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Will not run POST at turn on

I have a Dell optiplex GM5100 computer,S/N 78FP8. At turn on it give three long and three short beeps. Nothing esle.

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You can troubleshoot by opening the tower. Rest one hand on the power supply

to prevent static charge. Remove the system battery (about the size of a nickel).

Reset the CMOS jumper by moving it from pins 1 and 2 to 2 and 3. Reseat the

jumper onto pins 1 and 2 then reinsert the battery.

Check to make sure your IDE cables are pressed firmly at their locations.

Check your memory card(s) also for firm seating. If you have an add-on

graphics card you should also check it.

Power up and look for proper key to press in order to enter setup.

Once in Basic Input Output Settings select Load Setup Defaults.

Nate P.

Posted on Jan 14, 2009


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My Dell laptop makes 12 beeps and won't start, why?

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    It is possible that the drive has failed, or the computers power supply has failed, or maybe the memory. Usually when a computer boots, you will hear a beep. if you hear more than the one beep, it will tell you what is causing the problem, let me know how many beeps you hear, if any.

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    the number of beeps will tell you what the problem is the beeps are an error code here are the code list for your computer

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    Dell optiplex Gx 150

    This is a problem with your memory.

    During POST, the computer checks the computer's memory, determines the amount of installed memory, and then writes to and reads from the number of available bytes to ensure proper operation.
    Basic Checks:
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    • Consider installing additional system memory.

    • Run the System Memory test in the Dell Diagnostics.

    • Reseat the memory modules.

    • Restart the computer.
    If the problem still exists after you complete the basic checks, fill out the Diagnostic Checklist as you perform the following steps.
    caution.gif CAUTION: Before you perform this procedure, see "Safety Information."
    1. Reboot the computer.
    Does the RAM count displayed correctly match the actual amount of memory installed in the computer?
    Yes. The computer needed to update the memory count. The problem is resolved.
    No. Go to step 2.
    1. Run the System Memory test group in the Dell Diagnostics.
    Did any of the diagnostics tests fail?
    Yes. Contact Dell for technical assistance.
    No. Go to step 3.
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    2. Rotate the power supply away from the system board.

    3. Replace the memory module(s).

    4. Close the computer cover, reconnect the computer and peripherals to their electrical outlets, and turn them on.
    Does the RAM count displayed correctly match the actual amount of memory installed in the computer?
    Yes. The memory module(s) were defective. The problem is resolved.
    No. Contact Dell for technical assistance.

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