Support Options

Support Home Page

Desktop Computer Will Not Complete Power On Self Test (POST)

Article ID : 577305Date Published : 2012-09-04Journal ID : 0a6ac66c-6f1f-4dec-af64-576642e66cfe
 Table of Contents:
  1. Interpreting No POST Beep Codes
  2. Troubleshooting When There Are No Beep Codes
  3. Clear the Computer CMOS Settings
  4. Remove All Components That Are NOT Essential
  5. Contact Dell Technical Support


Article Summary: This article is designed to troubleshoot a computer that is not completing POST (Power On Self-Test).

Issue 1: Interpreting No POST Beep Codes

If you experience a situation in which the computer does not start at all or if it does turn on (lights turn on and fans are spinning), but the computer does not show any image, listen for a series of beeps during start-up.

When beeping codes are heard, refer to (Table 1) to help troubleshoot the issue with your computer.


Repetitive Beep Codes
1

Possible motherboard failure - BIOS ROM checksum failure.

2

No RAM detected.
NOTE: If you installed or replaced the memory module, ensure that the memory module is seated properly.

3

Possible motherboard failure - Chipset error.

4

RAM read/write failure.

5

Real Time Clock failure.

6

Video card or chip failure.

7

Processor failure.


Table 1: Repetitive Beep Codes


Click HERE for more information on the pre-boot assessment and error codes for Dell computers.


 

Back to Top


Issue 2: Troubleshooting When There Are No Beep Codes

When no beeping codes are heard, perform the following steps:

  1. Disconnect all external peripherals except the keyboard, mouse, and monitor (for desktop systems). Peripherals also include external storage devices such as flash drives, USB devices, cards etc.
  2. Drain MB power about one minute (until MB lights turn off, which can take from 20 seconds up to one minute).
  3. Make sure that the monitor is receiving power and that it plugged into the correct port on the video card. For SLI systems, the correct DVI port to be used would be the one on the primary (upper) video card, the one to the left looking from the back of the computer. This port can also be used for single card configurations.
  4. Remove all the memory sticks (found next to the CPU) and attempt to POST the system using one memory stick at a time on Slot 1. Reinsert all memory sticks, and make sure that their connection to the motherboard is optimal. If after doing this the problem reappears then you may have a defective memory slot on the motherboard.
    Note:  
     
    • For written information on how to open the side panel and to access the memory modules, browse to the Online Owner's Manuals. Click the preferred language. Click to view the Owner's Manual. For information on opening the left side-panel refer to the Left Side-Panel section. For the Memory Modules, locate the Memory Modules(s) section and follow the instructions.

    • Refer to the videos available in the Disassembly and Re-assembly Videos section.
     

Back to Top


Issue 3: Clear the Computer CMOS Settings

Clear the CMOS settings:

Note:  
 
    For more information on how to open the side panel and location of the clear CMOS jumper connector, browse to the Online Owner's Manuals. Click the preferred language. View the Owner's Manual. For information on opening the left side-panel refer to the Left Side-Panel section. For information on the location of the CMOS jumper, locate the Technical Overview section and look in the System-Board Components section for the location of the CMOS jumper.
 

  • Perform different video configuration tests: make sure the video card(s) has/have the proper power connections from the power supply, reseat the video card(s) and if more than one video card is present, try them individually.

    Note:  
     
    • For more information on how to open the side panel and remove and insert the PCI-Express Cards, browse to the Online Owner's Manuals. Click the preferred language. View the Owner's Manual. For information on opening the left side-panel refer to the Left Side-Panel section. For information on removing the video card refer to the Graphics Card section.

    • Refer to the videos available in the Disassembly and Re-assembly Videos section.
     
  • Back to Top


    Issue 4: Remove All Components That Are NOT Essential

    Remove all but the essential components (one memory module and one Video Card only) including, WiFi adapters, TV tuners, Optical Dives (ODD's), Hard Disk Drives (HDD's) and try to turn the computer on.

    Note:  
     
    • For more information on how to open the side panel and remove and insert the components, browse to the Online Owner's Manuals. Click the preferred language. View the Owner's Manual. Refer to each section for instructions on removing that component.

    • Refer to the videos available in the Disassembly and Re-assembly Videos section.
     

  • Refer to Dell Knowledge Base article Computer Does Not Turn on, or is Stuck on the Dell Logo Screen

    1. Back to Top


      Issue 5: Contact Dell Technical Support

      If these solutions do not solve the problem, contact Dell Technical Support for further assistance:


      Contact Dell Technical Support.

       

      Click HERE to check on the warranty status of your Dell computer.

       

      Back to Top



      Toolbar
      Start a New Search
      Look up a journal
      Was this page Helpful?
      Provide Feedback
      Choose your language
      Deutsch
      Español
      Français
      Italiano
      日本語
      Português
      中文
      Svenska
      Suomi
      Cesky
      Nederlands
      Polski
      Norsk
      Dansk
      한글
      snWEB3