Question about Dell Dimension 5100 (D51L1) PC Desktop

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Power Problem Dell Dimension 5100 will not power up at all. No indicators lit except a green LED on the motherboard. I have removed the power plug from the motherboard and jumped the green wire with a black wire and the power supply powers along with the DVD and hard disk drives. What is most likely the problem.

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  • JohnPS Dec 17, 2007

    I already tried removing the ram. Is the power supply still bad even if I can get it to power up by jumping the green wire to a black wire. If I do that the fan starts and the Hard Drive powers up.

  • JohnPS Dec 24, 2007

    No, I have a new power supply on order and I am going to try that. If that doesn't work, I will assume the motherboard is the problem.

  • Jason Nolasco Jan 11, 2008

    ok i own a dell 5100 desktop computer, and it wont turn on i think i messed up and flip the red switch on the power supply to 230 by accident and the green light is steadily lit on my motherboard i think that might be the source of my problem. what can i do from here what will be the next step to fixxing my computer?

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I recent lost power only to find that my dell pc would not power up after the power had been restored. After doing some searching at work I read that it might be a problem with the usb ports. I unplugged all of my usb devices to inspect the ports. I did not see anything out of the ordinary.

I was at a loss when I decided to try to turn it on while everything was unplugged. The machine powered up as normal. I have lost power again since that first time and the same thing worked again. I found that if it will not power up, unplug it and disconnect all usb devices. After a few minutes try to turn it on again. I think that you will find that it will power up without the usb devices plugged in. Give it a try.

I am not a pc expert, but I believe that it is pretty obvious that dell has some electrical problem with their usb ports. The large number of people complaining of this problem is evidence enough for me. I have read that many have replaced the power supply and the machine will still fail to power up.

Does anybody know if this sounds like faulty usb ports or perhaps a motherboard problem?

Posted on Jan 14, 2008

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Try removing the ram and place it back in, If that does not work your power supply has a short in it..Replace it

Posted on Dec 17, 2007

  • joseph friia Dec 22, 2007

    7 out of 10 power supplies short out. That I have worked on. The only other thing it could be is yor motherboard. Do you hear a beeping sound when to get the power supply to power up?

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1 Answer

Screen will not come on hard drive light no light checked power supply is ok


Things to check:
  1. Power led on the front of the tower, it should be solid green when on. Flashing Amber is generally an indication of a bad power supply inside the tower
  2. Power LED Solid AMBER indicates system is not finishing the power on self test (POST) and you remove all connections from the tower except power and try turning on again. If no change, remove all PCI and PCI-E cards from system, try again, no change replace motherboard.
  3. On the back of the tower are 4 diagnostic LEDs near the ps2 ports marked ABCD, after the POST, during a normal boot the will flash in several sequences and with boot is finished all 4 should be green. If they stop an a different pattern, then that indicates a failure Yellow Yellow Green Green indicate bad RAM for example
  4. If the LEDs on front and back are Green then the system appears to be booting but the monitor display is not functional

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Has anyone solved the not starting issue for dell 5100?


I had the same problem and it turned out to be the Front I/O & Control Panel Assembly. I suspect that the USB ports had shorted out and took the whole card down. The not turning on problem was preceded by the USB ports failing. I couldn't figure out how to bypass the card to power the computer. Dell won't help if you are not under warranty (unless you purchase some additional support). I couldn't find a replacement board on Dell's web site but found some other vendors that sold them. I bought one for about $70 and it did the trick. There seems to be at least two similar model numbers for this card. I don't know if they are interchangeable or what the differences are. If you look on the card there should be a series of numbers. Look for an "X" followed by 4 numbers. In my case it was "X8682". This is the model number for the card. If you search for shopping sites with your Dell model and this card number you should find vendors to buy the card. I think this is a design flaw having the USB ports on the same connection as the on switch. It looks like many people have had this problem. One bad usb port and your whole system is taken down. My guess is that the average user is not going to be able to figure this out and will spend lots of money unnecessarily. For those comfortable opening up the case and covers (you can download the manual from the Dell site) and unplugging ribbon cables this is a fairly simple fix. Keep in mind the card won't come with any instructions. Make sure you follow power safety rules and ground yourself.

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Dell Dimension 2400 with steady amber power light and diagnostic lights of ABC green and D off. What could be the problem?


Steady amber power LED is indicative of a problem with the motherboard. Remove all external connections except power, remove all PCI Cards, ram, disconnect power from all drives, turn on see if power LED is still steady amber. If it is, more than likely the motherboard has a failure. Also check to see if the CPU heatsink is firmly seated (The plastic retainer has been known to fail causing the CPU to overheat)

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3 Answers

Computer will not turn on at all. Dell Dimension 5100 desktop


I would unplug the power supply from the motherboard, wait a little while and then plug it back in.
Try to power everything back up and it should come up.

I am assuming you are getting a light on the motherboard that indicates power is being supplied?

Feb 15, 2009 | Dell Dimension 5100 (D51L1) PC Desktop

3 Answers

Dell dimension power supply / motherboard


you may consider reseating the P1 and P2 cables (from the power supply) connected to the motherboard.


you can go to www.support.dell.com and enter the service tag of your dell system (found at the back of your system) and look for the manual on how to add/remove the parts of the computer.

thanks.

Sep 13, 2008 | Dell Dimension 5100 (D51L1) PC Desktop

3 Answers

Power problem on Dell Dimension 5100


plz check the ram and powersupply unit and try to reset the bios

Sep 02, 2008 | Dell Dimension 5100 (D51L1) PC Desktop

1 Answer

Power problem on 5100


plz check with another power supply or power cord

Jul 28, 2008 | Dell Dimension 5100 (D51L1) PC Desktop

1 Answer

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is ram pushed in good cpu setted well video cards pshued in tight power pushed in good main one plus 12 v atx power ? 4 pin

Jan 20, 2008 | Dell Dimension 5100 (D51L1) PC Desktop

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