

Here's a list of Boot Codes .....start with one stick of Ram

Posted on May 28, 2008

pagebor

Rajkumar Bordoloi

  • 2785 Answers

SOURCE: Dell Dimension 8300 flashing amber power light and dead pc

it seems *********** board is having problem plz send it for servicing

Posted on Aug 08, 2008

Anonymous

  • 89 Answers

SOURCE: Dell XPS fan come on but nothing else powers up.

most likly a hardware issue i would recomend taking it into a shop what is your computer experience?

Posted on Jan 08, 2009

rahulgaikwad

PCpro Techie

  • 137 Answers

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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Shorting the two leads will work but don't keep the two wires together. They are not ment to stay connected. Consider replacing your cases ATX power switch. Take a look at the link provided for a new switch;
http://www.cables4computer.com/Cases_and_Enclosures/Mid-Tower_PC-Cases_ATX_Push_Button_Power_Switch.html

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Good luck.
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