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Old 06-28-2007, 07:53 PM   #1
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Dell Optiplex GX270 Front-Panel Pinout

I'm not sure if this belongs here but I'm using this computer without the case so I had to find out where the power switch was located on the mobo. After a bit of searching, I found a site with some of the pinouts listed.

http://www.motherboardpoint.com/show...60&postcount=9

Quote:
I just finished figuring out how to do this, and I rang out a bunch more of the wiring than was previously posted.

here's a diagram of the connector on the motherboard:

33 31 29 27 25 23 21 19 17 15 13 11 9 7 5 3 1
o o o o o o x o o o o o o o o o o
o o o o o o o o o o o o o o o o o
34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2

The 34-pin ribbon cable runs to a small sub-board for the front panel, which includes a 16-pin(2x8) header which gets another ribbon cable that goes to the "sub-sub-baord" for the actual poanel light and switches.

The table below shows the functions of the pins on the 34-pin connector, plus where they connect to on the 16-pin "sub-board" header.

34-Pin function 16-Pin
1 GND 3, 7, 15, 16
2 ?
3 ?
4 ?
5 ?
6 ?
7 ?
8 ?
9 GND
10 ? 11
11 GND
12 ?
13 ?
14 GND
15 ?
16 GND
17 ?
18 ?
19 GND
20 Pwr Switch 2
21 “KEY”
22 HD LED 4
23 PWR LED - 5
24 ? 13
25 GND
26 ?
27 PWR LED + 9
28 ? 8
29 GND
30 GND
31 ?
32 GND
33 ?
34 ?

I hope this saves somebody an houtr or 2.

Andy

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Old 07-13-2007, 11:41 AM   #2
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Last....... i spend 2 hours search this info on my mobo with multimeter and testing.


Good info!
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Old 07-23-2007, 11:55 AM   #3
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It took me about that long to find it. I need to buy a multimeter.
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TWM | Cosworth | HKS | AutoExe | Rev | Kumho | Tein | AWR | EBC

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Dell Optiplex GX270
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120GB 2.5" HDD
512MB RAM
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Old 08-06-2007, 08:14 AM   #4
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How is everyone powering theirs? What power supply?
This is the last piece of the puzzle for me so I'd appreciate some input.
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Old 08-09-2007, 03:15 PM   #5
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Why not solder to where the switch goes into the MB?
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Old 08-24-2007, 11:06 AM   #6
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Quote: Originally Posted by Jay_1.8t View Post
How is everyone powering theirs? What power supply?
This is the last piece of the puzzle for me so I'd appreciate some input.

i had a m2-atx but it's not enough. im sending it back tomorrow to exchange for a ds-atx.
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2005 Mazda 3 Hatch
TWM | Cosworth | HKS | AutoExe | Rev | Kumho | Tein | AWR | EBC

Carputer Specs: 98% Completed
Dell Optiplex GX270
P4 2.6GHz
120GB 2.5" HDD
512MB RAM
DS-ATX
BU-353 GPS
XM Direct Universal Tuner
7" Xenarc 700TSV
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Old 08-24-2007, 11:07 AM   #7
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Quote: Originally Posted by MAZDABOY View Post
Why not solder to where the switch goes into the MB?

because this way is easier and not as permanent as solder.
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2005 Mazda 3 Hatch
TWM | Cosworth | HKS | AutoExe | Rev | Kumho | Tein | AWR | EBC

Carputer Specs: 98% Completed
Dell Optiplex GX270
P4 2.6GHz
120GB 2.5" HDD
512MB RAM
DS-ATX
BU-353 GPS
XM Direct Universal Tuner
7" Xenarc 700TSV
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Old 08-24-2007, 11:15 AM   #8
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Quote: Originally Posted by the415 View Post
i had a m2-atx but it's not enough. im sending it back tomorrow to exchange for a ds-atx.

I ended up ordering Carnetix 2140 last night.
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