Question about Dell Dimension 5100 (D51L1) PC Desktop

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Motherboard i unplugged my power supply, speaker, led display all from the mother board and now my computer won't power on i need a manual for my mother board Daughter's 2 year old computer. Series of intermittent shutdowns and rebooting happenings. Finally computer will not boot reliably into bios. Sometimes runs for 10 mins and then cuts out followed by self booting attempts. Tried to reload XP got as far as restarting computer and then crashed out. No BSOD at anytime just blank screen. Have tried reseating CPU thinking heat problem, reseated memory and tried memory stick by stick. no better. Replaced CMOS battery No change. Repeated message "stopped at Checkpoint Ithr or checkpoint Wake UP. Dell say it is not worth repairing! Any help would be welcome

Posted by Anonymous on

  • Anonymous Nov 13, 2007

    Thanks the manual is a help, but a problem with checking the fans is that the current is turned off before they settle down. I did get one chance to test the CPU fan via the diagnostics prog. and it passed. The fan on the PSU is free and turns when the power is first turned on. I fancy trying a replacement PSU as a starter and if this fails getting a refurb MOB. If that fails I will take a gun to it or myself!



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One of the greatest factor in intermittent shutdowns is because of heat issues. try to check the fans if they are all spinning. if all fan's are ok then you only need to replace the motherboard. here's a manual that might come in handy

Hope this helps.


Posted on Nov 13, 2007

  • Anonymous Nov 15, 2007




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These general instructions are intended to supplement or simplify some of the information in your motherboard manual Step 1 Make sure to read the manual that came with the motherboard - instructions differ for each one.
  • Step 2 Ground yourself with any professional grounding equipment you have. Otherwise, ground yourself by touching the computer power supply.
  • Step 3 Place motherboard on its anti-static bag.
  • Step 4 Configure motherboard: Set jumpers or DIP switches for CPU, voltage(s), and bus speed, if necessary. If your motherboard is configured by software, you will need to configure it after you complete the physical installation.
  • Step 5 Position motherboard in case. Line up holes in board with holes in case.
  • Step 6 Insert spacers, plastic stand-offs, washers and screws, as necessary. Tighten screws carefully, but securely.
  • Step 7 Make sure motherboard is not touching metal anywhere.
  • Step 8 Make sure slots and connectors fit into openings on back of case.
  • Step 9 Connect motherboard to power supply.
  • Step 10 Connect CPU fan, if you have one, to power supply.
  • Step 11 Connect reset and power switches to power supply.
  • Step 12 Connect LED indicators to power supply.
  • Step 13 Connect case speaker to motherboard.
  • Step 14 Check all connections.
  • Step 15 Test motherboard (and configure in CMOS if necessary) before installing other components of computer system.
    • If possible, do installation in an uncarpeted area.
    • Be careful not to touch any chips. Handle board by its edges. Static damage (and even oil damage) may cause a failure months after the incident.
    • If you do not understand these instructions or you lack good manual dexterity, have a qualified technician install the motherboard for you
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    To download you're manual for the D815EEA2, please click the link below.
    You need to go to page 85.
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    Power on/off switch, pin 6 is + & pin 8 is - .
    The letter I is used for the internal speaker. The positive pin number 16 & ground pin number 10, letter G

    Good Luck!
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    Well you really need to get a manual for that. Check the website and download the manual with that model, for sure there is one.

    I guess you have connected all the connectors there incorrectly so better look for a manual.

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