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Model name BLUFORD. E139765 motherboard. I need J16 pin layout for the power switch, reset switch, etc. Dell is not very helpful with this paticular board for some reason. Thank You for any info. DW

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  • DLWOODZ Apr 20, 2009

    Wow, You just blew me away.  Thank you so much.  This helps immensely. 


  • sketchytech Jan 18, 2010

    How do you connect the front usb?

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This is what I found after extensive searching,

......................O
.PWR LED- O O
.HDD LED- O O HDD LED+
.................... O O
.................... O O
.................... O O PWR LED+
.................... O O
...PWR SW O O PWR SW
.................... O O
.CON CNT O O CON CNT

Looks pretty lame, huh? I found this on Dell's Community Forum.
I gather, this motherboard was used in the Dell Dimension 2350.

http://support.dell.com/support/edocs/systems/dim2350/techov.htm#1101565

Looking, at what Dell has for the layout of the Dimension 2350 motherboard, there are 20 pins in the J16 header, just like he has crudely shown above. I don't see one missing in the corner, though. Of course, the link above is a crude example from Dell.

This person stated it was for the J24 header on the motherboard. Also stated that it was the Front Panel I/O header. (At least that's what was stated) I believe he was confused with the Control Panel header J24. Hopefully it is for the J16 Front Panel I/O header, as it has the Power On switch, HDD activity LED, Power LED, and so on.

Indications are that the O's represent the pins. There was a statement of taking -> Note, that there is a missing pin in the upper corner, and this orients the connector view, Orients, how you are looking at the connector. Only you will know for sure. I don't have this motherboard in front of me. Dell ISN'T giving ANY info out.

This person had the Bluford E139765 motherboard, in a Dell Dimension 2350.

The statement was also made, that there is a Brown jumper wire that connects the two CON CNT pins together, but didn't know if this jumper is required, as this person is putting this motherboard, into an aftermarket computer case. (?)

Solution?
What I would do.
I would have the power supply plugged in. I would use an LED lamp, with two wire leads attached to it. Leads of about two inches long, or more. (Borrow one out of the Front Panel, or from another parts computer?)

Twist the ends of the lead wires tightly. I would then touch the leads to two pins. Should they be power Out pins, (HDD activity lamp pins. Power LED pins, and so on), the light will light up, and not short out the two pins touched.

(If the LED light doesn't light up, no biggie. It just means the wires need to be reversed. Bear this in mind, when you go to hook the LED's up)

When the two pins for the Power On is found, the computer will turn on.

Judging by the crude diagram the missing pin is on the upper right.
Only you will know for sure, as the J16 header should have a flat place in one corner, where a pin would go. NO pin.

If so, this is what I see.

Processor to the left, PCI slots to the right, J16 header on the right, above the PCI slots. The header goes along the edge of the motherboard, lengthwise.

I'll number the pins like this.
Starting at the Top Left, and going down the Left side.
Pins 1, 3, 5, 7, 9, 11, 13, 15, 17, and 19.

Starting at the Top Right, and going down the Right side.
NO pin, (Would have been Pin 2),
Pins 4, 6, 8, 10, 12, 14, 16, 18, and 20

Pins 3 and 4 are for the Power LED. (Confusion here)

Pins 5 and 6 are for the harddrive activity LED. PIn 6 is for the + wire/

NO connection to Pins 7, 8, 9, and 10

Pins 11 and 12 are for the Power LED.
(Which ones to use? Pins 11 and 12, or Pins 3 and 4? I leave it up to you to test as the computer is on, and see)

NO connection to Pins 13 and 14

Pins 15 and 16 are for the Power On switch.

NO connection to Pins 17 and 18.

Pins 19 and 20 are for that jumper wire he mentioned. I would try it without it. If the computer doesn't come on, or something doesn't work, like the harddrive for example, I would unplug the computer from power, then attach this jumper. Plug in, and see if everything works.

Posted on Apr 19, 2009

  • 1 more comment 
  • joecoolvette
    joecoolvette Apr 19, 2009

    Forgot to add. Indications are that it's a Mitac motherboard. Mitac has no info.

  • missmartha4u
    missmartha4u Aug 24, 2012

    i wish to thank you, i too have been search for the same answers, you've been a great help.

  • joecoolvette
    joecoolvette Aug 25, 2012

    You're welcome missmartha4u, and thank you to all the other posters of information, also. (3 years ago!)

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I have the same problem with a Dell 2350 and that is how I landed here. I think Joecoolvette gave the most reasoned solution, but I don't the problem can be solved. As it turned out, there was a reason for the confusion between J24 and J16 above. The original Dell 2350 has a adapter with 10 pins that goes to J24. This adapter has the power switch, HDD LED and Power LED. It is Dell part number 421716900002 R00. Because J24 is a female adapter with a small plastic wall surrounding it, the power switch, HDD LED etc from an aftermarket case will not fit J24. J24 has the missing top right corner pin (pin#3). J16 has pin #5 missing.

I will probably just buy another inexpensive board. Dell does not make it easy for its customer to upgrade the case.

Posted on Jan 30, 2010

  • missmartha4u
    missmartha4u Aug 24, 2012

    thank you also for your imput, i will apply it too.

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I recently rebuilt a 2350 and in the middle of it tested the pinouts for the J24 and J16 headers. Find the details at forsale.capitolhill.ca and follow the Computers link.

Posted on Apr 03, 2010

  • missmartha4u
    missmartha4u Aug 24, 2012

    thank you for your added imfo, i will apply it.

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Joecoolvette has the right idea except here is the missing pieces:
power led negative cable goes to #3 pin, + cable goes to #12 pin

Also the jumper on pins 19 and 20 isnt necessary but stops the pre boot error message about the front panel not being connected.

Thanks joecoolvette for your help! I hope this also helps!

Posted on Jun 01, 2009

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  • 2 Answers

Hi to all i need frontpanel usb connectors,s connection
detail

Posted on May 09, 2009

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