Question about Dell Dimension 5100 (D51L1) PC Desktop

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Computer won't start

I have a dell dimension 5100 desktop that was working fine yesterday. Today when I push the button to start up it does nothing. I have checked the power cord and it is fine. The surger protector is fine as the monitor and speakers are plugged into the same protector. Have also tried other outlets with same result. Any suggestions?

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  • azarmi Jan 01, 2008

    I got exactlyt he same problem with my DIM 5100, P4, 531. It was working just fine until today. As ususual, I pushed the power button, but it never turned green, Instead, a yellow light kept blinking and as a result he computer never got turned on. I openned it and looked inside; everything looks OK. Any assistance will be much appreciated.

  • Norvell389 Jan 01, 2008

    I have a dell dimension 4500. I push the power to turn it on, all i'm getting is the dell screen and nothing else. I've check everything inside, all is okay. Can anybody help?


  • Agildur Jan 05, 2008


    I have the same problem with my sisters computer.

    The PSU is working when i short-circuit two of the cables on the connector to the Motherboard, A green led is lighting when the power is plugged in. but it wont start. I have taken out and put in the ram again, and taken a look at the other components than may have been loose.

    The voltage into the house may have been flickering somewhat due to some high power electrical engines being run before we tried to start the computer.
    Could this be a cause, and if so, should the psu still be working?

    What is the led indicating?

    Thanks for any possible replies.

  • ascc Mar 20, 2008

    My Dell 5100 starts sometimes and not other times. If I take the usb keyboard & mouse out and replace it starts. The green mother board light is on. The clock also loses time. Any thoughts anyone ? ASC

  • compucaver Apr 03, 2008

    I have a Dimension 5100. I pulled out the Hard drive to back it up and then put it back in. Now it won't start. The PSU tests good with a tester. There is a green light on the motherboard. I pulled out the modem and unplugged the USB keyboard and mouse.It simply won't start. What the heck?



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Hi...I have a Dell Dimension 5100...I think to solve u guys problem, i think you should reboot the hardware plug into your motherboards...make sure everything is plug into *********** bored properly. Maybe the bios system might be confuse.

Posted on May 18, 2008


I unplugged power from computer, removed motherboard battery, after all excess power was gone... ie green light went out, I plugged power back in, got a fast flashing amber light on front of computer, pressed the power button once, and after about 1 to 2 minutes the system came on, of course the bios stuff was gone, as well as date and time, but seems motherboard is working fine, now I dont know what to do.... possible bad bios chip???

Posted on May 16, 2008


Hi my dell dimension 5100 decided that it want going to power up. I have the green light on the mother board. Everything is clean insode and tightened the best I can tell. IF you could give me any ideas that would be great. Thanks Holly

Posted on Dec 30, 2007

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Can you see a green light on located on the mother board ? I had the same problem with mine right after the warrranty was off, The mother board failed, But you should make sure thats it first by making sure everything Inside of the computer is tight and secure.Unplug and make sure there is no power on and unplugged,Before you touch anything inside your computer discharge any static electricity by touching the metal on the inside of the tower. The Memory modules Make sure that they are pushed in securely in there slots and video card is Pushed in and tight, and any other extras you may have plugged into it, After you do all that put everything back and try to reboot see if that get you up and going. If not let me know I can Help You fix it or repair it myself if you would like, just leave message here or email me. Happy Holidays

Posted on Dec 15, 2007

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