Intel Desktop Board D975XBX2 Technical Product Specification 
66   
2.7.2.4  Front Panel Header 
This section describes the functions of the front panel header.  Table 29 lists the signal 
names of the front panel header.  
Figure 21 is a connection diagram for the front panel 
header. 
Table 29. Front Panel Header 
Pin Signal  In/ 
Out 
Description Pin Signal In/ 
Out 
Description 
Hard Drive Activity LED 
[Orange] 
Power LED 
[Green] 
1  HD_PWR  Out  Hard disk LED pull-up 
to +5 V 
2 HDR_BLNK_ 
GRN 
Out  Front panel green 
LED 
3  HAD#  Out  Hard disk active LED  4  HDR_BLNK_ 
YEL 
Out  Front panel yellow 
LED 
Reset Switch 
[Blue] 
On/Off Switch 
[Red] 
5 Ground    Ground  6 FPBUT_IN In  Power switch 
7 FP_RESET# In  Reset switch  8 Ground    Ground 
Power Not Connected 
9 +5 V   Power  10 N/C   Not connected 
 
OM18331
Hard Drive 
Activity LED
Reset 
Switch
+5 V DC
N/C
Power 
Switch
+
-
+
-
1
9
87
65
4
2
3
Dual-
colored 
Power LED
Single-
colored 
Power LED
+
-
 
Figure 21.  Connection Diagram for Front Panel Header