[. . . ] MD80-TM0 Quick Reference Guide P/N: 1 2 3 4 5 6 7 8 No. [. . . ] 2 4 6 8 10 12 14 16 18 20 22 24 Pin Define 5V Standby ID LED+ ID LEDSystem Front Board LED+ System Status LEDLAN1 Active LED+ LAN1 Link LEDSMBus Data SMBus Clock Case Open LAN2 Active LED LAN2 Link LED1 2 HDD Back Plane Board Header No. 1 3 5 7 9 11 13 15 17 19 21 23 25 Pin Define BP_SGP_CLK BP_SGP_GLD BP_SGP_DOUT Key Pin GND BP_LED_G_N BP_SGP_DIN GND GND P_3V3_AUX P_3V3_AUX GND BP_PRESENSE No. 2 4 6 8 10 12 14 16 18 20 22 24 26 Pin Define No Connect FAN_SGP_GLD GND Reset BP_LED_A_N GND No Connect SMB_BP_DATA SMB_BP_CLK BMC_ACK BMC_REQ Key Pin GND RDIMM LRDIMM  When only one DIMM is used, it must be populated in memory slot0 first.  Memory populated sequence must be followed with slot0/slot1/slot2  System will not boot normally with incorrect populated sequence. Jumper Settings No. 1 Desription Clear CMOS Jumper 1-2 Close: Normal operation (Default setting) 2-3 Close: Clear CMOS data. S3 Power On Select Jumper 1-2 Close: Stop an initial power on when BMC is not ready. ME Update Jumper 1-2 Close: Normal operation (Default setting) 23 24 25 26 2 2 3 7 SATA Connector 7 No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Pin Define GND P_3V3_AUX LPC_RST P3V3 LPC_LAD0 IRQ_SERIAL LPC_LAD1 TPM_DET_N LPC_LAD2 NC LPC_LAD3 GND LPC_FRAME_N GND No. [. . . ] 1 2 Pin Define Key Pin GND Case Open Intrusion Header Open: Normal operation. Reserved 1C9 0C1 1D9 0D1 1D1 1C1 1B1 1A1 1A9 0A1 0B9 0B1 0D9 0C9 0B9 0A9 1 Closed: Active chassis intrustion alert. LSI Firmware Readiness LED (LED5): State Description On BMC firmware is initial Blink BMC firmware is ready Off AC loss LSI RAID Key Header (IMR_KEY ): 2 1 No. [. . . ]