Motherboard connectors pinouts  > Dell pinouts
WARNING. Similar to Optiplex GX BUT +5v & Gnd differs !
Pin Function Pin Function
1 Headphones left 2 Headphones Gnd
3 Headphones right 4 ?
5 Mic left (5150 only) 6 ?
7 Mic right (5150 only) 8 Mic Gnd (5150 only)
9 ? 10 ?
11 ? 12 Gnd
13 ? 14 ?
15 Diag LED 3 16 ?
17 Drive LED 18 Diag LED
19 ? 20 Pwr bi-clr LED Green
"Key" (pin missing) 22 Pwr bi-clr LED Orage
23 Power On switch (to gnd) 24 LAN LED  (+ve)
25 ? 26 LAN LED (Gnd)
27 Gnd 28 Gnd
29 +5v 30 +5v
31 +5v 32 ?
33 Gnd 34 USB 1p3 Data +
35 USB 1p2 Data - 36 ?
37 USB 2p3 Data + 38 USB 2p2p Data -
39 Gnd 40 ?

 

40 pin IDC male connector layout
40 pin IDC male connector
at the I/O Panel
According to 1 reports in our database (1 positive and 0 negative) this pinout should be correct.

Is this pinout
Dell Dimension 3100/E310 and 5150 I/O Front Panel Assembly visual pinout:
Dell Dimension 3100/E310 and 5150 I/O Front Panel Assembly diagram
click to enlarge
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